Molybdenum carbides embedded on carbon nanotubes for efficient hydrogen evolution reaction

被引：27
作者：
Guo, Junpo [1 ]
Wang, Jie [1 ]
Xuan, Cuijuan [1 ]
Wu, Zexing [1 ]
Lei, Wen [1 ]
Zhu, Jing [1 ]
Xiao, Weiping [1 ]
Wang, Deli [1 ]
机构：
[1] Huazhong Univ Sci & Technol, Key Lab Mat Chem Energy Convers & Storage, Hubei Key Lab Mat Chem & Serv Failure, Minist Educ,Sch Chem & Chem Engn, Wuhan 430074, Hubei, Peoples R China
来源：
JOURNAL OF ELECTROANALYTICAL CHEMISTRY | 2017年 / 801卷
关键词：
Hydrogen evolution reaction; Electrocatalysts; Molybdenum carbide; Carbon nanotubes; Embedded structure; ELECTROCATALYTIC ACTIVITY; HIGH-PERFORMANCE; MOS2; NANOSHEETS; ACTIVE ELECTROCATALYSTS; METAL ELECTROCATALYSTS; CONTROLLABLE SYNTHESIS; MO2C NANOPARTICLES; GRAPHENE SHEETS; NITROGEN; COMPOSITES;
D O I：
10.1016/j.jelechem.2017.07.020
中图分类号：
O65 [分析化学];
学科分类号：
070302 ; 081704 ;
摘要：
Molybdenum carbides embedded on carbon nanotubes are prepared via a simple hydrothermal method with subsequent post-treatment at high temperature. In order to optimize the electrocatalytic activity for hydrogen evolution reaction (HER), effects of hydrothermal and post-annealing temperature are systematically investigated. Electrochemical testing results indicated that Mo2C/CNT prepared at a solvothermal temperature of 200 degrees C and 800 degrees C post heat-treatment exhibits the best HER activity with an overpotential of 125 my in acid media and 93 mV in alkaline media at a current density of 10 mA cm(-2). Such enhanced catalytic activity may originate from high electro-conductivity and ECSA value, together with ultra-small particle size, which accelerates the electron transfer rate and provides large surface area and active sites, respectively.
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收藏
页码：7 / 13
页数：7
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