文献类型：期刊文献

英文题名：Boosting Alkaline Hydrogen Evolution Electrocatalysis over Metallic Nickel Sites through Synergistic Coupling with Vanadium Sesquioxide

作者：Zhang, Xin Yu[1];Yuan, Haiyang[1];Mao, Fangxin[1];Wen, Chun Fang[1];Zheng, Li Rong[2];Liu, Peng Fei[1];Yang, Hua Gui[1]

机构：[1]East China Univ Sci & Technol, Sch Mat Sci & Engn, Shanghai Engn Res Ctr Hierarch Nanomat, Key Lab Ultrafine Mat,Minist Educ, 130 Meilong Rd, Shanghai 200237, Peoples R China;[2]Chinese Acad Sci, Inst High Energy Phys, Beijing Synchrotron Radiat Facil, Beijing 100049, Peoples R China

年份：2019

卷号：12

期号：23

起止页码：5063

外文期刊名：CHEMSUSCHEM

收录：;EI(收录号：20194707719105);WOS:【SCI-EXPANDED(收录号:WOS:000495998000001)】；

基金：This work was financially supported by the National Natural Science Funds for Distinguished Young Scholars (51725201), the International (Regional) Cooperation and Exchange Projects of the National Natural Science Foundation of China (51920105003), the Innovation Program of Shanghai Municipal Education Commission (E00014), the National Natural Science Foundation of China (21573068, 51902105, 21902048), Shanghai Engineering Research Center of Hierarchical Nanomaterials (18DZ2252400), Shanghai Sailing Program (19YF1411600), China Postdoctoral Science Foundation Funded Project (2018M641938), and National Postdoctoral Program for Innovative Talents (BX20190113). The authors also thank the crew of 1W1B beamline at Beijing Synchrotron Radiation Facility for constructive assistance in the XAFS measurements and data analyses.

语种：英文

外文关键词：electrocatalysis; hydrogen evolution reaction; nanocomposites; nickel; vanadium

摘要：For renewable and sustainable energy, developing cut-price and high-efficiency electrocatalysts for the hydrogen evolution reaction (HER) by alkaline water electrolysis is of paramount importance. In this study, a compound electrocatalyst composed of nickel-vanadium sesquioxide nanoparticles supported on porous nickel foam (Ni-V2O3/NF) is found to exhibit electrocatalytic performance towards HER that is superior to that of the commercial Pt/C catalyst, with nearly zero onset overpotential, an extremely low overpotential of 25 mV to obtain a current density of -10 mA cm(-2), a Tafel slope of 58 mV dec(-1), and a good durability for 24 h in 1.0 m KOH. Theoretical calculations reveal that the presence of V2O3 optimizes the electronic structure of active Ni components and continuously accelerates the dissociation of water molecules, which in turn improves the HER kinetics. The present work will advance the development of highly efficient nanocomposite electrocatalysts for alkaline water electrocatalysis.