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Templated synthesis of transition metal phosphide electrocatalysts for oxygen and hydrogen evolution reactions 被引量:4
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作者 Rose Anne Acedera Alicia Theresse Dumlao +4 位作者 DJ Donn Matienzo Maricor Divinagracia Julie Anne del Rosario Paraggua Po-Ya Abel Chuang Joey Ocon 《Journal of Energy Chemistry》 SCIE EI CAS CSCD 2024年第2期646-669,I0014,共25页
Transition metal phosphides(TMPs)have been regarded as alternative hydrogen evolution reaction(HER)and oxygen evolution reaction(OER)catalysts owing to their comparable activity to those of noble metal-based catalysts... Transition metal phosphides(TMPs)have been regarded as alternative hydrogen evolution reaction(HER)and oxygen evolution reaction(OER)catalysts owing to their comparable activity to those of noble metal-based catalysts.TMPs have been produced in various morphologies,including hollow and porous nanostructures,which are features deemed desirable for electrocatalytic materials.Templated synthesis routes are often responsible for such morphologies.This paper reviews the latest advances and existing challenges in the synthesis of TMP-based OER and HER catalysts through templated methods.A comprehensive review of the structure-property-performance of TMP-based HER and OER catalysts prepared using different templates is presented.The discussion proceeds according to application,first by HER and further divided among the types of templates used-from hard templates,sacrificial templates,and soft templates to the emerging dynamic hydrogen bubble template.OER catalysts are then reviewed and grouped according to their morphology.Finally,prospective research directions for the synthesis of hollow and porous TMP-based catalysts,such as improvements on both activity and stability of TMPs,design of environmentally benign templates and processes,and analysis of the reaction mechanism through advanced material characterization techniques and theoretical calculations,are suggested. 展开更多
关键词 OER HER transition metal phosphide Templated synthesis ELECTROCATALYSTS
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Recent advances in transition metal phosphide materials:Synthesis and applications in supercapacitors 被引量:1
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作者 Ge Li Yu Feng +3 位作者 Yi Yang Xiaoliang Wu Xiumei Song Lichao Tan 《Nano Materials Science》 EI CAS CSCD 2024年第2期174-192,共19页
Supercapacitors(SCs)are considered promising energy storge systems because of their outstanding power density,fast charge and discharge rate and long-term cycling stability.The exploitation of cheap and efficient elec... Supercapacitors(SCs)are considered promising energy storge systems because of their outstanding power density,fast charge and discharge rate and long-term cycling stability.The exploitation of cheap and efficient electrode materials is the key to improve the performance of supercapacitors.As the battery-type materials,transition metal phosphides(TMPs)possess high theoretical specific capacity,good electrical conductivity and superior structural stability,which have been extensively studied to be electrode materials for supercapacitors.In this review,we summarize the up-to-date progress on TMPs materials from diversified synthetic methods,diverse nanostructures and several prominent TMPs and their composites in application of supercapacitors.In the end,we also propose the remaining challenges toward the rational discovery and synthesis of high-performance TMP electrodes materials for energy storage. 展开更多
关键词 transition metal phosphides Cobalt phosphide Nickel phosphides Electrode materials SUPERCAPACITOR
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Activating Ru in the pyramidal sites of Ru_(2)P-type structures with earth-abundant transition metals for achieving extremely high HER activity while minimizing noble metal content
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作者 Sayed M.El-Refaei Patrícia A.Russo +4 位作者 Thorsten Schultz Zhe-Ning Chen Patrick Amsalem Norbert Koch Nicola Pinna 《Carbon Energy》 SCIE EI CAS CSCD 2024年第9期80-92,共13页
Rational design of efficient pH-universal hydrogen evolution reaction catalysts to enable large-scale hydrogen production via electrochemical water splitting is of great significance,yet a challenging task.Herein,Ru a... Rational design of efficient pH-universal hydrogen evolution reaction catalysts to enable large-scale hydrogen production via electrochemical water splitting is of great significance,yet a challenging task.Herein,Ru atoms in the Ru_(2)P structure were replaced with M=Co,Ni,or Mo to produce M_(2-x)Ru_(x)P nanocrystals.The metals show strong site preference,with Co and Ni occupying the tetrahedral sites and Ru the square pyramidal sites of the CoRuP and NiRuP Ru_(2)P-type structures.The presence of Co or Ni in the tetrahedral sites leads to charge redistribution for Ru and,according to density functional theory calculations,a significant increase in the Ru d-band centers.As a result,the intrinsic activity of CoRuP and NiRuP increases considerably compared to Ru_(2)P in both acidic and alkaline media.The effect is not observed for MoRuP,in which Mo prefers to occupy the pyramidal sites.In particular,CoRuP shows state-of-the-art activity,outperforming Ru_(2)P with Pt-like activity in 0.5 M H_(2)SO_(4)(η10=12.3 mV;η100=52 mV;turnover frequency(TOF)=4.7 s^(-1)).It remains extraordinarily active in alkaline conditions(η10=12.9 mV;η100=43.5 mV)with a TOF of 4.5 s^(-1),which is 4x higher than that of Ru_(2)P and 10x that of Pt/C.Further increase in the Co content does not lead to drastic loss of activity,especially in alkaline medium,where,for example,the TOF of Co_(1.9)Ru_(0.1)P remains comparable to that of Ru_(2)P and higher than that of Pt/C,highlighting the viability of the adopted approach to prepare cost-efficient catalysts. 展开更多
关键词 electrocatalysis ruthenium phosphide transition metal phosphonates
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Metal-organic frameworks derived transition metal phosphides for electrocatalytic water splitting 被引量:5
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作者 Li-Ming Cao Jia Zhang +2 位作者 Li-Wen Ding Zi-Yi Du Chun-Ting He 《Journal of Energy Chemistry》 SCIE EI CAS CSCD 2022年第5期494-520,共27页
It is critical to synthesize high-efficiency electrocatalysts to boost the performance of water splitting to meet the requirements of industrial applications. Metal-organic frameworks(MOFs) can function as ideal molec... It is critical to synthesize high-efficiency electrocatalysts to boost the performance of water splitting to meet the requirements of industrial applications. Metal-organic frameworks(MOFs) can function as ideal molecular platforms for the design of highly reactive transition metal phosphides(TMPs), a kind of candidates for high-efficiently electrocatalytic water splitting. The intrinsic activity of the electrocatalysts can be greatly improved via modulating the electronic structure of the catalytic center through the MOF precursors/templates. Moreover, the carbon layer converted in-situ by the organic ligands can not only protect the TMPs from being degraded in the harsh electrochemical environments, but also avoid agglomeration of the catalysts, thereby promoting their activities and stabilities. Furthermore,heteroatom-containing ligands can incorporate N, S or P, etc. atoms into the carbon matrixes after conversion, regulating the coordination microenvironments of the active centers as well as their electronic structures. In this review, we first summarized the latest developments in MOF-derived TMPs by the unique advantages in metal, organic ligand, and morphology regulations for electrocatalytic water splitting. Secondly, we concluded the critical scientific issues currently facing for designing state-of-the-art TMP-based electrocatalysts. Finally, we presented an outlook on this research area, encompassing electrocatalyst construction, catalytic mechanism research, etc. 展开更多
关键词 metal-organic framework transition metal phosphide Water splitting ELECTROCATALYST Electronic structure
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Thioetherification of isoprene and butanethiol on transition metal phosphides 被引量:4
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作者 Tianyu Ren Mingfeng Li +1 位作者 Yang Chu Jixiang Chen 《Journal of Energy Chemistry》 SCIE EI CAS CSCD 2018年第3期930-939,共10页
Thioetherification between mercaptan and diolefin is an efficient process to remove mercaptans in FCC gasoline at mild condition, during which the selective hydrogenation of diolefin to monoolefin is also expected. He... Thioetherification between mercaptan and diolefin is an efficient process to remove mercaptans in FCC gasoline at mild condition, during which the selective hydrogenation of diolefin to monoolefin is also expected. Here, Si O2 supported transition metal(Fe, Co, Ni, Mo and W) phosphides were tested for the thioetherification of isoprene and butanethiol on a fixed-bed reactor at 120℃ and 1.5 MPa H2, and their structure before and after reaction was characterized by means of XRD, HRTEM, N2 sorption, CO chemisorption, NH3-TPD, XPS and TG. It was found that, among different metal phosphides, Mo P/Si O2 showed the best performance, and the optimal nominal Mo P loading was 25%. Apart from the nature of metal, the density of metal and acid sites determined the catalyst performance. Metal site was mainly responsible for hydrogenation of isoprene, while acid site dominantly contributed to the thioetherification and the polymerization of olefins. Moreover, a balance between metallic and acidic functions is required to arrive at a desired performance. Excessive metal sites or acid sites led to the over-hydrogenation of isoprene or the severe polymerization of olefins, respectively. 25%Mo P/Si O2 was tested for 37 h time on stream, and butanethiol conversion maintained at 100%; although isoprene conversion remarkably decreased, the selectivity to isopentenes exceeded 80% after reaction for 11 h. We suggest that the deactivation of Mo P/Si O2 is mainly ascribed to the butanethiol poisoning and the carbonaceous deposit, especially the former. 展开更多
关键词 transition metal phosphides Bifunctional catalyst Thioetherification Selective hydrogenation Catalyst deactivation
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Multicomponent transition metal phosphide for oxygen evolution 被引量:4
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作者 Lihua Liu Ning Li +2 位作者 Jingrui Han Kaili Yao Hongyan Liang 《International Journal of Minerals,Metallurgy and Materials》 SCIE EI CAS CSCD 2022年第3期503-512,共10页
Transition metal phosphides(TMPs)have exhibited decent performance in an oxygen evolution reaction(OER),which is a kinetic bottleneck in many energy storages and conversion systems.Most reported catalysts are composed... Transition metal phosphides(TMPs)have exhibited decent performance in an oxygen evolution reaction(OER),which is a kinetic bottleneck in many energy storages and conversion systems.Most reported catalysts are composed of three or fewer metallic components.The inherent complexity of multicomponent TMPs with more than four metallic components hinders their investigation in rationally designing the structure and,more importantly,comprehending the component-activity correlation.Through hydrothermal growth and subsequent phosphor-ization,we reported a facile strategy for combining TMPs with tunable elemental compositions(Ni,Fe,Mn,Co,Cu)on a two-dimensional ti-tanium carbide(MXene)flake.The obtained TMPs/MXene hybrid nanostructures demonstrate homogeneously distributed elements.They ex-hibit high electrical conductivity and strong interfacial interaction,resulting in an accelerated reaction kinetics and long-term stability.The res-ults of different component catalysts’OER performance show that NiFeMnCoP/MXene is the most active catalyst,with a low overpotential of 240 mV at 10 mA·cm−2,a small Tafel slope of 41.43 mV·dec−1,and a robust long-term electrochemical stability.According to the electrocata-lytic mechanism investigation,the enhanced NiFeMnCoP/MXene OER performance is due to the strong synergistic effect of the multi-ele-mental composition.Our work,therefore,provides a scalable synthesis route for multi-elemental TMPs and a valuable guideline for efficient MXene-supported catalysts design. 展开更多
关键词 multicomponent transition metal phosphides electrocatalytic oxygen evolution reaction MXene synergistic effect
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Heterostructured bimetallic phosphide nanowire arrays with latticetorsion interfaces for efficient overall water splitting 被引量:1
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作者 Hua Zhang Hongyi Li +7 位作者 Yintang Zhou Fang Tan Ruijie Dai Xijun Liu Guangzhi Hu Laiming Jiang Anran Chen Renbing Wu 《Journal of Energy Chemistry》 SCIE EI CAS CSCD 2023年第2期420-427,I0011,共9页
Designing cost-effective and high-efficiency electrocatalysts is critical to the water splitting performance during hydrogen generation.Herein,we have developed Fe_(2)P-Co_(2)P heterostructure nanowire arrays with exc... Designing cost-effective and high-efficiency electrocatalysts is critical to the water splitting performance during hydrogen generation.Herein,we have developed Fe_(2)P-Co_(2)P heterostructure nanowire arrays with excellent lattice torsions and grain boundaries for highly efficient water splitting.According to the microstructural investigations and theoretical calculations,the lattice torsion interface not only contributes to the exposure of more active sites but also effectively tunes the adsorption energy of hydrogen/oxygen intermediates via the accumulation of charge redistribution.As a result,the Fe_(2)P-Co_(2)P heterostructure nanowire array exhibits exceptional bifunctional catalytic activity with overpotentials of 65 and 198 mV at 10 mA cm^(-2) for hydrogen and oxygen evolution reactions,respectively.Moreover,the Fe_(2)P-Co_(2)P/NF-assembled electrolyzer can deliver 10 mA cm^(-2) at an ultralow voltage of1.51 V while resulting in a high solar-to-hydrogen conversion efficiency of 19.8%in the solar-driven water electrolysis cell. 展开更多
关键词 transition metal phosphide Lattice torsion Heterogeneous interfaces Water splitting Theoretical calculation
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富磷金属磷化物电催化性能的研究进展
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作者 邓朝芳 张延 +4 位作者 杨起美 旦开杰 姜文 郭熙川 万财文 《化工设计通讯》 CAS 2024年第7期62-64,共3页
近年来,电催化分解水技术越来越得到广泛关注。提高速率的关键是要找到高效的电催化剂,其中过渡金属磷化物表现出优秀的催化活性和长期稳定性。富磷化合物具有催化活性较大但导电性较差的特点,在实际应用中可合理调控磷化物的电子结构,... 近年来,电催化分解水技术越来越得到广泛关注。提高速率的关键是要找到高效的电催化剂,其中过渡金属磷化物表现出优秀的催化活性和长期稳定性。富磷化合物具有催化活性较大但导电性较差的特点,在实际应用中可合理调控磷化物的电子结构,以获得导电性、催化效能俱佳的电催化剂。综述了近年来电解水析氢的研究进展,重点集中在富磷金属磷化物的研究上,阐述了其合成方法与微结构调控策略,及其在当前电催化材料研究领域面临的挑战和未来的发展前景。 展开更多
关键词 过渡金属磷化物 富磷磷化物 电解水 电催化性能 无机化学材料合成
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金属磷化物在电解水制氢中的应用研究进展 被引量:1
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作者 高岩峰 贾少培 +6 位作者 刘奇鹏 黄权 张茜 李其松 王志新 成晓哲 穆云超 《工业催化》 CAS 2024年第1期1-13,共13页
电解水被认为是目前最有前途的制氢方法之一。基于商用贵金属基催化剂成本高和储量有限的情况,开发低成本、高性能的电催化剂是实现电解水制氢产业化的关键。过渡金属磷化物因具有独特的物化性质和高催化活性而被广泛关注,但导电性和活... 电解水被认为是目前最有前途的制氢方法之一。基于商用贵金属基催化剂成本高和储量有限的情况,开发低成本、高性能的电催化剂是实现电解水制氢产业化的关键。过渡金属磷化物因具有独特的物化性质和高催化活性而被广泛关注,但导电性和活性位点密度的不足限制了其在工业化制氢中的应用。首先阐述电解水析氢的机理及过渡金属磷化物的重要作用。然后从单金属磷化物、双金属磷化物、改性金属磷化物和结构调控过渡金属磷化物4个方面分析不同种类的过渡金属磷化物以及提升其催化性能的途径,并比较了当前过渡金属磷化物的常用制备方法。最后总结提升催化性能的主要策略,展望过渡金属磷化物未来的机遇和挑战。期望本综述有助于过渡金属磷化物电催化剂的设计开发与应用。 展开更多
关键词 能源化学 电解水制氢 过渡金属磷化物 结构性能优化 电催化能源转换材料
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仙人掌状的NC/Co_(x)P自支撑电极用于盐水电解实现高效稳定析氢
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作者 陈续 赵金玉 +1 位作者 张文盛 王晓敏 《新型炭材料(中英文)》 SCIE EI CAS CSCD 北大核心 2024年第1期152-163,共12页
设计高效、稳定的析氢催化剂是盐水电解技术发展的必然要求。本文通过原位生长策略在泡沫镍(NF)上生长NC/Co_(x)P@NF催化剂,它由Co_(x)P纳米线阵列与氮掺杂碳纳米片(NC)交替生长组成。在制备过程中,Co(OH)_(2)纳米线通过内源Co^(2+)与2... 设计高效、稳定的析氢催化剂是盐水电解技术发展的必然要求。本文通过原位生长策略在泡沫镍(NF)上生长NC/Co_(x)P@NF催化剂,它由Co_(x)P纳米线阵列与氮掺杂碳纳米片(NC)交替生长组成。在制备过程中,Co(OH)_(2)纳米线通过内源Co^(2+)与2-甲基咪唑的溶解配位作用在NF上原位转化为Co-MOF纳米片。仙人掌状的微观结构使NC/CoxP@NF暴露出丰富的活性位点和离子运输通道,促进了HER催化反应动力学。此外,在分级多孔的NC/CoxP@NF中,纳米线和自支撑纳米片交替生长,进一步增强了材料的结构稳定性。最重要的是,表面聚阴离子(磷酸盐)和NC纳米片保护层的形成提高了催化剂的耐腐性能。最终,NC/CoxP@NF-10表现出优异的析氢性能,在1.0 mol L^(-1)KOH和1.0 mol L^(-1)KOH+0.5 mol L^(-1)NaCl条件下,分别需要107和133 mV的过电位达到10 mA cm^(-2)的电流密度。 展开更多
关键词 析氢反应 纳米结构 过渡金属磷化物 耐氯腐蚀 盐水分解
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A new insight into the promoting effects of transition metal phosphides in methanol electrooxidation 被引量:3
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作者 Junjie Ding Shaojie Jing +8 位作者 Changqing Yin Chaogang Ban Kaiwen Wang Xue Liu Youyu Duan Yuxin Zhang Guang Han Liyong Gan Jinsong Rao 《Chinese Chemical Letters》 SCIE CAS CSCD 2023年第6期200-205,共6页
The construction of highly active catalysts for methanol oxidation reaction(MOR)is central to direct methanol fuel cells.Tremendous progress has been made in transition metal phosphides(TMPs)based catalysts.However,TM... The construction of highly active catalysts for methanol oxidation reaction(MOR)is central to direct methanol fuel cells.Tremendous progress has been made in transition metal phosphides(TMPs)based catalysts.However,TMPs would be partially damaged and transformed into new substances(e.g.,Pt-M-P composite,where M represents a second transition metal)during Pt deposition process.This would pose a large obstacle to the cognition of the real promoting effects of TMPs in MOR.Herein,Co_(2)P co-catalysts(Pt-P/Co_(2)P@NPC,where NPC stands for N and P co-doped carbon)and Pt-Co-P composite catalysts(Pt-CoP/NPC)were controllably synthesized.Electrocatalysis tests show that the Pt-Co-P/NPC exhibits superior MOR activity as high as 1016 m A/mg_(Pt),significantly exceeding that of Pt-P/Co_(2)P@NPC(345 m A/mg_(Pt)).This result indicates that the promoting effect is ascribed primarily to the resultant Pt-Co-P composite,in sharply contrast to previous viewpoint that Co_(2)P itself improves the activity.Further mechanistic studies reveal that Pt-Co-P/NPC exhibits much stronger electron interaction and thus manifesting a remarkably weaker CO absorption than Pt-P/Co_(2)P@NPC and Pt/C.Moreover,Pt-Co-P is also more capable of producing oxygen-containing adsorbate and thus accelerating the removal of surface-bonded CO^(*),ultimately boosting the MOR performance. 展开更多
关键词 Promoting effect transition metal phosphides Pt-Co-P composite Catalytic mechanisms Methanol oxidation reaction
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磷化铁/生物碳复合材料活化亚硫酸盐降解橙黄Ⅱ的研究
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作者 高子航 蔡明锦 王雅博 《现代化工》 CAS CSCD 北大核心 2024年第8期115-120,共6页
水污染严重影响生态环境和人类健康,染料废水是其中的典型代表。利用酵母细胞作磷源和碳源,通过共沉淀-缺氧热解制备了磷化铁/生物碳复合材料,并将其作为高级氧化反应的催化剂,活化亚硫酸盐降解水体污染物橙黄Ⅱ。材料表征结果表明,磷... 水污染严重影响生态环境和人类健康,染料废水是其中的典型代表。利用酵母细胞作磷源和碳源,通过共沉淀-缺氧热解制备了磷化铁/生物碳复合材料,并将其作为高级氧化反应的催化剂,活化亚硫酸盐降解水体污染物橙黄Ⅱ。材料表征结果表明,磷化铁的主要组成成分为Fe_(2)P和Fe_(3)P。在较优的催化条件下,经120 min吸附和催化联合处理,模拟废水中10 mg/L的橙黄Ⅱ可以被完全去除。催化反应机理分析表明,磷化铁/生物碳复合材料通过活化亚硫酸盐产生硫酸根自由基和羟基自由基,进而实现了橙黄Ⅱ的氧化降解。 展开更多
关键词 高级氧化技术 过渡金属磷化物 生物碳 染料废水 降解
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过渡金属纳米异质材料在超级电容器中的应用
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作者 陈晓敏 徐丹 +3 位作者 魏影 周少博 李婷婷 蒋继波 《应用技术学报》 2024年第3期266-275,315,共11页
超级电容器因其具有高功率密度、快速充放电性能、超长的循环寿命的优点被广泛应用。过渡金属磷化物(TMPs)和层状双金属氢氧化物(LDHs)作为电极材料,具有大比表面积和良好的电化学活性等优点,但TMPs的倍率性能和LDHs导电性较差。将TMPs... 超级电容器因其具有高功率密度、快速充放电性能、超长的循环寿命的优点被广泛应用。过渡金属磷化物(TMPs)和层状双金属氢氧化物(LDHs)作为电极材料,具有大比表面积和良好的电化学活性等优点,但TMPs的倍率性能和LDHs导电性较差。将TMPs和LDHs复合形成异质结构来实现二者的协同效应,从而能够提高电容器的功率密度和循环寿命。综述了TMPs、LDHs及其构建的异质结电极材料的制备方法,与其在超级电容器方面的应用,并展望了其今后的研究发展方向和未来的应用前景。 展开更多
关键词 过渡金属磷化物 层状双金属氢氧化物 异质结构 超级电容器
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Trimetallic synergistic optimization of 0D NiCoFe-P QDs anchoring on 2D porous carbon for efficient electrocatalysis and high-energy supercapacitor 被引量:2
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作者 Ruiqi Liu Xue-Rong Shi +4 位作者 Yi Wen Xiaoxuan Shao Chen Su Jing Hu Shusheng Xu 《Journal of Energy Chemistry》 SCIE EI CAS CSCD 2022年第11期149-158,I0006,共11页
Developing multi-functional and low-cost noble-metal-free catalysts such as transition metal phosphides(TMPs)to replace noble-metal is of practical significance for energy conversion and storage.However,the low-durabi... Developing multi-functional and low-cost noble-metal-free catalysts such as transition metal phosphides(TMPs)to replace noble-metal is of practical significance for energy conversion and storage.However,the low-durability and the agglomeration phenomenon during the electrochemical process limit their practical applications.Herein,using metal–organic frameworks(MOFs)as the precursor and a combined strategy of gradient temperature calcination and thermal phosphorization,a 0D/2D heterostructure of NiCoFe-P quantum dots(QDs)anchored on porous carbon was successfully developed as highly efficient electrode materials for overall water splitting and supercapacitors.Owing to this distinctive 0D/2D heterostructure and the synergistic effect of multi-metallic TMPs,the NiCoFe-P/C exhibits excellent electrocatalytic activity and durability of HER(87 mV at 10 mA cm^(-2))and OER(257 mV at 100 mA cm^(-2))in the KOH electrolyte.When NiCoFe-P/C is used as the two electrodes of electrolyzed water,only 1.55 V can drive the current density to 10 m A cm^(-2).At the same time,our NiCoFe-P/C possessed extraordinary property for charge storage.In particular,an ultra-high energy density of 100.8 Wh kg^(-1) was achieved at a power density of 900.0 W kg^(-1) for our assembled hybrid supercapacitor device NiCoFe-P/C(2:1)//activated carbon(AC).This work may open a potential way for the design of 0D/2D hybrid multifunctional nanomaterials based on TMPs QDs. 展开更多
关键词 metal-organic frameworks transition metal phosphide quantum dots 0D/2D heterostructure Overall water splitting SUPERCAPACITOR First-principle calculations
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高价态W掺杂对NiFe磷化物全分解水制氢催化活性影响的研究 被引量:2
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作者 张依擎 梁俊辉 +5 位作者 范浩阳 陈达 陈华予 黄岳祥 姚鑫 秦来顺 《人工晶体学报》 CAS 北大核心 2023年第8期1491-1499,共9页
近年来,通过光伏辅助电催化(PV-EC)分解水制备“绿氢”成为实现碳中和目标的关键。然而,普通电解水催化剂不能满足PV-EC系统中较高的太阳能到氢能(STH)转换效率的需求。因此,获取价格低廉、低反应过电势的电催化剂材料极为重要。本文选... 近年来,通过光伏辅助电催化(PV-EC)分解水制备“绿氢”成为实现碳中和目标的关键。然而,普通电解水催化剂不能满足PV-EC系统中较高的太阳能到氢能(STH)转换效率的需求。因此,获取价格低廉、低反应过电势的电催化剂材料极为重要。本文选取具有高价态的过渡金属W作为掺杂源,采用一步电沉积方法制备出NiFeW三元金属磷化物。通过一系列的表征发现,NiFeW磷化物电催化剂表现出优异的析氢反应(HER)和析氧反应(OER)活性,且作为双功能电催化剂时,在10 mA/cm^(2)电流密度下W掺杂后样品的过电势降低了51 mV。使用NiFeW磷化物作为双功能电催化剂和太阳能电池(a-Si∶H/a-SiGe∶H/a-SiGe∶H)作为驱动源,PV-EC器件实现了超过7%的理论STH转换效率,对推动太阳能分解水制氢装置的实际应用具有重要意义。 展开更多
关键词 电解水制氢 双功能电催化剂 光伏辅助电催化 太阳能电池 过渡金属磷化物 掺杂
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化学镀法制备NiCoP/rGO/NF高效电解水析氢催化剂 被引量:1
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作者 张亚娟 徐惠 +1 位作者 胡贝 史星伟 《化工进展》 EI CAS CSCD 北大核心 2023年第8期4275-4282,共8页
电解水制氢是一项制取绿色氢能的重要技术,而开发具有低成本、高活性的催化剂作为电极材料是当前的研究重点。本文以负载石墨烯的泡沫镍(rGO/NF)为基底,应用化学镀法制备了NiCoP/rGO/NF新型析氢(HER)电解水催化剂。比较NiCoP/NF和引入... 电解水制氢是一项制取绿色氢能的重要技术,而开发具有低成本、高活性的催化剂作为电极材料是当前的研究重点。本文以负载石墨烯的泡沫镍(rGO/NF)为基底,应用化学镀法制备了NiCoP/rGO/NF新型析氢(HER)电解水催化剂。比较NiCoP/NF和引入石墨烯后的NiCoP/rGO/NF的电催化性能。三电极体系的测试结果表明,在1mol/L KOH电解液中,在电流密度为10mA/cm2时,NiCoP/rGO/NF电极具有最优的过电位98mV。塔菲尔斜率(Tafel)、循环伏安(CV)和电化学阻抗(EIS)分析表明,NiCoP/rGO/NF电极优异的HER性能是快速反应动力学、高效电化学活性比表面积(ECSA)和小反应电阻(Rct)综合作用的结果。结构测试表明:NiCoP均匀沉积于rGO和泡沫镍表面,并且rGO形成的三维网络结构增加了催化剂比表面积,暴露出丰富的活性边缘,催化剂中Ni—P/Co—P键的形成是HER性能提升的关键。 展开更多
关键词 电化学 制氢 催化剂 化学镀 过渡金属磷化物 三维石墨烯
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MoP-NC纳米球负载Pt纳米粒子用于高效甲醇电解 被引量:1
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作者 李萌 杨甫林 +2 位作者 常进法 Alex Schechter 冯立纲 《物理化学学报》 SCIE CAS CSCD 北大核心 2023年第9期99-108,共10页
实现绿色甲醇电解制氢需要高效的双功能催化剂。本文采用热处理结合乙二醇还原法成功制备了MoP-NC纳米球负载的超细Pt纳米粒子(平均粒径为2.53 nm)复合催化剂(Pt/MoP-NC)用于高效甲醇电解制氢。MoP-NC纳米球不仅能提高Pt纳米粒子的分散... 实现绿色甲醇电解制氢需要高效的双功能催化剂。本文采用热处理结合乙二醇还原法成功制备了MoP-NC纳米球负载的超细Pt纳米粒子(平均粒径为2.53 nm)复合催化剂(Pt/MoP-NC)用于高效甲醇电解制氢。MoP-NC纳米球不仅能提高Pt纳米粒子的分散性并且增强Pt的抗中毒能力。电化学测试表明Pt/MoP-NC催化剂在酸性甲醇氧化反应(MOR)和析氢反应(HER)中具有较高的催化性能;其中,MOR的正向扫描峰值电流密度为90.7 m A·cm^(-2),是商业Pt/C催化剂的3.2倍,在10 mA·cm^(-2)的电流密度下,HER的过电位低至30 m V,与商业Pt/C接近。由Pt/MoP-NC||Pt/MoP-NC组装的两电极电解槽驱动10 mA·cm^(-2)的电流密度仅需要0.67 V的电压,比相同条件下电解水的电压低1.02 V,大大降低了能量输入。Pt/MoP-NC的高催化性能主要来源于Pt活性中心与相邻层状多孔球形结构的MoP-NC载体之间电子效应及配体效应引起的抗一氧化碳中毒能力的提升和含氧物种的容易生成。 展开更多
关键词 电子效应 甲醇电解 过渡金属磷化物 铂基催化剂 双功能催化剂
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Interfacial electronic coupling of V-doped Co_(2)P with high-entropy MXene reduces kinetic energy barrier for efficient overall water splitting 被引量:1
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作者 Wansen Ma Zeming Qiu +4 位作者 Jinzhou Li Liwen Hu Qian Li Xuewei Lv Jie Dang 《Journal of Energy Chemistry》 SCIE EI CAS CSCD 2023年第10期301-309,I0009,共10页
Developing efficient,low-cost non-noble metal-based bifunctional catalysts to achieve excellent hydrogen evolution reaction(HER)and oxygen evolution reaction(OER)kinetics in alkaline media is challenging but very mean... Developing efficient,low-cost non-noble metal-based bifunctional catalysts to achieve excellent hydrogen evolution reaction(HER)and oxygen evolution reaction(OER)kinetics in alkaline media is challenging but very meaningful.However,improving the electronic structure of the catalyst to optimize the adsorption of intermediates and reduce the reaction energy barrier is the key to improve the reaction efficiency.Herein,a V-doped Co_(2)P coupled with high-entropy MXene heterostructure catalyst(V-Co_(2)P@HE)was prepared by a two-step electrodeposition and controlled phosphorization process.The analyses of X-ray absorption spectroscopy,X-ray photoelectron spectroscopy and theoretical calculations jointly show that the introduction of V and the strong electron coupling between the two components optimize the adsorption energy of water molecules and reaction intermediates.Benefiting from the abundant active sites and optimizing intermediate adsorption energy and heterogeneous interface electronic structure,V-Co_(2)P@HE has excellent HER and OER activity and long-term stability under alkaline condition.In particular,when assembled as cathode and anode,the bifunctional V-Co_(2)P@HE catalyst can drive a current density of 10 mA cm^(-2)with only 1.53 V.This work provides new strategies for the application of highentropy MXene and the design of novel non-noble metal-based bifunctional electrolytic water catalysts. 展开更多
关键词 transition metal phosphides High-entropy MXene HER OER
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过渡金属磷硫化物加氢精制及电催化析氢反应性能研究
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作者 胡洋 李翔 +3 位作者 盛强 尚森森 张晨曦 邹洁 《现代化工》 CAS CSCD 北大核心 2023年第S02期129-135,共7页
以硫脲为固体硫化剂、相应过渡金属磷酸盐为前驱体,采用程序升温还原的方法制备了Co_(2)P、MoP和WP的磷硫化物。结果表明,添加硫脲后制备的催化剂结晶度和粒度都有所降低。在酸性条件下电催化析氢反应(HER)中,磷硫化物活性随前驱体中硫... 以硫脲为固体硫化剂、相应过渡金属磷酸盐为前驱体,采用程序升温还原的方法制备了Co_(2)P、MoP和WP的磷硫化物。结果表明,添加硫脲后制备的催化剂结晶度和粒度都有所降低。在酸性条件下电催化析氢反应(HER)中,磷硫化物活性随前驱体中硫脲质量分数的增加呈先增加后降低的趋势。制备Co_(2)P、MoP和WP的磷硫化物时前驱体中最佳的硫脲质量分数分别为26%、33%和33%。过渡金属磷化物催化HER、杂环含氮化合物加氢以及二苯并噻吩(DBT)加氢脱硫(HDS)活性顺序均为MoP>WP>Co_(2)P,说明这些反应之间存在内在联系。 展开更多
关键词 加氢脱硫 加氢脱氮 电催化析氢反应 过渡金属磷化物 过渡金属磷硫化物 硫脲
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过渡金属磷化物的改性方法及其在电化学析氢中的应用
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作者 王蕴青 杨国锐 延卫 《化工进展》 EI CAS CSCD 北大核心 2023年第7期3532-3549,共18页
过渡金属磷化物催化活性高、稳定性好,是电催化析氢的良好催化剂。然而,实现过渡金属磷化物在电解水制氢领域的大规模应用,还需要进一步提升其催化性能。本文以过渡金属磷化物的组成变化为出发点,从金属/磷(M/P)化学计量比的角度对过渡... 过渡金属磷化物催化活性高、稳定性好,是电催化析氢的良好催化剂。然而,实现过渡金属磷化物在电解水制氢领域的大规模应用,还需要进一步提升其催化性能。本文以过渡金属磷化物的组成变化为出发点,从金属/磷(M/P)化学计量比的角度对过渡金属磷化物的性能进行了总结,介绍了其常见的制备方法,详细综述了元素掺杂、构造缺陷、构建界面工程、耦合炭材料、调控微观结构、改善材料浸润性等改性方法对过渡金属磷化物电催化制氢性能的影响。最后在新型磷源的开发、测试标准化、晶面调控等方面对过渡金属磷化物的发展趋势进行了展望。 展开更多
关键词 过渡金属磷化物 催化剂 电解 制氢
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