Anion-Induced Size Selection of β-Mo2C Supported on Nitrogen-Doped Carbon Nanotubes for Electrocatalytic Hydrogen Evolution

被引：44

作者：

Ji, Min ^{[1
]}

Niu, Siqi ^{[1
]}

Du, Yunchen ^{[1
]}

Song, Bo ^{[2
]}

Xu, Ping ^{[1
]}

机构：

[1] Harbin Inst Technol, Sch Chem & Chem Engn, MIIT Key Lab Crit Mat Technol New Energy Convers, 92 West Dazhi St, Harbin 150001, Heilongjiang, Peoples R China

[2] Harbin Inst Technol, Dept Phys, Acad Fundamental & Interdisciplinary Sci, 92 West Dazhi St, Harbin 150001, Heilongjiang, Peoples R China

来源：

ACS SUSTAINABLE CHEMISTRY & ENGINEERING | 2018年 / 6卷 / 09期

基金：

中国国家自然科学基金; 中国博士后科学基金;

关键词：

beta-Mo2C; Carbon nanotubes; Electrocatalysis; Hydrogen evolution reaction; Polyaniline; Size selection; MOLYBDENUM CARBIDE NANOPARTICLES; HIGHLY EFFICIENT; MO2C-AT-C NANOSPHERES; ENHANCED HYDROGEN; RATIONAL DESIGN; GRAPHENE OXIDE; CATALYST; ULTRASMALL; SULFUR; NANOCOMPOSITES;

D O I：

10.1021/acssuschemeng.8b02194

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

Molybdenum carbide materials are considered to be promising hydrogen evolution reaction (HER) electrocatalysts due to their similar electronic structures and catalytic activities to Pt-based catalysts. Here, we report a facile synthesis of beta-Mo2C nanoparticles supported on nitrogen-doped carbon nanotubes (Mo2C/N-C) through a one-step carbonization of Mo-containing anion-doped polyaniline nanotubes. It has been revealed that the size of the obtained Mo2C nanoparticles can be effectively tuned by applying different Mo-containing anions. With MoO42- from Na2MoO4, the as-prepared Mo2C/N-C(S) with ultrasmall (2-3 nm) Mo2C nanoparticles shows excellent electrocatalytic HER activity in acidic media, with an overpotential of 189 mV vs reversible hydrogen electrode (RHE) at a geometric current density of -10 mA cm(-2) and a Tafel slope of 58 mV dec(-1). This study opens up a new avenue for the size-controllable synthesis of transition metal carbide nanoparticles loaded on carbon supports for energy conversion applications.

引用

页码：11922 / 11929

页数：15

共 60 条

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