Journal
JOURNAL OF COLLOID AND INTERFACE SCIENCE
Volume 421, Issue -, Pages 160-164Publisher
ACADEMIC PRESS INC ELSEVIER SCIENCE
DOI: 10.1016/j.jcis.2014.02.001
Keywords
Heteroatom doped carbon; Metal-free catalysts; Oxygen reduction; Fuel cell
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Funding
- 973 Program [2013CB328804]
- National Natural Science Foundation of China [21343002, 61235007, 21102091, 21372155]
- Program for Professor of Special Appointment (Eastern Scholar)
- Scientific Research Foundation for Returned Scholars from Ministry of Education of China
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The high cost of platinum (Pt) based catalysts for oxygen reduction reaction (ORR) has restricted the widespread commercialization of fuel cells. Heteroatom (N, B, P, S or Se) doped carbon materials have been regarded as the promising metal-free catalysts for replacing Pt based catalysts owing to their high efficiencies, good stability and relative low cost. In this work, we present a cost-effective synthesis approach for heteroatom (N and S) doped mesoporous carbon/graphene (HMCG) nanosheets by using nano-casting technology with mesoporous silica/graphene nanosheets (MSG) as hard templates, and four different amino acids (alanine, serine, arginine and cystine) as heteroatom (N, S) and carbon precursors. The resulting catalysts exhibited excellent electrocatalytic activity for ORR in alkaline media. In particular, HMCG(Ala) with alanine as precursors showed the highest electron transfer numbers and durability. These results indicated the attractive potential of HMCGs as metal-free catalysts in practical fuel cells. (c) 2014 Elsevier Inc. All rights reserved.
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