Ordered mesoporous porphyrinic carbons with very high electrocatalytic activity for the oxygen reduction reaction

Cheon, Jae Yeong (author)

Kim, Taeyoung (author)

Choi, YongMan (author)

Jeong, Hu Young (author)

Kim, Min Gyu (author)

Sa, Young Jin (author)

Kim, Jaesik (author)

Lee, Zonghoon (author)

Yang, Tae-Hyun (author)

Kwon, Kyungjung (author)

Terasaki, Osamu (author): Stockholms universitet,Avdelningen för oorganisk kemi och strukturkemi,Korea Advanced Institute of Science and Technology, Republic of Korea

Park, Gu-Gon (author)

Adzic, Radoslav R. (author)

Joo, Sang Hoon (author)

(creator_code:org_t)

2013-09-23
2013
English.
In: Scientific Reports. - : Springer Science and Business Media LLC. - 2045-2322. ; 3, s. 2715-

Related links:: https://doi.org/10.1...; show more...; https://www.nature.c...; https://urn.kb.se/re...; https://doi.org/10.1...; show less...

Abstract Subject headings

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.

By the author/editor: Cheon, Jae Yeong; Kim, Taeyoung; Choi, YongMan; Jeong, Hu Young; Kim, Min Gyu; Sa, Young Jin; show more...; Kim, Jaesik; Lee, Zonghoon; Yang, Tae-Hyun; Kwon, Kyungjung; Terasaki, Osamu; Park, Gu-Gon; Adzic, Radoslav ...; Joo, Sang Hoon; show less...

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