文献类型：期刊文献

英文题名：N-Modified NiO Surface for Superior Alkaline Hydrogen Evolution

作者：Zhang, Le[1];Liu, Peng Fei[1];Li, Yu Hang[1];Zu, Meng Yang[1];Li, Xu[1];Jiang, Zheng[2];Wang, Yun[3];Zhao, Huijun[3];Yang, Hua Gui[1]

机构：[1]East China Univ Sci & Technol, Sch Mat Sci & Engn, Minist Educ, Key Lab Ultrafine Mat, 130 Meilong Rd, Shanghai 200237, Peoples R China;[2]Chinese Acad Sci, Shanghai Inst Appl Phys, Shanghai Synchrotron Radiat Facil, Shanghai 201204, Peoples R China;[3]Griffith Univ, Ctr Clean Environm & Energy, Gold Coast Campus, Nathan, Qld 4222, Australia

年份：2018

卷号：11

期号：6

起止页码：1020

外文期刊名：CHEMSUSCHEM

收录：;EI(收录号：20180704783463);WOS:【SCI-EXPANDED(收录号:WOS:000428315300003)】；

基金：This work was financially supported by National Natural Science Foundation of China (21573068), National Natural Science Funds for Distinguished Young Scholar (51725201), SRF for ROCS, SEM, Fundamental Research Funds for the Central Universities (222201718002, 222201714001, WD1514003), China Postdoctoral Science Foundation Funded Project (2016M601523), National Postdoctoral Program for Innovative Talents (BX201600050), Program of Shanghai Subject Chief Scientist (15XD1501300), Shanghai Sailing Program (17YF1402900), "Chen Guang" project supported by Shanghai Municipal Education Commission and Shanghai Education Development Foundation (13CG27, 16CG31).

语种：英文

外文关键词：electrocatalysis; doping; metal oxides; nickel; surface chemistry

摘要：Boosting the sluggish kinetics of the hydrogen evolution reaction in alkaline environments is key for the large-scale application of water-alkali and chlor-alkali electrolysis. In this study, nitrogen atoms are used to precisely modulate electrochemical active sites on the surface of nickel oxide with low-coordinated oxygen atoms, to achieve enhanced kinetics in alkaline hydrogen evolution. Theoretical and experimental results demonstrate that surface charge redistribution after modulation facilitates both the initial water dissociation step and the subsequent recombination of H-ad from low-coordinated oxygen sites and desorption of OHad- from nickel sites, thus accelerating the overall hydrogen evolution process. The N-modulated nickel oxide enriched in low-coordinated oxygen atoms exhibits significantly enhanced activity with a small overpotential of -100 mV at the current density of -10 mA cm(-2) and a robust stability over 90 h for hydrogen evolution in 1.0 m KOH.