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Electrochemical reconstruction of non-noble metal-based heterostructure nanorod arrays electrodes for highly stable anion exchange membrane seawater electrolysis
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作者 Jingchen Na Hongmei Yu +7 位作者 Senyuan Jia jun chi Kaiqiu Lv Tongzhou Li Yun Zhao Yutong Zhao Haitao Zhang Zhigang Shao 《Journal of Energy Chemistry》 SCIE EI CAS CSCD 2024年第4期370-382,共13页
Direct seawater electrolysis for hydrogen production has been regarded as a viable route to utilize surplus renewable energy and address the climate crisis.However,the harsh electrochemical environment of seawater,par... Direct seawater electrolysis for hydrogen production has been regarded as a viable route to utilize surplus renewable energy and address the climate crisis.However,the harsh electrochemical environment of seawater,particularly the presence of aggressive Cl^(-),has been proven to be prone to parasitic chloride ion oxidation and corrosion reactions,thus restricting seawater electrolyzer lifetime.Herein,hierarchical structure(Ni,Fe)O(OH)@NiCoS nanorod arrays(NAs)catalysts with heterointerfaces and localized oxygen vacancies were synthesized at nickel foam substrates via the combination of hydrothermal and annealing methods to boost seawater dissociation.The hiera rchical nanostructure of NiCoS NAs enhanced electrode charge transfer rate and active surface area to accelerate oxygen evolution reaction(OER)and generated sulfate gradient layers to repulsive aggressive Cl^(-).The fabricated heterostructure and vacancies of(Ni,Fe)O(OH)tuned catalyst electronic structure into an electrophilic state to enhance the binding affinity of hydroxyl intermediates and facilitate the structural transformation into amorphousγ-NiFeOOH for promoting OER.Furthermore,through operando electrochemistry techniques,we found that theγ-NiFeOOH possessing an unsaturated coordination environment and lattice-oxygen-participated OER mechanism can minimize electrode Cl^(-)corrosion enabled by stabilizing the adsorption of OH*intermediates,making it one of the best OER catalysts in the seawater medium reported to date.Consequently,these catalysts can deliver current densities of 100 and 500 mA cm-2for boosting OER at minimal overpotentials of 245and 316 mV,respectively,and thus prevent chloride ion oxidation simultaneously.Impressively,a highly stable anion exchange membrane(AEM)seawater electrolyzer based on the non-noble metal heterostructure electrodes reached a record low degradation rate under 100μV h-1at constant industrial current densities of 400 and 600 mA cm-2over 300 h,which exhibits a promising future for the nonprecious and stable AEMWE in the direct seawater electrolysis industry. 展开更多
关键词 Direct seawater electrolysis Anion exchange membrane water ELECTROLYSIS Oxygen evolution reaction Oxygen vacancies Operando electrochemistry techniques
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Recanalization of anastomotic occlusion following rectal cancer surgery using a rendezvous endoscopic technique with transillumination:A case report
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作者 jun chi Guang-Yu Luo +3 位作者 Hong-Bo Shan jun-Zhong Lin Xiao-jun Wu Jian-jun Li 《World Journal of Gastroenterology》 SCIE CAS 2024年第37期4149-4155,共7页
BACKGROUND Colorectal anastomotic occlusion is a serious complication of colorectal cancer surgery.Although several treatment strategies have been proposed,the mana-gement of anastomotic occlusion remains challenging.... BACKGROUND Colorectal anastomotic occlusion is a serious complication of colorectal cancer surgery.Although several treatment strategies have been proposed,the mana-gement of anastomotic occlusion remains challenging.In this report,we present a case of anastomotic occlusion recanalization performed using a novel technique involving two endoscopes,one for radial incision and the other serving as a guide light.This novel technique offers significant advantages in terms of operational feasibility,reduced invasiveness,rapid recovery,and shortened hospital stay.CASE SUMMARY A 37-year-old man underwent low anterior resection and prophylactic double-lumen ileostomy for rectal cancer in June,2023.Two months later,complete anastomotic occlusion was observed on colonoscopy.Therefore,we developed a novel atresia recanalization technique.Two endoscopes were placed,one through the colonic anastomosis and the other through the anus.A radial incision was successfully made from the colonic side,guided by the light of the endoscope from the anal side.Atresia recanal-ization was performed within 20 minutes.Three weeks after recanalization,colonoscopy revealed that the diameter of the colorectal anastomosis was approximately 16 mm and the patient therefore underwent stoma reversal in September.During the follow-up period of approximately one year,the patient remained well and no stenosis or obstruction symptoms were observed.CONCLUSION Endoscopic atresia recanalization of colorectal anastomotic occlusion assisted by an opposing light source is safe and effective. 展开更多
关键词 Endoscopy Atresia recanalization Anastomotic occlusion Light source Case report
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自支撑NiFe LDHs@Co-OH-CO_(3)纳米棒阵列电极用于碱性阴离子交换膜电解水 被引量:3
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作者 郭丹丹 俞红梅 +1 位作者 迟军 邵志刚 《电化学》 CAS CSCD 北大核心 2022年第9期77-93,共17页
开发高效耐用的电极对碱性阴离子交换膜电解水(AEMWEs)制氢至关重要。在这项研究中,我们展示了一种高效且稳定的自支撑NiFe LDHs@Co-OH-CO_(3)/NF纳米棒阵列电极分别用于析氧反应(OER)和AEMWE的阳极。在这项工作中,我们将2D的镍铁层状... 开发高效耐用的电极对碱性阴离子交换膜电解水(AEMWEs)制氢至关重要。在这项研究中,我们展示了一种高效且稳定的自支撑NiFe LDHs@Co-OH-CO_(3)/NF纳米棒阵列电极分别用于析氧反应(OER)和AEMWE的阳极。在这项工作中,我们将2D的镍铁层状双金属氢氧化物纳米片(NiFe LDHs)原位生长在1D的碱式碳酸钴纳米线上(Co-OH-CO_(3)/NF),最终得到独特的纳米棒阵列复合结构电极。在三电极体系中,自支撑NiFe LDHs@Co-OH-CO_(3)/NF对OER具有良好的催化活性,在1 mol·L^(-1)KOH中,当电流密度为20 m A·cm^(-2)时,过电位为215 mV。当自支撑NiFe LDHs@Co-OH-CO_(3)/NF作为AEMWE的阳极(70℃,1 mol·L^(-1)KOH),在电流密度为0.5 A·cm^(-2)时,电解电压为1.72 V,并且具有较好的稳定性。进一步的实验表征结果显示了自支撑NiFe LDHs@Co-OH-CO_(3)/NF的优异性能是其具有特殊的形貌结构。这是由于纳米棒阵列电极的三维分层结构可以有效防止纳米片团聚,从而有利于电子转移,为水分解提供大量的边缘活性位点。 展开更多
关键词 镍铁层状双金属氢氧化物 析氧反应 碱性阴离子交换膜电解
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Water electrolysis based on renewable energy for hydrogen production 被引量:98
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作者 jun chi Hongmei Yu 《Chinese Journal of Catalysis》 SCIE EI CAS CSCD 北大核心 2018年第3期390-394,共5页
As an energy storage medium,hydrogen has drawn the attention of research institutions and industry over the past decade,motivated in part by developments in renewable energy,which have led to unused surplus wind and p... As an energy storage medium,hydrogen has drawn the attention of research institutions and industry over the past decade,motivated in part by developments in renewable energy,which have led to unused surplus wind and photovoltaic power.Hydrogen production from water electrolysis is a good option to make full use of the surplus renewable energy.Among various technologies for producing hydrogen,water electrolysis using electricity from renewable power sources shows greatpromise.To investigate the prospects of water electrolysis for hydrogen production,this review compares different water electrolysis processes,i.e.,alkaline water electrolysis,proton exchange membrane water electrolysis,solid oxide water electrolysis,and alkaline anion exchange membrane water electrolysis.The ion transfer mechanisms,operating characteristics,energy consumption,and industrial products of different water electrolysis apparatus are introduced in this review.Prospects for new water electrolysis technologies are discussed. 展开更多
关键词 Water electrolysis Hydrogen production Renewable energy Abandoned solar power Abandoned wind power
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Prognostic values of apoptosis-stimulating P53-binding protein 1 and 2 and their relationships with clinical characteristics of esophageal squamous cell carcinoma patients:a retrospective study 被引量:4
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作者 Xiao-Feng Xie Qing Yang +3 位作者 jun chi Xian-Zi Yang Hui-Yun Wang Guo-Liang Xu 《Chinese Journal of Cancer》 SCIE CAS CSCD 2017年第2期71-80,共10页
Background: Esophageal squamous cell carcinoma(ESCC) is a leading cause of cancer?related death, and new prognostic biomarkers are urgently needed. Apoptosis?stimulating P53?binding protein 1(ASPP1) and 2(ASPP2) have ... Background: Esophageal squamous cell carcinoma(ESCC) is a leading cause of cancer?related death, and new prognostic biomarkers are urgently needed. Apoptosis?stimulating P53?binding protein 1(ASPP1) and 2(ASPP2) have been reported to play important roles in the development, progression, metastasis, and prognosis of cancers, but their roles in ESCC have not been elucidated. In this study, we examined the expression of ASPP1 and ASPP2 in ESCC to evaluate their prognostic values.Methods: The protein expression of ASPP1, ASPP2, and P53 in 175 specimens of ESCC was detected using immuno?histochemical staining; their expression in cancerous and noncancerous tissues was scored according to the stain?ing intensity and the percentage of stained cells. The associations of ASPP1, ASPP2, and P53 with clinicopathologic parameters, overall survival(OS), and disease?free survival(DFS) were analyzed.Results: The protein expression levels of ASPP2 and P53 were significantly higher in cancerous tissues than in paired noncancerous tissues(P < 0.001), whereas the expression levels of ASPP1 in the two groups were similar. In ESCCs, ASPP1 expression was significantly associated with histological differentiation(P = 0.002) and invasive depth(P = 0.014); ASPP2 expression was associated with age(P = 0.029) and histological differentiation(P < 0.001); and P53 expression was associated with age(P and P53 expression. Survival an= 0.021) and tumor size(P alysis revealed that high AS= 0.040). No correlations were found between ASPP1, ASPP2,PP2 expression was significantly associated with increased 5?year OS(P = 0.001) and DFS rates(P ate of ESCC patients(= 0.010) and that high P53 expression was significantly associated with a reduced 5?year DFS rP atio(HR): 0.541, 9= 0.015). Multivariate Cox analysis indicated that ASPP2 was an inde?pendent predictor of OS [hazard r5% confidence interval(CI) 0.363–0.804] and DFS(HR: 0.599, 95% CI 0.404–0.888) of ESCC patients and that P53 was an independent predictor of DFS(HR: 2.161, 95% CI 1.100–4.245).Conclusions: ASPP1 might be involved in the progression of ESCC, and ASPP2 was a potential prognostic biomarker of ESCC and should be evaluated in future studies. 展开更多
关键词 Apoptosis-stimulating protein of P531 and 2 P53 Prognosis Esophageal squamous cell carcinoma
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An effective oxygen electrode based on Ir0.6Sn0.4O2 for PEM water electrolyzers 被引量:2
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作者 Guang Jiang Hongmei Yu +5 位作者 Jinkai Hao jun chi Zhixuan Fan Dewei Yao Bowen Qin Zhigang Shao 《Journal of Energy Chemistry》 SCIE EI CAS CSCD 2019年第12期23-28,共6页
An effective oxygen evolution electrode with Ir0.6Sn0.4O2 was designed for proton exchange membrane(PEM)water electrolyzers.The anode catalyst layer exhibits a jagged structure with smaller particles and pores,which p... An effective oxygen evolution electrode with Ir0.6Sn0.4O2 was designed for proton exchange membrane(PEM)water electrolyzers.The anode catalyst layer exhibits a jagged structure with smaller particles and pores,which provide more active sites and mass transportation channels.The prepared IrSn electrode showed a cell voltage of 1.96 V at 2.0 A cm^-2 with Ir loading as low as 0.294 mg cm^-2.Furthermore,Ir Sn electrode with different anode catalyst loadings was investigated.The IrS n electrode indicates higher mass current and more stable cell voltage than the commercial Ir Black electrode at low loading. 展开更多
关键词 PEM water electrolyzer OER electrode Low Ir loading
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PHDs-seq:a large-scale phenotypic screening method for drug discovery through parallel multi-readout quantification
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作者 jun Li jun chi +5 位作者 Yang Yang Zhongya Song Yong Yang Xin Zhou Yang Liu Yang Zhao 《Cell Regeneration》 CAS 2023年第1期204-216,共13页
High-throughput phenotypic screening is a cornerstone of drug development and the main technical approach for stem cell research.However,simultaneous detection of activated core factors responsible for cell fate deter... High-throughput phenotypic screening is a cornerstone of drug development and the main technical approach for stem cell research.However,simultaneous detection of activated core factors responsible for cell fate determination and accurate assessment of directional cell transition are difficult using conventional screening methods that focus on changes in only a few biomarkers.The PHDs-seq(Probe Hybridization based Drug screening by sequencing)platform was developed to evaluate compound function based on their transcriptional effects in a wide range of signature biomarkers.In this proof-of-concept demonstration,several sets of markers related to cell fate determination were profiled in adipocyte reprogramming from dermal fibroblasts.After validating the accuracy,sensitivity and reproducibility of PHDs-seq data in molecular and cellular assays,a panel of 128 signalling-related compounds was screened for the ability to induce reprogramming of keloid fibroblasts(KF)into adipocytes.Notably,the potent ATP-competitive VEGFR/PDGFR inhibitor compound,ABT869,was found to promote the transition from fibroblasts to adipocytes.This study highlights the power and accuracy of the PHDs-seq platform for high-throughput drug screening in stem cell research,and supports its use in basic explorations of the molecular mechanisms underlying disease development. 展开更多
关键词 High-throughput screening PHDs-seq Adipocyte reprogramming ABT869
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Spirolindemers A and B,Lindenane Sesquiterpenoid Oligomers Equipped with Oxaspiro[4.5]decane from Chloranthus henryi 被引量:5
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作者 Jixin Li jun chi +6 位作者 Pengfei Tang Yunpeng Sun Weijia Lu Wenjun Xu Yongyue Wang jun Luo Lingyi Kong 《Chinese Journal of Chemistry》 SCIE CAS CSCD 2022年第5期603-608,共6页
Spirolindemers A and B,unprecedented lindenane sesquiterpenoid dimer(1)and trimer(2)equipped with oxaspiro[4.5]decane unit,were discovered from the medicinal plant Chloranthus henryi.Their structures including absolut... Spirolindemers A and B,unprecedented lindenane sesquiterpenoid dimer(1)and trimer(2)equipped with oxaspiro[4.5]decane unit,were discovered from the medicinal plant Chloranthus henryi.Their structures including absolute configurations were achieved by HRMS,NMR,ECD,X-ray diffraction analyses,and quantum chemical calculations.Biogenetically,hetero-and homo-Diels-Alder additions may dominate the formation of oxaspiro[4.5]decane and spiro[4.5]decane skeletons,respectively.Compound 1 showed anti-inflammatory activity by inhibiting the expression of iNOS and COX-2. 展开更多
关键词 Lindenane sesquiterpenoid oligomers Chloranthus henryi Natural products Structure elucidation Biological activity
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Sarcaglarols A-D, Lindenane-Monoterpene Heterodimers from Sarcandra glabra Based on Molecular Networks 被引量:3
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作者 Yongyue Wang Zhirong Cui +7 位作者 jun chi Pengfei Tang Meihui Zhang Jixin Li Yongyi Li Hao Zhang jun Luo Lingyi Kong 《Chinese Journal of Chemistry》 SCIE CAS CSCD 2021年第1期129-136,共8页
Sarcaglarols A-D(1-4),two pairs of lindenane-monoterpene heterodimers fused by a 1,2-dioxane moiety,were discovered and isolated from the leaves of Sarcandra glabra guided by MS/MS molecular networking-based strategy.... Sarcaglarols A-D(1-4),two pairs of lindenane-monoterpene heterodimers fused by a 1,2-dioxane moiety,were discovered and isolated from the leaves of Sarcandra glabra guided by MS/MS molecular networking-based strategy.Their planar structures,absolute configurations of basic skeleton and flexible polyhydric side chain were established by analysis of HRESIMS,NMR spectroscopic data,ECD spectrum,and the X-ray diffraction study of isopropylidene derivatives.An intermolecular[2+2+2]cycloaddition may play a key role in the biosynthesis pathway of the 1,2-dioxane moiety fused lindenane-monoterpene heterodimer skeleton,which can be recognized as the biogenetic precursors of our previous reported lindenane-normonoterpene conjugates.In addition,compounds 1,3 and 4 exhibited moderate inhibitory effects of lipid accumulation in free fatty acid-exposed L02 cells. 展开更多
关键词 Sarcandra glabra Molecular networks Natural products Structural elucidation PEROXIDES
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