Facile electrospinning preparation of phosphorus and nitrogen dual-doped cobalt-based carbon nanofibers as bifunctional electrocatalyst

被引:66
|
作者
Wang, Zhuang [1 ]
Zuo, Pengjian [1 ]
Fan, Liquan [1 ]
Han, Jianan [1 ]
Xiong, Yueping [1 ]
Yin, Geping [1 ]
机构
[1] Harbin Inst Technol, Sch Chem Engn & Technol, Harbin 150001, Peoples R China
关键词
Electrospinning; Dual-doped; Cobalt-based carbon nanofibers; Oxygen reduction reaction; Hydrogen evolution reaction; Bifunctional electrocatalyst; OXYGEN REDUCTION REACTION; HIGH-PERFORMANCE ELECTROCATALYSTS; ORDERED MESOPOROUS CARBON; HYDROGEN GENERATION; GRAPHENE; CATALYSTS; CO; FE; NANOPARTICLES; SULFUR;
D O I
10.1016/j.jpowsour.2016.02.012
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
A novel electrochemical catalyst of phosphorus and nitrogen dual-doped cobalt-based carbon nanofibers (Co-N-P-CNFs) is prepared by a facile and cost-effective electrospinning technique. Excellent features of the porous carbon nanofibers with large amounts of Co atoms, N/P-doping effect, abundant pyridinic-N and Co-N-x clusters as catalytic active sites, and the advantages of the structure and composition result in a high catalytic efficiency. In alkaline or acidic media, Co-N-P-CNFs exhibits remarkable electrocatalytic activities and kinetics for oxygen reduction reaction (ORR), superior methanol tolerance and stability, and a similar four-electron pathway. In addition, Co-N-P-CNFs also shows excellent performance for hydrogen evolution reaction (HER), offering a low onset potential of -0.216 V and a stable current density of 10 mA cm(-2) at potential of -0.248 V. The mechanism of ORR and HER catalytic active site arises from the doping of N/P atoms in the Co-based CNFs, which is responsible for the excellent electrocatalytic performance. Due to the excellent catalytic efficiencies, Co-N-P-CNFs act as a promising catalyst material for fuel cells and water splitting technologies. Crown Copyright (C) 2016 Published by Elsevier B.V. All rights reserved.
引用
收藏
页码:68 / 80
页数:13
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