Journal
APPLIED CATALYSIS B-ENVIRONMENTAL
Volume 158, Issue -, Pages 60-69Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.apcatb.2014.03.033
Keywords
Doped carbon catalyst; Fuel cell; Graphene-like; Melamine; Oxygen reduction reaction
Funding
- National Science Foundation of China (NSFC) [20876062, 21076089, 21276098, 11132004]
- Guangdong Natural Science Foundation [S2012020011061]
- Doctoral Fund of Ministry of Education of China [20110172110012]
- Doctoral Fund of Department of Education of Guangdong
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By pyrolyzing hybrid precursor of poly o-phenylenediamine (oPD), melamine and iron in an Ar atmosphere, a doped carbon catalyst, Fe/oPD-Mela, with high surface area, high pyridinic and graphitic nitrogen content, is prepared successfully. This catalyst exhibit high performance towards the oxygen reduction in both alkaline and acid mediums; actually its activity surpassed that of commercial Pt/C catalyst in an alkaline medium. In 0.1 M KOH, the half-wave potential is high up to 0.91V, which is about 50 mV higher than that of Pt/C, and the current density at 0.90V is about 2.4 times to that of the Pt/C catalyst. And in an acid medium, its activity approaches that of a Pt/C catalyst. Furthermore, this catalyst also showed high stability and impressive immunity towards methanol. The probable roles of added iron and melamine are investigated intensively; both of them are playing an important role in the ORR activity of Fe/oPD-Mela. (C) 2014 Elsevier B.V. All rights reserved.
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