期刊
CHEMISTRY OF MATERIALS
卷 23, 期 15, 页码 3421-3428出版社
AMER CHEMICAL SOC
DOI: 10.1021/cm2000649
关键词
non-noble-metal catalyst; graphene; Fe-N; oxygen reduction reaction; proton exchange membrane fuel cell
资金
- National Science Foundation [DMR-0819762]
- Eni S.p.A under the Eni-MIT Alliance Solar Frontiers
- U.S. Department of Energy, Division of Material Sciences and Division of Chemical Sciences [DE-AC02-98CH10886]
- Office of Naval Research
- Direct For Mathematical & Physical Scien
- Division Of Materials Research [819762] Funding Source: National Science Foundation
Non-noble-metal catalysts based on Fe-N-C moieties have shown promising oxygen reduction reaction (ORR) activity in proton exchange membrane fuel cells (PEMFCs). In this study, we report a facile method to prepare a Fe-N-C catalyst based on modified graphene (Fe-N-rGO) from heat treatment of a mixture of Fe salt, graphitic carbon nitride (g-C3N4), and chemically reduced graphene (rGO). The Fe-N-rGO catalyst was found to have pyridinic N-dominant heterocyclic N (40% atomic concentration among all N components) on the surface and have an average Fe coordination of similar to 3 N (Fe-N-3,N-average) in bulk. Rotating disk electrode measurements revealed that Fe-N-rGO had high mass activity in acid and exhibited high stability at 0.5 V at 80 degrees C in acid over 70 h, which was correlated to low H2O2 production shown from rotating ring disk electrode measurements.
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