Journal
CATALYSTS
Volume 5, Issue 2, Pages 981-991Publisher
MDPI
DOI: 10.3390/catal5020981
Keywords
phosphorus and nitrogen dual doped; graphene; carbon catalyst; fuel cell; oxygen reduction reaction
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Funding
- National Science Foundation of China (NSFC) [21076089, 21276098, 11132004, U1301245]
- Ministry of Science and Technology of China [2012AA053402]
- Guangdong Natural Science Foundation [S2012020011061]
- Ministry of Education of China [20110172110012]
- Basic Scientific Foundation of the Central Universities of China [2013ZP0013]
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A P, N dual doped reduced graphene oxide (PN-rGO) catalyst with high surface area (376.20 m(2)g(-1)), relatively high P-doping level (1.02 at. %) and a trace amount of N (0.35 at. %) was successfully prepared using a one-step method by directly pyrolyzing a homogenous mixture of graphite oxide (GO) and diammonium hydrogen phosphate ((NH4)(2)HPO4) in an argon atmosphere, during which the thermal expansion, deoxidization of GO and P, N co-doping were realized simultaneously. The catalyst exhibited enhanced catalytic performances for oxygen reduction reaction (ORR) via a dominated four-electron reduction pathway, as well as superior long-term stability, better tolerance to methanol crossover than that of commercial Pt/C catalyst in an alkaline solution.
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