Three-dimensional porous carbon nanofiber networks decorated with cobalt-based nanoparticles: A robust electrocatalyst for efficient water oxidation

被引：26

作者：

Cao, Guo-Lin ^{[1
]}

Yan, Yi-Ming ^{[1
]}

Liu, Ting ^{[1
]}

Rooney, David ^{[2
]}

Guo, Yao-Fang ^{[1
]}

Sun, Ke-Ning ^{[1
,3
]}

机构：

[1] Beijing Inst Technol, Beijing Key Lab Chem Power Source & Green Catalys, Sch Chem Engn & Environm, Beijing 100081, Peoples R China

[2] Queens Univ Belfast, Sch Chem & Chem Engn, Belfast BT9 5AG, Antrim, North Ireland

[3] Collaborat Innovat Ctr Elect Vehicles Beijing, Beijing 100081, Peoples R China

来源：

CARBON | 2015年 / 94卷

基金：

中国国家自然科学基金;

关键词：

OXYGEN EVOLUTION REACTION; BACTERIAL-CELLULOSE; DOPED GRAPHENE; OXIDE; ENERGY; HYDROXIDE; CATALYST; PERFORMANCE; REDUCTION; STORAGE;

D O I：

10.1016/j.carbon.2015.07.063

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：

Electrochemical water splitting used for generating hydrogen has attracted increasingly attention due to energy and environmental issues. It is a major challenge to design an efficient, robust and inexpensive electrocatalyst to achieve preferable catalytic performance. Herein, a novel three-dimensional (3D) electrocatalyst was prepared by decorating nanostructured biological material-derived carbon nanofibers with in situ generated cobalt-based nanospheres (denoted as CNF@Co) through a facile approach. The interconnected porous 3D networks of the resulting CNF@Co catalyst provide abundant channels and interfaces, which remarkably favor both mass transfer and oxygen evolution. The as-prepared CNF@Co shows excellent electrocatalytic activity towards the oxygen evolution reactions with an onset potential of about 0.445 V vs. Ag/AgCl. It only needs a low overpotential of 314 mV to achieve a current density of 10 mA/cm(2) in 1.0 M KOH. Furthermore, the CNF@Co catalyst exhibits excellent stability towards water oxidation, even outperforming commercial IrO2 and RuO2 catalysts. (C) 2015 Elsevier Ltd. All rights reserved.

引用

页码：680 / 686

页数：7

共 42 条

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