期刊
INORGANICA CHIMICA ACTA
卷 422, 期 -, 页码 3-7出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.ica.2014.08.039
关键词
Hollow graphitic structure; Fe-N-C nanocomposite; Oxygen reduction reaction
资金
- Center of Excellence (COE) program of the Korea Institute of Science and Technology
- New & Renewable Energy Core Technology Program of the Korea Institute of Energy Technology Evaluation and Planning (KETEP) from Ministry of Trade, Industry of & Energy, Republic of Korea [20133030011320]
A novel Fe-N-C composite material with a hollow graphitized nanostructure is prepared by pyrolyzing iron-chelating, nitrogen-containing precursors adsorbed on carbon black spheres for use in the oxygen reduction reaction (ORR) of polymer electrolyte membrane fuel cells (PEMFCs). The resulting composite hybrid exhibits excellent electrocatalytic activity and a four-electron dominated ORR pathway in an alkaline solution. The efficient catalytic activity of the prepared Fe-N-C is mainly attributed to the effective incorporation of nitrogen and iron atoms into the graphitized matrices and high electrical conductivity due to the interconnected structure. Furthermore, the hybrid material shows superior catalytic durability in the alkaline medium even after 3000 cyclic voltammetry cycles, making it a good candidate for a cathodic electrocatalyst in PEMFCs. (C) 2014 Elsevier B. V. All rights reserved.
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