Novel CoxSy/WS2 nanosheets supported on carbon cloth as efficient electrocatalyst for hydrogen evolution reaction

被引：80
作者：
Shang, Xiao [1 ]
Chi, Jing-Qi [1 ]
Lu, Shan-Shan [1 ,2 ]
Dong, Bin [1 ,2 ]
Li, Xiao [1 ]
Liu, Yan-Ru [1 ]
Yan, Kai-Li [1 ]
Gao, Wen-Kun [1 ,2 ]
Chai, Yong-Ming [1 ]
Liu, Chen-Guang [1 ]
机构：
[1] China Univ Petr East China, State Key Lab Heavy Oil Proc, Qingdao 266580, Peoples R China
[2] China Univ Petr East China, Coll Sci, Qingdao 266580, Peoples R China
来源：
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY | 2017年 / 42卷 / 07期
基金：
中国国家自然科学基金;
关键词：
CoxSy-incorporating; WS2; Carbon cloth; Hydrothermal; Hydrogen evolution reaction; EDGE SITES; CATHODE; CO; NANOPARTICLES; COMPOSITES; CATALYSTS; ELECTRODE; ARRAYS; ROBUST; FILM;
D O I：
10.1016/j.ijhydene.2016.10.109
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
To maximum the activity of transition metal sulfides for hydrogen evolution reaction (HER), two strategies usually have been adopted including designing unique nano structures and integrating other metal element. Herein, CoxSy/WS2 nanosheets supported on carbon cloth (CoxSy/WS2/CC) have been fabricated via a facile hydrothermal process. The cross-linked structures composed of CoxSy/WS2 nanosheets uniformly cover on the surface of CC, which may expose abundant active sites for HER and accelerate charge transfer rate. The molar ratio of CoxSy-incorporating has been investigated in detail. The molar ratio of W/Co = 1/3 (noted as CoxSy/WS2/CC-3) has been proved to have unique spherical Co(x)y/WS2 nanostructure, which may further expose more active sites for HER. Electrochemical measurements demonstrate that CoxSy-incorporating can enhance HER activity and conductivity compared with WS2/CC. In addition, CoxSy/WS2/CC-3 exhibits the best HER activity, smallest charge transfer resistance and excellent stability than the counterparts, implying that the degree of CoxSy-incorporating may impact the HER activity of WS2. The mechanisms of CoxSy-incorporating on enhancing HER activity of WS2 have been discussed. It may offer a promising way to design transition metal sulfides-based electrocatalysts for HER by non-precious metal incorporating. (C) 2016 Hydrogen Energy Publications LLC. Published by Elsevier Ltd. All rights reserved.
引用
收藏
页码：4165 / 4173
页数：9
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