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Novel carbon-supported Fe-N electrocatalysts synthesized through heat treatment of iron tripyridyl triazine complexes for the PEM fuel cell oxygen reduction reaction
被引:149
作者:
Bezerra, Cicero W. B.
[1
,2
]
Zhang, Lei
[1
]
Lee, Kunchan
[1
]
Liu, Hansan
[1
]
Zhang, Jianlu
[1
]
Shi, Zheng
Marques, Aldalea L. B.
[3
]
Marques, Edmar P.
[2
]
Wu, Shaohong
[1
]
Zhang, Jiujun
[1
]
机构:
[1] Natl Res Council Canada, Inst Fuel Cell Innovat, Vancouver, BC V6T 1W5, Canada
[2] Univ Fed Maranhao, Dept Chem, BR-65080040 Sao Luis, MA, Brazil
[3] Univ Fed Maranhao, Dept Chem Technol, Sao Luis, MA, Brazil
关键词:
catalyst carbon support;
electrocatalyst;
oxygen reduction reaction (ORR);
iron (Fe)-nitrogen (N);
2,4,6-Tris(2-pyridyl)-1,3,5-triazine (TPTZ);
heat (pyrolysis) treatment;
proton exchange membrane (PEM) fuel cell;
D O I:
10.1016/j.electacta.2008.05.030
中图分类号:
O646 [电化学、电解、磁化学];
学科分类号:
081704 ;
摘要:
2,4,6-Tris(2-pyridyl)-1,3,5-triazine (TPTZ) was used as a ligand to prepare iron-TPTZ(Fe-TPTZ) complexes for the development of a new oxygen reduction reaction (ORR) catalyst. The prepared Fe-TPTZ complexes were then heat-treated at temperatures ranging from 400 degrees C to 1100 degrees C to obtain carbon-supported Fe-N catalysts (Fe-N/C). These catalysts were characterized in terms of catalyst composition, structure, and morphology by several instrumental methods such as energy dispersive X-ray, X-ray diffraction, transmission electron microscopy, and X-ray photoelectron spectroscopy. With respect to the ORR activity, the Fe-NJC catalysts were also evaluated by cyclic voltammetry, as well as rotating disk and ring-disk electrodes. The results showed that among the heat-treated catalysts, that obtained at a heat-treatment temperature of 800 degrees C is the most active ORR catalyst. The overall electron transfer number for the catalyzed ORR was determined to be between 3.5 and 3.8, with 10-30% H2O2 production. The ORR catalytic activity of this catalyst was also tested in a hydrogen-air proton exchange membrane (PEM) fuel cell. At a cell voltage of 0.30V, this fuel cell can give a current density of 0.23 A cm(-2) with a maximum MEA power density of 0.070 W cm(-2) indicating that this catalyst has potential to be used as a non-noble catalyst in PEM fuel cells. Crown Copyright (c) 2008 Published by Elsevier Ltd. All rights reserved.
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页码:7703 / 7710
页数:8
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