Ordered mesoporous porphyrinic carbons with very high electrocatalytic activity for the oxygen reduction reaction
2013 (English)In: Scientific Reports, ISSN 2045-2322, Vol. 3, 2715- p.Article in journal (Refereed) Published
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.
Place, publisher, year, edition, pages
2013. Vol. 3, 2715- p.
Natural Sciences Engineering and Technology
IdentifiersURN: urn:nbn:se:su:diva-95081DOI: 10.1038/srep02715ISI: 000324694200001OAI: oai:DiVA.org:su-95081DiVA: diva2:658683
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. 2013-10-222013-10-212013-10-22Bibliographically approved