期刊
JOURNAL OF MATERIALS CHEMISTRY
卷 22, 期 25, 页码 12810-12816出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/c2jm31525d
关键词
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资金
- National Basic Research Program of China (973 Program) [2012CB933402]
- Natural Science Foundation of China [91027028, 51161120361]
- State Key Laboratory of Bioelectronics (Southeast University)
Nanoporous nitrogen doped carbon was used to modify the surfaces of graphene sheets by carbonizing a mixture of graphene oxide and phenol-melamine-formaldehyde (PMF) pre-polymer in the presence of a soft template (F127). The resulting graphene based composite sheets (G-PMFs) have a sandwich structure with one graphene layer and two nanoporous nitrogen-doped carbon layers. G-PMFs have large specific surface areas of 190 to 630 m(2) g(-1) and exhibited high electrocatalytic activity, good durability and high selectivity for the oxygen reduction reaction. The performance of the Zn-air fuel cell with a G-PMF anode was tested and found to be comparable to that of the Zn-air cell with a commercial Pt/C anode. Thus, these metal-free catalysts are promising for applications in practical fuel cells.
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