期刊
JOURNAL OF POWER SOURCES
卷 196, 期 1, 页码 182-185出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.jpowsour.2010.06.046
关键词
Amorphous catalyst; Iron-based electrocatalyst; Oxygen reduction reaction; Electrocatalytic activity; Cell performance
资金
- Hi-tech Research and Development Program of China (863) [2007AA05Z144]
- Education ministry of China [20070335003]
- China Postdoctoral Science Foundation [20090461364]
- National Natural Science Foundation of China [20976156, 50971114]
An amorphous Fe-based catalyst supported on polypyrrole-modified carbon nanotubes is synthesized by a chemical method. The microstructure, surface composition and morphology are characterized by X-ray diffraction, X-ray photoelectron spectroscopy, and scanning electron microscopy. The synthesized amorphous Fe-based catalyst is composed of amorphous FeOOH and microcrystalline Fe2O3. Compared with a crystalline FeOOH catalyst, the amorphous Fe-based catalyst demonstrates higher electrocatalytic activity toward the oxygen reduction reaction (ORR), clue to its amorphous structure and large specific surface area. It is considered that amorphization of transition metal compounds could be one of the methods used to improve their catalytic activity toward the ORR. (c) 2010 Elsevier B.V. All rights reserved.
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