Holey Reduced Graphene Oxide Coupled with an Mo2N-Mo2C Heterojunction for Efficient Hydrogen Evolution

被引：521

作者：

Yan, Haijing ^{[1
]}

Xie, Ying ^{[1
]}

Jiao, Yanqing ^{[1
]}

Wu, Aiping ^{[1
]}

Tian, Chungui ^{[1
]}

Zhang, Xiaomeng ^{[1
]}

Wang, Lei ^{[1
]}

Fu, Honggang ^{[1
]}

机构：

[1] Heilongjiang Univ, Key Lab Funct Inorgan Mat Chem, Minist Educ Peoples Republ China, Harbin 150080, Heilongjiang, Peoples R China

来源：

ADVANCED MATERIALS | 2018年 / 30卷 / 02期

关键词：

heterojunctions; holey graphene; hydrogen evolution reaction; molybdenum carbide; molybdenum nitride; HIGHLY EFFICIENT; HIGH-PERFORMANCE; POROUS GRAPHENE; MOLYBDENUM-CARBIDE; ELECTROCATALYST; CATALYSTS; NANOPARTICLES; NANOMESH; FABRICATION; CLUSTERS;

D O I：

10.1002/adma.201704156

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

An in situ catalytic etching strategy is developed to fabricate holey reduced graphene oxide along with simultaneous coupling with a small-sized Mo2N-Mo2C heterojunction (Mo2N-Mo2C/HGr). The method includes the first immobilization of H3PMo12O40 (PMo12) clusters on graphite oxide (GO), followed by calcination in air and NH3 to form Mo2N-Mo2C/HGr. PMo12 not only acts as the Mo heterojunction source, but also provides the Mo species that can in situ catalyze the decomposition of adjacent reduced GO to form HGr, while the released gas (CO) and introduced NH3 simultaneously react with the Mo species to form an Mo2N-Mo2C heterojunction on HGr. The hybrid exhibits superior activity towards the hydrogen evolution reaction with low onset potentials of 11 mV (0.5 m H2SO4) and 18 mV (1 m KOH) as well as remarkable stability. The activity in alkaline media is also superior to Pt/C at large current densities (> 88 mA cm(-2)). The good activity of Mo2N-Mo2C/HGr is ascribed to its small size, the heterojunction of Mo2N-Mo2C, and the good charge/mass-transfer ability of HGr, as supported by a series of experiments and theoretical calculations.

引用

页数：8

共 54 条

[1] New single source route to the molybdenum nitride Mo2N [J].