Structure transformation induced bi-component Co–Mo/A-Co(OH)_(2)as highly efficient hydrogen evolution catalyst in alkaline media

作     者：Yingqing Ou Lu Liu Xiao Peng Lili Zhang Zhongwen Ou Wendong Zhang Yunhuai Zhang 

作者机构：School of Chemistry and Chemical EngineeringChongqing UniversityChongqing400044China Department of ChemistryNational University of SingaporeSingapore117543Singapore Institute of Sustainability for ChemicalsEnergy and Environment(ISCE2)Agency for ScienceTechnology and Research in Singapore(A*STAR)Singapore627833Singapore School of PhysicsChongqing UniversityChongqing400044China College of ChemistryChongqing Normal UniversityChongqing401331China Materials Science and Engineering CollegeSichuan University of Science&EngineeringZigong643000China Department of Military InfrastructureArmy Logistics University of PLAChongqing401311China 

出 版 物：《Nano Materials Science》 (纳米材料科学（英文版）)

年 卷 期：2024年第6卷第5期

页      面：565-575页

核心收录：

学科分类：081704[工学-应用化学] 07[理学] 070304[理学-物理化学(含∶化学物理)] 08[工学] 0817[工学-化学工程与技术] 0703[理学-化学] 

基　　金：supported by the National Natural Science Foundation of China(No.51771037) Low Carbon Energy Research Funding Initiative(No.SC22/22-71151E) 

主　　题：Co-Mo_((18%))/A-Co(OH)_(2) Electrochemical modification Water dissociation Alkaline HER 

摘      要：Elucidating the inherent origins of the sluggish hydrogen evolution reaction(HER)kinetics in alkaline media and developing high-performance electrocatalysts are fundamental for the advances of conventional alkaline water electrolyzers and emerging anion exchange membrane(AEM)*** we present a facile electrochemical modification strategy for the synthesis of bi-component Co–Mo_((18%))/A-Co(OH)_(2)catalyst toward efficient HER catalysis in alkaline *** Co–Mo alloys with adjustable Mo/Co atomic ratio are first prepared by H2-assisted cathodic *** virtue of the appropriate electronic structure and hydrogen binding energy,Co–Mo_((18%))is the most HER active among the alloys and is further activated by a constant-current electrochemical modification *** characterizations reveal the formation of amorphous Co(OH)_(2)nanoparticles on the *** analysis combined with theoretical calculations reveal that the in-situ formed Co(OH)_(2)can efficiently promote the water dissociation,resulting in accelerated Volmer-step *** a result,the Co–Mo_((18%))/A-Co(OH)_(2)simultaneously achieves the optimization of the two factors dominating alkaline HER activity,i.e.,water dissociation and hydrogen adsorption/desorption via the bifunctional synergy of the *** high HER activity(η10 of 47 mV at 10 mA cm^(-2))of Co–Mo_((18%))/A-Co(OH)_(2)is close to benchmark Pt/C catalyst and comparable or superior to the most active non-noble metal catalysts.