Journal
APPLIED CATALYSIS B-ENVIRONMENTAL
Volume 194, Issue -, Pages 202-208Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.apcatb.2016.04.056
Keywords
Ordered mesoporous N and S co-doped carbon; Oxygen reduction reaction; Electrocatalytic activity; Methanol tolerance; Stability
Funding
- National Natural Science Foundation of China [21576300, 21575299, 21276290]
- Sino-Greek Science and Technology Cooperation Project [2013DFG62590]
- Guangdong Province Nature Science Foundation [2014A030313150]
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Despite that nitrogen (N) and sulfur (S) co-doped ordered mesoporous carbon (OMC) as Pt-free catalyst for oxygen reduction reaction (ORR) shows a desirable performance, the synthesis method is always complicated and expensive, which greatly hinders its development and application. In the present work, a highly ordered mesoporous N and S co-doped carbon material is developed. The material is obtained by combining hard template and high-temperature pyrolysis method using cheap saccharin as a single-source molecular precursor, SBA-15 as the hard template and FeCl3 as the catalyst to promote the carbonization process. It is found that the as-prepared SN-OMC catalyst, compared with the commonly used commercial Pt/C (20 wt.%), exhibits comparable ORR electrocatalytic activity with mainly four-electron (4e(-)) process, superior stability and inertness to methanol in alkaline media, which could mainly benefit from the highly ordered mesoporous structure and the synergistic effect caused by the dual N and S doping. These advantages render SN-OMC a promising ORR electrocatalyst and a cheap alternative to Pt/C for practical fuel cell applications. (C) 2016 Published by Elsevier B.V.
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