Assembling Co9S8 nanoflakes on Co3O4 nanowires as advanced core/shell electrocatalysts for oxygen evolution reaction

被引：53

作者：

Deng, Shengjue ^{[1
,2
]}

Shen, Shenghui ^{[1
,2
]}

Zhong, Yu ^{[1
,2
]}

Zhang, Kaili ^{[1
,2
]}

Wu, Jianbo ^{[3
]}

Wang, Xiuli ^{[1
,2
]}

Xia, Xinhui ^{[1
,2
]}

Tu, Jiangping ^{[1
,2
]}

机构：

[1] Zhejiang Univ, State Key Lab Silicon Mat, Key Lab Adv Mat & Applicat Batteries Zhejiang Pro, Hangzhou 310027, Zhejiang, Peoples R China

[2] Zhejiang Univ, Sch Mat Sci & Engn, Hangzhou 310027, Zhejiang, Peoples R China

[3] Taizhou Univ, Zhejiang Prov Key Lab Cutting Tools, Taizhou 318000, Zhejiang, Peoples R China

来源：

JOURNAL OF ENERGY CHEMISTRY | 2017年 / 26卷 / 06期

基金：

中国国家自然科学基金;

关键词：

Metal sulfides; Nanoflakes; Nanowires; Core/shell arrays; Electrocatalysis; Oxygen evolution reaction; LITHIUM-ION BATTERIES; NITROGEN-DOPED CARBON; HYDROGEN EVOLUTION; HIGHLY EFFICIENT; WATER OXIDATION; BIFUNCTIONAL ELECTROCATALYST; HIGH-CAPACITY; NANOPARTICLES; ANODE; OXIDE;

D O I：

10.1016/j.jechem.2017.10.015

中图分类号：

O69 [应用化学];

学科分类号：

081704 ;

摘要：

Rational design of advanced cost-effective electrocatalysts is vital for the development of water electrolysis. Herein, we report a novel binder-free efficient Co9S8@Co3O4 core/shell electrocatalysts for oxygen evolution reaction (OER) via a combined hydrothermal-sulfurization method. The sulfurized net-like Co9S8 nanoflakes are strongly anchored on the Co3O4 nanowire core forming self-supported binder-free core/shell electrocatalysts. Positive advantages including larger active surface area of Co9S8 nanoflakes, and reinforced structural stability are achieved in the Co9S8@Co3O4 core/shell arrays. The OER performances of the Co9S8@Co3O4 core/shell arrays are thoroughly tested and enhanced electrocatalytic performance with lower over-potential (260 mV at 20 mA cm(-2)) and smaller Tafel slopes (56 mV dec(-1)) as well as long-term durability are demonstrated in alkaline medium. Our proposed core/shell smart design may provide a new way to construct other advanced binder-free electrocatalysts for applications in electrochemical catalysis. (C) 2017 Science Press and Dalian Institute of Chemical Physics, Chinese Academy of Sciences. Published by Elsevier B.V. and Science Press. All rights reserved.

引用

页码：1203 / 1209

页数：7

共 39 条

[1] Nitrogen-doped cobalt nanoparticles/nitrogen-doped plate-like ordered mesoporous carbons composites as noble-metal free electrocatalysts for oxygen reduction reaction [J].