Co/Mo2C composites for efficient hydrogen and oxygen evolution reaction

被引：52
作者：
Cui, Shufang [1 ]
Li, Mian [2 ]
Bo, Xiangjie [1 ]
机构：
[1] Northeast Normal Univ, Key Lab Nanobiosensing & Nanobioanal Univ Jilin P, Fac Chem, Changchun 130024, Peoples R China
[2] Kunming Univ Sci & Technol, Fac Met & Energy Engn, Kunming 650093, Yunnan, Peoples R China
来源：
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY | 2020年 / 45卷 / 41期
基金：
中国国家自然科学基金;
关键词：
Co/Mo2C; Hydrogen evolution reaction; Oxygen evolution reaction; Water splitting; MOLYBDENUM-CARBIDE; FUNCTIONAL ELECTROCATALYSTS; CARBON; REDUCTION; NANOTUBES; ELECTRODE; PERFORMANCE; CONVERSION; NANOWIRES; CATALYSTS;
D O I：
10.1016/j.ijhydene.2020.05.006
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：
Non-precious transition metal electrocatalysts with high catalytic performance and low cost enable the scalable and sustainable production of hydrogen energy through water splitting. In this work, based on the polymerization of CoMoO4 nanorods and pyrrole monomer, a heterointerface of carbon-wrapped and Co/Mo2C composites are obtained by thermal pyrolysis method. Co/Mo2C composites show considerable performance for both hydrogen and oxygen evolution in alkaline media. In alkaline media, Co/Mo2C composites show a small overpotential, low Tafel slope, and excellent stability for water splitting. Co/Mo2C exhibits a small overpotential of 157 mV for hydrogen evolution reaction and 366 mV for oxygen evolution reaction at current density of 10 mA cm(-2), as well as a low Tafel slope of 109.2 mV dec(-1) and 59.1 mV dec(-1) for hydrogen evolution reaction and oxygen evolution reaction, respectively. Co/Mo2C composites also exhibit an excellent stability, retaining 94% and 93% of initial current value for hydrogen evolution reaction and oxygen evolution reaction after 45,000 s, respectively. Overall water splitting via two-electrode water indicates Co/Mo2C can hold 91% of its initial current after 40,000 s in 1 M KOH. (C) 2020 Hydrogen Energy Publications LLC. Published by Elsevier Ltd. All rights reserved.
引用
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页码：21221 / 21231
页数：11
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