Coupling Effect Between Cobalt Oxides And Carbon For Oxygen Reduction Reaction

Authors

  • Jing Liu,

    1. Dalian National Laboratory for Clean Energy, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, 116023 Dalian (P.R. China), Fax: (+86) 411-84379797
    2. University of Chinese Academy of Sciences, 100039 Beijing (P.R. China)
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  • Prof. Luhua Jiang,

    Corresponding author
    1. Dalian National Laboratory for Clean Energy, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, 116023 Dalian (P.R. China), Fax: (+86) 411-84379797
    • Dalian National Laboratory for Clean Energy, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, 116023 Dalian (P.R. China), Fax: (+86) 411-84379797
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  • Qiwen Tang,

    1. Dalian National Laboratory for Clean Energy, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, 116023 Dalian (P.R. China), Fax: (+86) 411-84379797
    2. University of Chinese Academy of Sciences, 100039 Beijing (P.R. China)
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  • Bingsen Zhang,

    1. Institute of Metal Research, Chinese Academy of Sciences, 110016 Shenyang (P.R. China)
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  • Prof. Dang Sheng Su,

    1. Institute of Metal Research, Chinese Academy of Sciences, 110016 Shenyang (P.R. China)
    2. Fritz Haber Institute of the Max Planck Society, 14195 Berlin (Germany)
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  • Suli Wang,

    1. Dalian National Laboratory for Clean Energy, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, 116023 Dalian (P.R. China), Fax: (+86) 411-84379797
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  • Prof. Gongquan Sun

    Corresponding author
    1. Dalian National Laboratory for Clean Energy, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, 116023 Dalian (P.R. China), Fax: (+86) 411-84379797
    • Dalian National Laboratory for Clean Energy, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, 116023 Dalian (P.R. China), Fax: (+86) 411-84379797
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Abstract

original image

Same selectivity hides different pathways: The same apparent 4-electron process for the oxygen-reduction-reaction hides different pathways over carbon-supported cobalt oxide catalysts depending on the potential. At low overpotentials, the ORR intermediate HO2 preferably disproportionates to oxygen, whereas at high overpotentials the disproportionation and reduction reaction occur in parallel.

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