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

Jae Yeong Cheon, Taeyoung Kim, YongMan Choi, Hu Young Jeong, Min Gyu Kim, Young Jin Sa, Jaesik Kim, Zonghoon Lee, Tae-Hyun Yang, Kyungjung Kwon, Osamu Terasaki, Gu-Gon Park, Radoslav R. Adzic, Sang Hoon Joo

    Research output: Contribution to journalArticlepeer-review

    243 Scopus citations

    Abstract

    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 0.9â€...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.
    Original languageEnglish (US)
    JournalSCIENTIFIC REPORTS
    Volume3
    Issue number1
    DOIs
    StatePublished - 2013

    ASJC Scopus subject areas

    • General

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