Synthesis of self-supported non-precious metal catalysts for oxygen reduction reaction with preserved nanostructures from the polyaniline nanofiber precursor

被引:49
作者
Hu, Yang [1 ,2 ]
Zhao, Xiao [1 ,2 ]
Huang, Yunjie [3 ]
Li, Qingfeng [3 ]
Bjerrum, Niels J. [3 ]
Liu, Changpeng [4 ]
Xing, Wei [1 ]
机构
[1] Chinese Acad Sci, Changchun Inst Appl Chem, State Key Lab Electroanalyt Chem, Changchun 130022, Peoples R China
[2] Chinese Acad Sci, Grad Sch, Beijing 100039, Peoples R China
[3] Tech Univ Denmark, Dept Energy Convers & Storage, DK-2800 Lyngby, Denmark
[4] Chinese Acad Sci, Changchun Inst Appl Chem, Lab Adv Power Sources, Changchun 130022, Peoples R China
基金
中国国家自然科学基金; 新加坡国家研究基金会;
关键词
Oxygen reduction reaction; Non-precious metal catalyst; Heat-treatment; Activity; Active site; WALLED CARBON NANOTUBES; ELECTROLYTE FUEL-CELLS; COMPOSITE CATALYSTS; AUTOGENIC PRESSURE; ACTIVE-SITES; IRON; ELECTROCATALYSTS; CATHODE; ELECTROREDUCTION; CONDUCTIVITY;
D O I
10.1016/j.jpowsour.2012.10.013
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
Non-precious metal catalysts (NPMCs) for the oxygen reduction reaction (ORR) are an active subject of recent research on proton exchange membrane fuel cells. In this study, we report a new approach to preparation of self-supported and nano-structured NPMCs using pre-prepared polyaniline (PANI) nanofibers as both nitrogen and carbon precursors. The synthesized NPMCs possess nanoworm structures preserved from the PANI precursor and exhibit high onset potential of 0.905 V vs. RHE and selective activity of nearly four-electron ORR pathways. A significant enhancement in the intrinsic activity and onset potential for the ORR is observed when the Fe content in the precursor is increased from 0 to 3.0 wt.%, while further addition to 10.0 wt.% results in a decrease in the catalytic activity. Crown Copyright (C) 2012 Published by Elsevier B.V. All rights reserved.
引用
收藏
页码:129 / 136
页数:8
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