An efficient CoS2/CoSe2 hybrid catalyst for electrocatalytic hydrogen evolution

被引：102

作者：

Guo, Yaxiao ^{[1
,2
]}

Shang, Changshuai ^{[1
,2
]}

Wang, Erkang ^{[1
]}

机构：

[1] Chinese Acad Sci, Changchun Inst Appl Chem, State Key Lab Electroanalyt Chem, Changchun 130022, Jilin, Peoples R China

[2] Univ Chinese Acad Sci, Beijing 100049, Peoples R China

来源：

JOURNAL OF MATERIALS CHEMISTRY A | 2017年 / 5卷 / 06期

关键词：

SENSITIZED SOLAR-CELLS; MOS2 ULTRATHIN NANOSHEETS; ACTIVE EDGE SITES; HIGHLY EFFICIENT; NANOPARTICLES; GRAPHENE; CHEMISTRY; NANOBELTS; DYE;

D O I：

10.1039/c6ta09983a

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：

Herein we established a robust and highly efficient catalyst for the hydrogen evolution reaction (HER), with the characteristic of CoS2 nanoparticles dotted on the surface of CoSe2/DETA (DETA = diethylenetriamine) nanobelts (CoS2/CoSe2). The CoSe2/DETA nanobelts possess intrinsic high conductivity and superior electrocatalytic activity. In addition, the evenly distributed amino groups on the surfaces of CoSe2/DETA nanobelts contribute to copious nucleation sites, which are in favor of easy nucleation, uniform dispersion, and size control of CoS2 nanoparticles. Owing to the prominent synergistic effect between CoS2 nanoparticles and CoSe2 nanobelts, the CoS2/CoSe2 hybrid exhibits a superior HER activity with a small overpotential of 80 mV at a cathodic current density of 10 mA cm(-2), and a small Tafel slope of 33.6 mV dec(-1) in acidic media. Meanwhile, the catalyst shows excellent mechanical stability.

引用

页码：2504 / 2507

页数：4

共 37 条

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