期刊
SCIENTIFIC REPORTS
卷 3, 期 -, 页码 -出版社
NATURE PUBLISHING GROUP
DOI: 10.1038/srep02715
关键词
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资金
- Basic Science Research Program through the National Research Foundation (NRF) of Korea
- Ministry of Education [NRF-2013R1A1A2012960, NRF-2013R1A1A2010795]
- TJ Park Junior Faculty Fellowship
- Korea Institute of Energy Research (KIER) [B3-2415]
- U.S. Department of Energy (DOE), Divisions of Chemical and Material Sciences [DE-AC02-98CH10886]
- WCU (Korea) [R-31-2008-000-10035-0]
- Berzelii EXSELENT
- 3DEM-NATUR (Sweden)
- Basic Science Research Program through the NRF
- Ministry of Education
- Mid-career Researcher Program through the NRF
- Ministry of Science, ICT & Future Planning [NRF-2011-0029412]
- National Junior Research Fellowship [NRF-2013H1A8A1003741]
- Global Ph.D. Fellowship [NRF-2013H1A2A1032644]
- POSTECH
The high cost of the platinum-based cathode catalysts for the oxygen reduction reaction (ORR) has impeded the widespread application of polymer electrolyte fuel cells. We report on a new family of non-precious metal catalysts based on ordered mesoporous porphyrinic carbons (M-OMPC; M = Fe, Co, or FeCo) with high surface areas and tunable pore structures, which were prepared by nanocasting mesoporous silica templates with metalloporphyrin precursors. The FeCo-OMPC catalyst exhibited an excellent ORR activity in an acidic medium, higher than other non-precious metal catalysts. It showed higher kinetic current at 0.9 V than Pt/C catalysts, as well as superior long-term durability and MeOH-tolerance. Density functional theory calculations in combination with extended X-ray absorption fine structure analysis revealed a weakening of the interaction between oxygen atom and FeCo-OMPC compared to Pt/C. This effect and high surface area of FeCo-OMPC appear responsible for its significantly high ORR activity.
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