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Enhanced reversible hydrogen storage properties of wrinkled graphene microflowers confined LiBH_(4) system with high volumetric hydrogen storage capacity
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作者 Zhenglong Li Kaicheng Xian +9 位作者 Hao Chen Mingxia Gao Shanqing Qu Meihong Wu Yaxiong Yang wenping sun Chao Gao Yongfeng Liu Xin Zhang Hongge Pan 《Materials Reports(Energy)》 EI 2024年第1期79-88,共10页
LiBH_(4)with high hydrogen storage density,is regarded as one of the most promising hydrogen storage materials.Nevertheless,it suffers from high dehydrogenation temperature and poor reversibility for practical use.Nan... LiBH_(4)with high hydrogen storage density,is regarded as one of the most promising hydrogen storage materials.Nevertheless,it suffers from high dehydrogenation temperature and poor reversibility for practical use.Nanoconfinement is effective in achieving low dehydrogenation temperature and favorable reversibility.Besides,graphene can serve as supporting materials for LiBH_(4)catalysts and also destabilize LiBH_(4)via interfacial reaction.However,graphene has never been used alone as a frame material for nanoconfining LiBH_(4).In this study,graphene microflowers with large pore volumes were prepared and used as nanoconfinement framework material for LiBH_(4),and the nanoconfinement effect of graphene was revealed.After loading 70 wt%of LiBH_(4) and mechanically compressed at 350 MPa,8.0 wt% of H2 can be released within 100 min at 320C,corresponding to the highest volumetric hydrogen storage density of 94.9 g H2 L^(-1)ever reported.Thanks to the nanoconfinement of graphene,the rate-limiting step of dehydrogenation of nanoconfined LiBH_(4) was changed and its apparent activation energy of the dehydrogenation(107.3 kJ mol^(-1))was 42%lower than that of pure LiBH_(4).Moreover,the formation of the intermediate Li_(2)B_(12)H_(12) was effectively inhibited,and the stable nanoconfined structure enhanced the reversibility of LiBH_(4).This work widens the understanding of graphene's nanoconfinement effect and provides new insights for developing high-density hydrogen storage materials. 展开更多
关键词 Hydrogen storage LiBH_(4) NANOCONFINEMENT GRAPHENE High capacity
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Evaluation of Attending Medical Teams and Their Impact on the DRG Components of Cholecystectomy
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作者 Qi Zhang Chuanyu Chen +3 位作者 Yan Wang Huachen Fan wenping sun Jing Deng 《Journal of Clinical and Nursing Research》 2024年第1期113-118,共6页
Objective:This study assessed the role of the attending medical team in the cost control of the cholecystectomy DRG components.Methods:The association between team structure,workflow,and treatment outcomes was analyze... Objective:This study assessed the role of the attending medical team in the cost control of the cholecystectomy DRG components.Methods:The association between team structure,workflow,and treatment outcomes was analyzed using a mixed-methods approach combining quantitative data and qualitative interviews from 628 patients.Results:Inter-professional teamwork significantly affected length of stay,treatment costs,and recurrence rates,with experienced teams performing better in terms of emergency response and collaborative efficiency.Patient satisfaction was generally high,indicating that good teamwork enhances treatment outcomes.Significance:The study highlights the importance of optimizing team configuration to improve the quality,efficiency,and cost control of healthcare. 展开更多
关键词 Attending medical team intervention Diagnosis-related group(DRG)system Healthcare quality and efficiency Interprofessional collaboration
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Electrocatalytic CO_(2) reduction towards industrial applications 被引量:7
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作者 Dezhi Xu Kangkang Li +4 位作者 Baohua Jia wenping sun Wei Zhang Xue Liu Tianyi Ma 《Carbon Energy》 SCIE CAS CSCD 2023年第1期154-180,共27页
Recently,research on the electrocatalytic CO_(2) reduction reaction(eCO_(2)RR)has attracted considerable attention due to its potential to resolve environmental problems caused by CO_(2) while utilizing clean energy a... Recently,research on the electrocatalytic CO_(2) reduction reaction(eCO_(2)RR)has attracted considerable attention due to its potential to resolve environmental problems caused by CO_(2) while utilizing clean energy and producing high‐value‐added products.Considerable theoretical research in the lab has demonstrated its feasibility and prospect.However,industrialization is mandatory to realize the economic and social value of eCO_(2)RR.For industrial application of eCO_(2)RR,more criteria have been proposed for eCO_(2)RR research,including high current density(above 200 mA cm^(−2)),high product selectivity(above 90%),and long‐term stability.To fulfill these criteria,the eCO_(2)RR system needs to be systematically designed and optimized.In this review,recent research on eCO_(2)RR for industrial applications is summarized.The review starts with focus on potential industrial catalysts in eCO_(2)RR.Next,potential industrial products are proposed in eCO_(2)RR.These products,including carbon monoxide,formic acid,ethylene,and ethanol,all have high market demand,and have shown high current density and product selectivity in theoretical research.Notably,the innovative components and strategy for industrializing the eCO_(2)RR system are also highlighted here,including flow cells,seawater electrolytes,solid electrolytes,and a two‐step method.Finally,some instructions and possible future avenues are presented for the prospects of future industrial application of eCO_(2)RR. 展开更多
关键词 carbon dioxide reduction carbon neutral ELECTROCATALYSIS industrial application
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Adsorption Site Regulations of[W–O]‑Doped CoP Boosting the Hydrazine Oxidation‑Coupled Hydrogen Evolution at Elevated Current Density 被引量:2
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作者 Ge Meng Ziwei Chang +7 位作者 Libo Zhu Chang Chen Yafeng Chen Han Tian Wenshu Luo wenping sun Xiangzhi Cui Jianlin Shi 《Nano-Micro Letters》 SCIE EI CAS CSCD 2023年第11期418-434,共17页
Hydrazine oxidation reaction(HzOR)assisted hydrogen evolution reaction(HER)offers a feasible path for low power consumption to hydrogen production.Unfortunately however,the total electrooxidation of hydrazine in anode... Hydrazine oxidation reaction(HzOR)assisted hydrogen evolution reaction(HER)offers a feasible path for low power consumption to hydrogen production.Unfortunately however,the total electrooxidation of hydrazine in anode and the dissociation kinetics of water in cathode are critically depend on the interaction between the reaction intermediates and surface of catalysts,which are still challenging due to the totally different catalytic mechanisms.Herein,the[W–O]group with strong adsorption capacity is introduced into CoP nanoflakes to fabricate bifunctional catalyst,which possesses excellent catalytic performances towards both HER(185.60 mV at 1000 mA cm^(−2))and HzOR(78.99 mV at 10,00 mA cm^(−2))with the overall electrolyzer potential of 1.634 V lower than that of the water splitting system at 100 mA cm^(−2).The introduction of[W–O]groups,working as the adsorption sites for H2O dissociation and N2H4 dehydrogenation,leads to the formation of porous structure on CoP nanoflakes and regulates the electronic structure of Co through the linked O in[W–O]group as well,resultantly boosting the hydrogen production and HzOR.Moreover,a proof-of-concept direct hydrazine fuel cell-powered H_(2) production system has been assembled,realizing H_(2)evolution at a rate of 3.53 mmol cm^(−2)h^(−1)at room temperature without external electricity supply. 展开更多
关键词 Self-powered H_(2)production system Electron redistribution [W–O]dopant Dehydrogenation kinetics
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MicroRNA-124靶向调控caveolin-1介导肝癌细胞恶性行为的研究 被引量:1
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作者 寇大庆 孙文平 綦霞 《中国肿瘤临床》 CAS CSCD 北大核心 2020年第5期227-230,共4页
目的:检测miR-124、caveolin-1在肝癌组织及细胞系中的表达,探讨miR-124靶向调控caveolin-1对肝癌细胞增殖和侵袭的影响。方法:回顾性分析2012年8月至2014年7月32例于大连医科大学附属第一医院收治的行肝癌切除术患者的临床资料和标本,... 目的:检测miR-124、caveolin-1在肝癌组织及细胞系中的表达,探讨miR-124靶向调控caveolin-1对肝癌细胞增殖和侵袭的影响。方法:回顾性分析2012年8月至2014年7月32例于大连医科大学附属第一医院收治的行肝癌切除术患者的临床资料和标本,通过实时定量逆转录聚合酶链反应(qRT-PCR)检测肝癌、癌旁组织以及肝癌细胞系中miR-124、caveolin-1的表达;通过靶基因预测及双荧光素酶报告分析miR-124与caveolin-1的靶向关系;通过qRT-PCR、Western blot检测miR-124对caveolin-1表达的调控;分别用CCK8、平板克隆及Transwell检测细胞增殖和侵袭能力;通过绘制生存曲线,分析miR-124及caveolin-1表达与临床肝癌患者预后的相关性。结果:miR-124在肝癌组织中的表达低于癌旁组织,在高转移肝癌细胞MHCC97H中的表达低于低转移肝癌细胞MHCC97L,而caveolin-1呈现相反的趋势;caveolin-1为miR-124的靶基因,调控miR-124可影响caveolin-1水平;MHCC97H中导入miR-124 mimic可抑制该细胞增殖及侵袭能力,而上调caveolin-1促进该细胞增殖及侵袭能力;敲低低转移肝癌细胞MHCC97L中miR-124水平可增强该细胞的增殖及侵袭能力,下调caveolin-1抑制该细胞的增殖及侵袭能力;肝癌组织miR-124高水平、caveolin-1低水平的患者5年生存时间显著长于相应的miR-124低水平组、caveolin-1高水平组。结论:miR-124通过靶向调控caveolin-1介导肝癌的增殖与侵袭。 展开更多
关键词 miR-124 CAVEOLIN-1 肝癌恶性行为
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Zinc Anode for Mild Aqueous Zinc-Ion Batteries: Challenges, Strategies, and Perspectives 被引量:21
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作者 Jinzhang Yang Bosi Yin +5 位作者 Ying sun Hongge Pan wenping sun Baohua Jia Siwen Zhang Tianyi Ma 《Nano-Micro Letters》 SCIE EI CAS CSCD 2022年第3期32-78,共47页
The rapid advance of mild aqueous zinc-ion batteries(ZIBs)is driving the development of the energy storage system market.But the thorny issues of Zn anodes,mainly including dendrite growth,hydrogen evolution,and corro... The rapid advance of mild aqueous zinc-ion batteries(ZIBs)is driving the development of the energy storage system market.But the thorny issues of Zn anodes,mainly including dendrite growth,hydrogen evolution,and corrosion,severely reduce the performance of ZIBs.To commercialize ZIBs,researchers must overcome formidable challenges.Research about mild aqueous ZIBs is still developing.Various technical and scientific obstacles to designing Zn anodes with high stripping efficiency and long cycling life have not been resolved.Moreover,the performance of Zn anodes is a complex scientific issue determined by various parameters,most of which are often ignored,failing to achieve the maximum performance of the cell.This review proposes a comprehensive overview of existing Zn anode issues and the corresponding strategies,frontiers,and development trends to deeply comprehend the essence and inner connection of degradation mechanism and performance.First,the formation mechanism of dendrite growth,hydrogen evolution,corrosion,and their influence on the anode are analyzed.Furthermore,various strategies for constructing stable Zn anodes are summarized and discussed in detail from multiple perspectives.These strategies are mainly divided into interface modification,structural anode,alloying anode,intercalation anode,liquid electrolyte,non-liquid electrolyte,separator design,and other strategies.Finally,research directions and prospects are put forward for Zn anodes.This contribution highlights the latest developments and provides new insights into the advanced Zn anode for future research. 展开更多
关键词 Zn-ion batteries Zn metal anode DENDRITE Hydrogen evolution Corrosion
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High-loading, ultrafine Ni nanoparticles dispersed on porous hollow carbon nanospheres for fast (de)hydrogenation kinetics of MgH_(2) 被引量:3
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作者 Shun Wang Mingxia Gao +5 位作者 Zhihao Yao Kaicheng Xian Meihong Wu Yongfeng Liu wenping sun Hongge Pan 《Journal of Magnesium and Alloys》 SCIE EI CAS CSCD 2022年第12期3354-3366,共13页
Magnesium hydride(MgH2) is one of the most promising hydrogen storage materials for practical application due to its favorable reversibility, low cost and environmental benign;however, it suffers from high dehydrogena... Magnesium hydride(MgH2) is one of the most promising hydrogen storage materials for practical application due to its favorable reversibility, low cost and environmental benign;however, it suffers from high dehydrogenation temperature and slow sorption kinetics.Exploring proper catalysts with high and sustainable activity is extremely desired for substantially improving the hydrogen storage properties of MgH2. In this work, a composite catalyst with high-loading of ultrafine Ni nanoparticles(NPs) uniformly dispersed on porous hollow carbon nanospheres is developed, which shows superior catalytic activity towards the de-/hydrogenation of MgH2. With an addition of 5wt% of the composite, which contains 90 wt% Ni NPs, the onset and peak dehydrogenation temperatures of MgH2are lowered to 190 and 242 ℃, respectively. 6.2 wt% H2is rapidly released within 30 min at 250 ℃. The amount of H2that the dehydrogenation product can absorb at a low temperature of 150 ℃ in only 250 s is very close to the initial dehydrogenation value. A dehydrogenation capacity of 6.4wt% remains after 50 cycles at a moderate cyclic regime, corresponding to a capacity retention of 94.1%. The Ni NPs are highly active,reacting with MgH2and forming nanosized Mg2Ni/Mg2NiH4. They act as catalysts during hydrogen sorption cycling, and maintain a high dispersibility with the help of the dispersive role of the carbon substrate, leading to sustainably catalytic activity. The present work provides new insight into designing stable and highly active catalysts for promoting the(de)hydrogenation kinetics of MgH2. 展开更多
关键词 Hydrogen storage materials Nano-catalysis Magnesium hydride Porous hollow carbon nanospheres Ni nanoparticles
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Reversible Magnesium Metal Anode Enabled by Cooperative Solvation/Surface Engineering in Carbonate Electrolytes 被引量:1
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作者 Caiyun Wang Yao Huang +5 位作者 Yunhao Lu Hongge Pan Ben Bin Xu wenping sun Mi Yan Yinzhu Jiang 《Nano-Micro Letters》 SCIE EI CAS CSCD 2021年第12期109-119,共11页
Magnesium metal anode holds great potentials toward future high energy and safe rechargeable magnesium battery technology due to its divalent redox and dendrite-free nature. Electrolytes based on Lewis acid chemistry ... Magnesium metal anode holds great potentials toward future high energy and safe rechargeable magnesium battery technology due to its divalent redox and dendrite-free nature. Electrolytes based on Lewis acid chemistry enable the reversible Mg plating/stripping,while they fail to match most cathode materials toward highvoltage magnesium batteries. Herein,reversible Mg plating/stripping is achieved in conventional carbonate electrolytes enabled by the cooperative solvation/surface engineering. Strongly electronegative Cl from the MgCl_(2) additive of electrolyte impairs the Mg…O = C interaction to reduce the Mg^(2+) desolvation barrier for accelerated redox kinetics,while the Mg^(2+)-conducting polymer coating on the Mg surface ensures the facile Mg^(2+) migration and the e ective isolation of electrolytes. As a result,reversible plating and stripping of Mg is demonstrated with a low overpotential of 0.7 V up to 2000 cycles. Moreover,benefitting from the wide electrochemical window of carbonate electrolytes,high-voltage(> 2.0 V) rechargeable magnesium batteries are achieved through assembling the electrode couple of Mg metal anode and Prussian blue-based cathodes. The present work provides a cooperative engineering strategy to promote the application of magnesium anode in carbonate electrolytes toward high energy rechargeable batteries. 展开更多
关键词 Rechargeable magnesium batteries Metal anode Solvation effect PASSIVATION Carbonate electrolytes
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Travel Attractions Recommendation with Travel Spatial-Temporal Knowledge Graphs 被引量:1
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作者 Weitao Zhang Tianlong Gu +3 位作者 wenping sun Yochum Phatpicha Liang Chang Chenzhong Bin 《国际计算机前沿大会会议论文集》 2018年第2期19-19,共1页
关键词 Spatial-temporal KNOWLEDGE GRAPH RECOMMENDATION systemNetwork representation learning
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Toward enhanced alkaline hydrogen electrocatalysis with transition metal‐functionalized nitrogen‐doped carbon supports
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作者 Peng Li Guoqiang Zhao +11 位作者 Ningyan Cheng Lixue Xia Xiaoning Li Yaping Chen Mengmeng Lao Zhenxiang Cheng Yan Zhao Xun Xu Yinzhu Jiang Hongge Pan Shi Xue Dou wenping sun 《Chinese Journal of Catalysis》 SCIE EI CAS CSCD 2022年第5期1351-1359,共9页
Superior catalyst supports are crucial to developing advanced electrocatalysts toward heterogeneous catalytic reactions.Herein,we systematically investigate the role of transition metal‐functionalized N‐doped carbon... Superior catalyst supports are crucial to developing advanced electrocatalysts toward heterogeneous catalytic reactions.Herein,we systematically investigate the role of transition metal‐functionalized N‐doped carbon nanosheets(M‐N‐C,M=Mn,Fe,Co,Ni,Cu,Mo,and Ag)as the multifunctional electrocatalyst supports toward hydrogen evolution/oxidation reactions(HER/HOR)in alkaline media.The results demonstrate that all the M‐N‐C nanosheets,except Cu‐N‐C and Ag‐N‐C,can promote the alkaline HER/HOR electrocatalytic activity of Pt by accelerating the sluggish Volmer step,among which Mn plays a more significant role.Analyses reveal that the promotion effect of M‐N‐C support is closely associated with the electronegativity of the metal dopants and the relative filling degree of their d‐orbitals.For one,the metal dopant in M‐N‐C with smaller electronegativity would provide more electrons to oxygen and hence tune the electronic structure of Pt via the M‐O‐Pt bonds at the interface.For another,the transition metal in M‐N4 moieties with more empty d orbitals would hybridize with O 2p orbitals more strongly that promotes the adsorption of water/hydroxyl species.The results demonstrate the conceptual significance of multifunctional supports and would inspire the future development of advanced electrocatalysts. 展开更多
关键词 Multifunctional support Hydrogen oxidation reaction Hydrogen evolution reaction Metal‐support interaction ELECTROCATALYSIS
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Improved nitrogen reduction electroactivity by unique MoS_(2)‐SnS_(2) heterogeneous nanoplates supported on poly(zwitterionic liquids)functionalized polypyrrole/graphene oxide
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作者 Hui Mao Haoran Yang +6 位作者 Jinchi Liu Shuai Zhang Daliang Liu Qiong Wu wenping sun Xi‐Ming Song Tianyi Ma 《Chinese Journal of Catalysis》 SCIE EI CAS CSCD 2022年第5期1341-1350,共10页
Unique MoS_(2)‐SnS_(2)heterogeneous nanoplates have successfully in‐situ grown on poly(3‐(1‐vinylimidazolium‐3‐yl)propane‐1‐sulfonate)functionalized polypyrrole/graphene oxide(PVIPS/PPy/GO).PVIPS can attract h... Unique MoS_(2)‐SnS_(2)heterogeneous nanoplates have successfully in‐situ grown on poly(3‐(1‐vinylimidazolium‐3‐yl)propane‐1‐sulfonate)functionalized polypyrrole/graphene oxide(PVIPS/PPy/GO).PVIPS can attract heptamolybdate ion(Mo7O246−)and Sn^(4+)as the precursors by the ion‐exchange,resulting in the simultaneous growth of 1T’‐MoS2 and the berndtite‐2T‐type hexagonal SnS_(2)by the interfacial induced effect of PVIPS.The obtained MoS_(2)‐SnS_(2)/PVIPS/PPy/GO can serve as electrocatalysts,exhibiting good NRR performance by the synergistic effect.The semi‐conducting SnS_(2)would limit the surface electron accessibility for suppressing HER process of 1T’‐MoS_(2),while metallic 1T’‐MoS_(2)might efficiently improve the NRR electroactivity of SnS_(2)by the creation of Mo‐Sn‐Sn trimer catalytic sites.Otherwise,the irreversible crystal phase transition has taken place during the NRR process.Partial 1T’‐MoS_(2)and SnS_(2)have electrochemically reacted with N_(2),and irreversibly converted into Mo^(2)N and SnxNz due to the formation of Mo−N and Sn−N bonding,meanwhile,partial SnS_(2) has been irreversibly evolved into SnS due to the reduction by the power source in the electrochemical system.It would put forward a new design idea for optimizing the preparation method and electrocatalytic activity of transition metal dichalcogenides. 展开更多
关键词 MoS_(2) SnS_(2) Poly(3‐(1‐vinylimidazolium‐3‐yl)propane‐1‐sulfonate)functionalized polypyrrole/graphene oxide Nitrogen reduction reaction Irreversible crystal phase transition
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First-row transition metal compounds for aqueous metal ion batteries
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作者 Mengmeng Zhou Xinjun Huang +5 位作者 Xiaomeng Tian Baohua Jia Hongge Pan wenping sun Qin Zhao Tianyi Ma 《Journal of Energy Chemistry》 SCIE EI CAS CSCD 2021年第12期195-216,I0004,共23页
In recent years,a series of aqueous metal ion batteries(AMIBs)has been developed to improve the safety and cost-efficiency of portable electronics and electric vehicles.However,the significant gaps in energy density,p... In recent years,a series of aqueous metal ion batteries(AMIBs)has been developed to improve the safety and cost-efficiency of portable electronics and electric vehicles.However,the significant gaps in energy density,power density,and cycle stability of AMIBs directly hinder them from replacing the currently widely used non-aqueous metal ion batteries,which stems from the lack of reasonable configuration and performance optimization of electrode materials.First-row transition metal compounds(FRTMCs),with the advantages of optional voltage ranges(from low to high),adjustable crystal structures(layered and tunnel types with large spacing),and designable morphology(multi-dimensional nanostructures),are widely used to construct high-performance AMIBs.However,no comprehensive review papers were generated to highlight their specific and significant roles in AMIBs.In this review,we first summarize the superiority and characteristics of FRTMCs in AMIBs.Then,we put forward control strategies of FRTMCs from subsurface engineering to inner construction to promote capacitance control and diffusion control energy storage.After that,the electrochemical performance of the FRTMCs regulation strategies in AMIBs is reviewed.Finally,we present potential directions and challenges for further enhancements of FRTMCs in AMIBs.The review aims to provide an in-depth understanding of regulation strategies for enhancing energy storage to build high-performance AMIBs that meet practical applications. 展开更多
关键词 First-row transition metal Aqueous metal ion batteries Energy storage
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氧调节原生负极-固态电解质界面层助力高稳定性固态钠金属电池
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作者 曹克爽 夏宇凡 +8 位作者 李皓盛 黄慧琴 Sikandar Iqbal Muhammad Yousaf 徐斌 孙文平 严密 潘洪革 姜银珠 《Science Bulletin》 SCIE EI CAS CSCD 2024年第1期49-58,共10页
Solid-state sodium metal batteries utilizing inorganic solid electrolytes(SEs)hold immense potentials such as intrinsical safety,high energy density,and environmental sustainability.However,the interfacial inhomogenei... Solid-state sodium metal batteries utilizing inorganic solid electrolytes(SEs)hold immense potentials such as intrinsical safety,high energy density,and environmental sustainability.However,the interfacial inhomogeneity/instability at the anode-SE interface usually triggers the penetration of sodium dendrites into the electrolyte,leading to short circuit and battery failure.Herein,confronting with the original nonuniform and high-resistance solid electrolyte interphase(SEI)at the Na-Na_(3)Zr_(2)Si_(2)PO_(12)interface,an oxygen-regulated SEI innovative approach is proposed to enhance the cycling stability of anode-SEs interface,through a spontaneous reaction between the metallic sodium(containing trace amounts of oxygen)and the Na_(3)Zr_(2)Si_(2)POi_(2)SE.The oxygen-regulated spontaneous SEI is thin,uniform,and kinetically stable to facilitate homogenous interfacial Na^+transportation,Benefitting from the optimized SEI,the assembled symmetric cell exhibits an ultra-stable sodium plating/stripping cycle for over 6600 h under a practical capacity of 3 mAh cm^(-2).Qua si-sol id-state batteries with Na_(3)V_(2)(PO_(4))_(3)cathode deliver excellent cyclability over 500 cycles at a rate of 0.5 C(1 C=117 mA cm^(-2))with a high capacity retention of95.4%.This oxygen-regulated SEI strategy may offer a potential avenue for the future development of high-energy-density solid-state metal batteries. 展开更多
关键词 Na metal anode Solid-state batteries NASICON Anode interface Solid electrolyte interphase
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Pt single atoms coupled with Ru nanoclusters enable robust hydrogen oxidation for high-performance anion exchange membrane fuel cells
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作者 Jianmei Wang Bingxing Zhang +9 位作者 Xiaozhong Zheng Xuerui Liu Wei Guo Zhouxin Luo Yongfeng Liu Mingxia Gao Jian Chen Zhongbin Zhuang Hongge Pan wenping sun 《Nano Research》 SCIE EI CSCD 2024年第7期6147-6156,共10页
The sluggish reaction kinetics of alkaline hydrogen oxidation reaction(HOR)is one of the key challenges for anion exchange membrane fuel cells(AEMFCs).To achieve robust alkaline HOR with minimized cost,we developed a ... The sluggish reaction kinetics of alkaline hydrogen oxidation reaction(HOR)is one of the key challenges for anion exchange membrane fuel cells(AEMFCs).To achieve robust alkaline HOR with minimized cost,we developed a single atom-cluster multiscale structure with isolated Pt single atoms anchored on Ru nanoclusters supported on nitrogen-doped carbon nanosheets(Pt1-Ru/NC).The well-defined structure not only provides multiple sites with varied affinity with the intermediates but also enables simultaneous modulation of different sites via interfacial interaction.In addition to weakening Ru–H bond strength,the isolated Pt sites are heavily involved in hydrogen adsorption and synergistically accelerate the Volmer step with the help of Ru sites.Furthermore,this catalyst configuration inhibits the excessive occupancy of oxygen-containing species on Ru sites and facilitates the HOR at elevated potentials.The Pt1-Ru/NC catalyst exhibits superior alkaline HOR performance with extremely high activity and excellent CO-tolerance.An AEMFC with a 0.1 mg·cmPGM^(−2)loading of Pt1-Ru/NC anode catalyst achieves a peak powder density of 1172 mW·cm^(−2),which is 2.17 and 1.55 times higher than that of Pt/C and PtRu/C,respectively.This work provides a new catalyst concept to address the sluggish kinetics of electrocatalytic reactions containing multiple intermediates and elemental steps. 展开更多
关键词 NANOCLUSTERS multiscale structure hydrogen oxidation reaction ELECTROCATALYSIS anion exchange membrane fuel cells
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运用传统文化对罪犯教育改造的路径研究——以内视观想为例 被引量:1
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作者 孙温平 《中国监狱学刊》 2023年第4期88-91,共4页
在探索对罪犯进行教育改造的路径中,运用传统文化进行体验式教育改造罪犯意义重大。内视观想经过理论界和监狱实务界的改造,成为一种改造项目,是对传统教育模式的创新。它是以中国传统文化为载体,以体验式教育为形式的一种教育范式。中... 在探索对罪犯进行教育改造的路径中,运用传统文化进行体验式教育改造罪犯意义重大。内视观想经过理论界和监狱实务界的改造,成为一种改造项目,是对传统教育模式的创新。它是以中国传统文化为载体,以体验式教育为形式的一种教育范式。中华传统文化思想与体验式教育的有机结合能够有效降低罪犯的负性情绪,提升换位思考能力和对自身不足的关注,罪犯改造成效明显提升。内视观想项目是新时代下监狱教育改造的新范式。 展开更多
关键词 传统文化 内视观想 教育改造
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Epitaxial interface stabilizing iridium dioxide toward the oxygen evolution reaction under high working potentials 被引量:4
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作者 Guoqiang Zhao Zhouxin Luo +7 位作者 Baohua Zhang Yaping Chen Xiangzhi Cui Jian Chen Yongfeng Liu Mingxia Gao Hongge Pan wenping sun 《Nano Research》 SCIE EI CSCD 2023年第4期4767-4774,共8页
Proton exchange membrane water electrolyzer(PEMWE)driven by renewable electricity is a promising technique toward green hydrogen production,but the corrosive environment and high working potential pose severe challeng... Proton exchange membrane water electrolyzer(PEMWE)driven by renewable electricity is a promising technique toward green hydrogen production,but the corrosive environment and high working potential pose severe challenges for developing advanced electrocatalysts for the oxygen evolution reaction(OER).Although Ir-based materials possess relatively balanced activity and stability for the OER,their dissolution behavior cannot be neglected,in particular under high working potentials.In this work,iridium dioxide(IrO_(2))nanoparticles(NPs)were anchored on the surface of exfoliated h-boron nitride(BN)nanosheets(NSs)toward the OER reaction in acid media.Highly active Ir(V)species were stabilized by the epitaxial interface between IrO_(2)and h-BN,and therefore the IrO_(2)/BN delivered stable performance at increased working potentials,while the activity of bare IrO_(2)NPs without h-BN support decreased rapidly.Also,the smaller lattice spacing of h-BN induced compressive strain for IrO_(2),resulting in improved activity.Our results demonstrate the feasibility of stabilizing highly active Ir(V)species for the OER in acid media by constructing robust interface and provide new possibilities toward designing advanced heterostructured electrocatalysts. 展开更多
关键词 iridium oxide oxygen evolution reaction epitaxial interface electrochemical stability
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Recent advances in catalyst-modified Mg-based hydrogen storage materials 被引量:3
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作者 Yaxiong Yang Xin Zhang +9 位作者 Lingchao Zhang Wenxuan Zhang Huifeng Liu Zhenguo Huang Limei Yang Changdong Gu wenping sun Mingxia Gao Yongfeng Liu Hongge Pan 《Journal of Materials Science & Technology》 SCIE EI CAS CSCD 2023年第32期182-211,共30页
The storage of hydrogen in a compact,safe and cost-effective manner can be one of the key enabling technologies to power a more sustainable society.Magnesium hydride(MgH_(2))has attracted strong research interest as a... The storage of hydrogen in a compact,safe and cost-effective manner can be one of the key enabling technologies to power a more sustainable society.Magnesium hydride(MgH_(2))has attracted strong research interest as a hydrogen carrier because of its high gravimetric and volumetric hydrogen densities.However,the practical use of MgH_(2)for hydrogen storage has been limited due to high operation temperatures and sluggish kinetics.Catalysis is of crucial importance for the enhancement of hydrogen cycling kinetics of Mg/MgH_(2)and considerable work has been focused on designing,fabricating and optimizing catalysts.This review covers the recent advances in catalyzed Mg-based hydrogen storage materials.The fundamental properties and the syntheses of MgH_(2)as a hydrogen carrier are first briefly reviewed.After that,the general catalysis mechanisms and the catalysts developed for hydrogen storage in MgH_(2)are summarized in detail.Finally,the challenges and future research focus are discussed.Literature studies indicate that transition metals,rare-earth metals and their compounds are quite effective in catalyzing hydrogen storage in Mg/MgH_(2).Most metal-containing compounds were converted in situ to elemental metal or their magnesium alloys,and their particle sizes and dispersion affect their catalytic activity.The in-situ construction of catalyzed ultrasmall Mg/MgH_(2)nanostructures(<10 nm in size)is believed to be the future research focus.These important insights will help with the design and development of high-performance catalysts for hydrogen storage in Mg/MgH_(2). 展开更多
关键词 Hydrogen storage Magnesium hydride Kinetics Catalysts REVERSIBILITY
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Tuning coordination environment of iron ions to ensure ultra-high pseudocapacitive capability in iron oxide
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作者 Wubin Du Chenhui Yan +9 位作者 Mingxi Gao Jian Chen Panyu Gao Xuebin Yu Yinzhu Jiang wenping sun Yongfeng Liu Mingxia Gao Shibo Xi Hongge Pan 《Nano Research》 SCIE EI CSCD 2023年第5期6914-6921,共8页
The mechanism governing the pseudocapacitive lithium storage behavior is one of the most critical unsolved issues in conversion-type anodes for lithium-ion batteries.In this work,we,for the first time,demonstrate that... The mechanism governing the pseudocapacitive lithium storage behavior is one of the most critical unsolved issues in conversion-type anodes for lithium-ion batteries.In this work,we,for the first time,demonstrate that the pseudocapacitive capability of iron oxide-based anodes is closely associated with the electronic structures of iron ions.As proof of concept,the introduction of amorphization,nitrogen doping,oxygen vacancies reduces the coordination of iron ions and contributes significantly to the pseudocapacitive lithium storage capability of iron oxide,reaching up to 96%of the specific capacity at 1 mV·s^(−1).Due to the significantly modulated coordination environment,the 3d electrons of Fe(II)are delocalized with increased spin state and the energy band gap is narrowed,accompanied by an upshift of Fermi energy.The redox activity and carrier mobility of iron oxides are substantially increased,which substantially enhance the exchange current density and thereby improve the pseudocapacitive capability of iron oxide. 展开更多
关键词 coordination environment electronic structure exchange current density pseudocapacitive capability lithium-ion batteries
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Interface engineering of heterostructured electrocatalysts towards efficient alkaline hydrogen electrocatalysis 被引量:8
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作者 Guoqiang Zhao Yinzhu Jiang +2 位作者 Shi-Xue Dou wenping sun Hongge Pan 《Science Bulletin》 SCIE EI CSCD 2021年第1期85-96,M0004,共13页
Boosting the alkaline hydrogen evolution and oxidation reaction(HER/HOR)kinetics is vital to practicing the renewable hydrogen cycle in alkaline media.Recently,intensive research has demonstrated that interface engine... Boosting the alkaline hydrogen evolution and oxidation reaction(HER/HOR)kinetics is vital to practicing the renewable hydrogen cycle in alkaline media.Recently,intensive research has demonstrated that interface engineering is of critical significance for improving the performance of heterostructured electrocatalysts particularly toward the electrochemical reactions involving multiple reaction intermediates like alkaline hydrogen electrocatalysis,and the research advances also bring substantial non-trivial fundamental insights accordingly.Herein,we review the current status of interface engineering with respect to developing efficient heterostructured electrocatalysts for alkaline HER and HOR.Two major subjects—how interface engineering promotes the reaction kinetics and what fundamental insights interface engineering has brought into alkaline HER and HOR—are discussed.Specifically,heterostructured electrocatalysts with abundant interfaces have shown substantially accelerated alkaline hydrogen electrocatalysis kinetics owing to the synergistic effect from different components,which could balance the adsorption/desorption behaviors of the intermediates at the interfaces.Meanwhile,interface engineering can effectively tune the electronic structures of the active sites via electronic interaction,interfacial bonding,and lattice strain,which would appropriately optimize the binding energy of targeted intermediates like hydrogen.Furthermore,the confinement effect is critical for delivering high durability by sustaining high density of active sites.At last,our own perspectives on the challenges and opportunities toward developing efficient heterostructured electrocatalysts for alkaline hydrogen electrocatalysis are provided. 展开更多
关键词 Interface engineering HETEROSTRUCTURE Hydrogen evolution reaction Hydrogen oxidation reaction ELECTROCATALYSIS
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2020 Roadmap on gas-involved photo-and electro-catalysis 被引量:1
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作者 Yulu Yang Yang Tang +30 位作者 Haomin Jiang Yongmei Chen Pingyu Wan Maohong Fan Rongrong Zhang Sana Ullah Lun Pan Ji-Jun Zou Mengmeng Lao wenping sun Chao Yang Gengfeng Zheng Qiling Peng Ting Wang Yonglan Luo Xuping sun Alexander S.Konev Oleg V.Levin Panagiotis Lianos Zhuofeng Hu Zhurui Shen Qinglan Zhao Ying Wang Nadia Todorova Christos Trapalis Matthew V.Sheridan Haipeng Wang Ling Zhang Songmei sun Wenzhong Wang Jianmin Ma 《Chinese Chemical Letters》 SCIE CAS CSCD 2019年第12期2089-2109,共21页
Green reactions not only provide us chemical products without any pollution,but also offer us the viable technology to realize difficult tasks in normal conditions.Photo-,photoelectro-,and electrocatalytic reactions a... Green reactions not only provide us chemical products without any pollution,but also offer us the viable technology to realize difficult tasks in normal conditions.Photo-,photoelectro-,and electrocatalytic reactions are indeed powerful tools to help us to embrace bright future.Especially,some gas-involved reactions are extremely useful to change our life environments from energy systems to liquid fuels and cost-effective products,such as H2 evolution(H2 production),02 evolution/reduction,CO2 reduction,N2 reduction(or N2 fixation) reactions.We can provide fuel cells clean H2 for electric vehicles from H2 evolution reaction(HER),at the same time,we also need highly efficient 02 reduction reaction(ORR) in fuel cells for improving the reaction kinetics.Moreover,we can get the clean oxidant O2 from water through O2 evolution reaction(OER),and carry out some reactions without posing any pollution to reaction systems.Furthermore,we can translate the greenhouse gas CO2 into useful liquid fuels through CO2 reduction reaction(CRR).Last but not the least,we can get ammonia from N2 reduction reaction(NRR),which can decrease energy input compared to the traditional Hubble process.These reactions,such as HER,ORR,OER,CRR and NRR could be realized through solar-,photoelectro-and electro-assisted ways.For them,the catalysts used play crucial roles in determining the efficiency and kinds of products,so we should consider the efficiency of catalysts.However,the cost,synthetic methods of catalysts should also be considered.Nowadays,significant progress has been achieved,however,many challenges still exist,reaction systems,catalysts underlying mechanisms,and so on.As extremely active fields,we should pay attention to them.Under the background,it has motivated us to contribute with a roadmap on ’GasInvolved Photo-and Electro-Catalysis’. 展开更多
关键词 H2 evolution reaction O2 reduction reaction O2 evolution reaction CO2 reduction reaction N2 reduction reaction Electrocatalysis Photocatalysis PHOTOELECTROCATALYSIS
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