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Structural Requirements in Lithium Cobalt Oxides for the Catalytic Oxidation of Water

Authors

  • Graeme P. Gardner,

    1. Department of Chemistry and Chemical Biology Rutgers, The State University of New Jersey, Piscataway, NJ 08854 (USA)
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  • Dr. Yong Bok Go,

    1. Department of Chemistry and Chemical Biology Rutgers, The State University of New Jersey, Piscataway, NJ 08854 (USA)
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  • David M. Robinson,

    1. Department of Chemistry and Chemical Biology Rutgers, The State University of New Jersey, Piscataway, NJ 08854 (USA)
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  • Paul F. Smith,

    1. Department of Chemistry and Chemical Biology Rutgers, The State University of New Jersey, Piscataway, NJ 08854 (USA)
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  • Prof. Joke Hadermann,

    1. Electron Microscopy for Materials Research, Physics Department, University of Antwerp, Groenenborgelaan, 171B-2020, Antwerp (Belgium)
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  • Prof. Artem Abakumov,

    1. Electron Microscopy for Materials Research, Physics Department, University of Antwerp, Groenenborgelaan, 171B-2020, Antwerp (Belgium)
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  • Prof. Martha Greenblatt,

    Corresponding author
    1. Department of Chemistry and Chemical Biology Rutgers, The State University of New Jersey, Piscataway, NJ 08854 (USA)
    • Department of Chemistry and Chemical Biology Rutgers, The State University of New Jersey, Piscataway, NJ 08854 (USA)
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  • Prof. G. Charles Dismukes

    Corresponding author
    1. Department of Chemistry and Chemical Biology Rutgers, The State University of New Jersey, Piscataway, NJ 08854 (USA)
    • Department of Chemistry and Chemical Biology Rutgers, The State University of New Jersey, Piscataway, NJ 08854 (USA)
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  • This work was supported by Rutgers University, AFOSR-FA9550-05-1 and FA9550-11-1 (G.C.D.). We acknowledge partial support by NSF-DMR-0966829 (M.G. and Y.B.G.) and an NSF predoctoral fellowship (D.M.R.). We thank Paul Field for help with elemental analysis, Zhijuan Zhang for BET measurements, and Jun Chen and Gerry Swiegers for help with electrochemical measurements. This paper honors the memory of our teacher, Peter Gabriel.

Abstract

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Who can split water? Two polymorphs of nanocrystalline cubic spinel and rhombohedral layered lithium cobalt oxides have been prepared and their application in the photocatalytic oxidation of water examined. The main factor that determines the catalytic activity of the different phases is the presence of a Co4O4 cubic core, which is present in the cubic form of the catalyst, but not in the layered structure (see scheme).

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