Surface oxidation protection strategy of CoS2 by V2O5 for electrocatalytic hydrogen evolution reaction

Wu, Jie1,2; Qin, Xuetao3,4,5; Xia, Yu6,7; Zhang, Yuanyuan2; Zhang, Bin2; Du, Yunchen2; Wang, Hsing-Lin6; Li, Siwei2,8; Xu, Ping2

2022-12-01

10.1039/d2nh00431c

Nanoscale Horizons   Impact Factor & Quartile

2055-6756

2055-6764

Transition metal sulfides (TMSs) are promising electrocatalysts for hydrogen evolution reaction (HER), while TMSs usually suffer from inevitable surface oxidation in air, and the impact of the surface oxidation on their HER catalytic activity remains unclear. Herein, we demonstrate an effective strategy for reducing the surface oxidation degree of easily oxidized CoS2 by introducing glued vanadium pentoxide (V2O5) nanoclusters, taking advantage of the preferential adsorption and strong interaction between high-valence V and O-2. Combining oxidation protection and elaborate oxidation control experiments reveal that reduced surface oxidation degree of CoS2 is conducive to affording promising HER catalytic performance, as the oxidized surface of CoS2 can hinder the dissociation of water and thus is harmful to the HER process. Direct evidence is provided that surface oxidation should be carefully considered for TMS-based HER catalysts. The present work not only develops a new strategy for protecting CoS2 from surface oxidation, but also provides deep insight into the impact of surface oxidation on the HER performance of transition metal compounds.

SCI

English

Corresponding

Natural Science Foundation of China["21871065","22071038"] ; China Postdoctoral Science Foundation[2020M670894] ; Heilongjiang Touyan Team[HITTY-20190033] ; Interdisciplinary Research Foundation of HIT[IR2021205] ; "Young Talent Support Plan" of Xi'an Jiaotong University[HG6J024] ; High-Level Innovation and Entrepreneurship Talent Project of Qinchuangyuan[QCYRCXM-2022-123] ; "Young Talent Lift Plan" of Xi'an city[095920221352]

Chemistry ; Science & Technology - Other Topics ; Materials Science

Chemistry, Physical ; Nanoscience & Nanotechnology ; Materials Science, Multidisciplinary

WOS:000912097800001

ROYAL SOC CHEMISTRY

Web of Science

1.South China Univ Technol, Sch Environm & Energy, Natl Engn Lab VOCs Pollut Control Technol & Equipm, Guangzhou 510640, Peoples R China
2.Harbin Inst Technol, Sch Chem & Chem Engn, MIIT Key Lab Crit Mat Technol New Energy Convers &, Harbin 150001, Peoples R China
3.Peking Univ, Coll Chem & Mol Engn, Beijing Natl Lab Mol Sci, Beijing 100871, Peoples R China
4.Peking Univ, Coll Engn, Beijing 100871, Peoples R China
5.Peking Univ, BIC ESAT, Beijing 100871, Peoples R China
6.Southern Univ Sci & Technol, Dept Mat Sci & Engn, Shenzhen 518055, Peoples R China
7.Univ Birmingham, Sch Phys & Astron, Birmingham B15 2TT, England
8.Xi An Jiao Tong Univ, Inst Ind Catalysis, Sch Chem Engn & Technol, Xian 710049, Peoples R China

Wu, Jie,Qin, Xuetao,Xia, Yu,et al. Surface oxidation protection strategy of CoS2 by V2O5 for electrocatalytic hydrogen evolution reaction[J]. Nanoscale Horizons,2022,8(3).

Wu, Jie.,Qin, Xuetao.,Xia, Yu.,Zhang, Yuanyuan.,Zhang, Bin.,...&Xu, Ping.(2022).Surface oxidation protection strategy of CoS2 by V2O5 for electrocatalytic hydrogen evolution reaction.Nanoscale Horizons,8(3).

Wu, Jie,et al."Surface oxidation protection strategy of CoS2 by V2O5 for electrocatalytic hydrogen evolution reaction".Nanoscale Horizons 8.3(2022).