Analysis of adsorption effects on a metal-nitrogen-carbon catalyst using a rotating ring-disk study

N. D. Leonard, S. C. Barton

    Research output: Contribution to journalArticle

    • 4 Citations

    Abstract

    A steady-state, rotating ring disk study of the oxygen reduction reaction (ORR) was conducted in acid environment using a pyrolyzed metal/nitrogen/carbon (MNC) electrocatalyst. Analysis of peroxide generation indicates that ORR proceeds both via a direct fourelectron pathway to water at high potentials and an indirect peroxide pathway at low potentials. Above 0.6 V vs RHE, the direct four-electron pathway towater without a desorbing intermediate dominates oxygen reduction because peroxide generation is inhibited due to site availability. In contrast, at potentials below 0.6 V, oxygen reduction begins to shift to the indirect peroxide pathway due to fast kinetics and higher site availability. The net peroxide generation remains relatively low over the entire range due to reduction of peroxide to water.

    Original languageEnglish (US)
    Pages (from-to)H3100-H3105
    JournalJournal of the Electrochemical Society
    Volume161
    Issue number13
    DOIs
    StatePublished - 2014

    Profile

    peroxides
    Peroxides
    oxygen
    Oxygen
    availability
    nitrogen
    carbon
    rings
    metals
    water
    Availability
    Nitrogen
    Carbon
    Metals
    Water
    Bromates
    electrocatalysts
    catalysts
    acids
    adsorption

    ASJC Scopus subject areas

    • Electrochemistry
    • Electronic, Optical and Magnetic Materials
    • Materials Chemistry
    • Surfaces, Coatings and Films
    • Renewable Energy, Sustainability and the Environment
    • Condensed Matter Physics

    Cite this

    Analysis of adsorption effects on a metal-nitrogen-carbon catalyst using a rotating ring-disk study. / Leonard, N. D.; Barton, S. C.

    In: Journal of the Electrochemical Society, Vol. 161, No. 13, 2014, p. H3100-H3105.

    Research output: Contribution to journalArticle

    Leonard, N. D.; Barton, S. C. / Analysis of adsorption effects on a metal-nitrogen-carbon catalyst using a rotating ring-disk study.

    In: Journal of the Electrochemical Society, Vol. 161, No. 13, 2014, p. H3100-H3105.

    Research output: Contribution to journalArticle

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