A Self-Standing High-Performance Hydrogen Evolution Electrode with Nanostructured NiCo2O4/CuS Heterostructures

被引：231

作者：

An, Li ^{[1
,2
]}

Huang, Liang ^{[3
]}

Zhou, Panpan ^{[1
,2
]}

Yin, Jie ^{[1
,2
]}

Liu, Hongyan ^{[1
,2
]}

Xi, Pinxian ^{[1
,2
]}

机构：

[1] Lanzhou Univ, State Key Lab Appl Organ Chem, Key Lab Nonferrous Met Chem & Resources Utilizat, Lanzhou 730000, Peoples R China

[2] Lanzhou Univ, Res Ctr Biomed Nanotechnol, Lanzhou 730000, Peoples R China

[3] Huazhong Univ Sci & Technol, Sch Opt & Elect Informat, Wuhan Natl Lab Optoelect, Wuhan 430074, Peoples R China

来源：

ADVANCED FUNCTIONAL MATERIALS | 2015年 / 25卷 / 43期

基金：

中国国家自然科学基金;

关键词：

ACTIVE EDGE SITES; MOS2 ULTRATHIN NANOSHEETS; NANOWIRE ARRAYS; H-2; PRODUCTION; COBALT OXIDE; WATER; NANOPARTICLES; CATALYSTS; CARBON; PHOSPHIDE;

D O I：

10.1002/adfm.201503784

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

An efficient self-standing 3D hydrogen evolution cathode has been developed by coating nickel cobaltite (NiCo2O4)/CuS nanowire heterostructures on a carbon fiber paper (CFP). The obtained CFP/NiCo2O4/CuS electrode shows exceptional hydrogen evolution reaction (HER) performance and excellent durability in acidic conditions. Remarkably, as an integrated 3D hydrogen-evolving cathode operating in acidic electrolytes, CFP/NiCo2O4/CuS maintains its activity more than 50 h and exhibits an onset overpotential of 31.1 mV, an exchange current density of 0.246 mA cm(-2), and a Tafel slope of 41 mV dec(-1). Compared to other non-Pt electrocatalysts reported to date, CFP/NiCo2O4/CuS exhibits the highest HER activity and can be used in HER to produce H-2 with nearly quantitative faradaic yield in acidic aqueous media with stable activity. Furthermore, by using CFP/NiCo2O4/CuS as a self-standing electrode in a water electrolyzer, a current density of 18 mA cm(-2) can be achieved at a voltage of 1.5 V which can be driven by a single-cell battery. This strategy provides an effective, durable, and non-Pt electrode for water splitting and hydrogen generation.

引用

页码：6814 / 6822

页数：9

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