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Transition-Metal Oxide Electrocatalysts for O2 Electrodes: The Pyrochlores

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Electrochemistry in Transition

Abstract

There has been wide interest in the search for bifunctional oxygen electrocatalysts which can reversibly or nearly reversibly catalyze both the reduction and the generation of O2. There are two possible approaches: (1) use of a single bifunctional electrocatalyst which promotes both reactions; and (2) use of separate electrocatalysts for the two reactions within one electrode. Both approaches have been tried by various groups. The use of separate catalysts for these two functions provides a much wider range of materials for consideration. In this chapter, however, the first approach will be emphasized, with the focus on the transition-metal pyrochlore oxides, particularly the lead ruthenate pyrochlore and related materials. These pyrochlores have metallic conductivity, can be prepared in very high area forms, and also show high electrocatalytic activity for both O2 reduction and generation.(1–4) The nature of the electrocatalysis is also very much dependent on the surface electronic properties of the catalyst, which in turn are dependent to some extent on the bulk properties.

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Author information

Authors and Affiliations

  1. Chemical Technology, Argonne National Laboratory, Argonne, Illinois, 60439, USA

    Jai Prakash

  2. Case Center for Electrochemical Sciences and the Chemistry Department, Case Western Reserve University, Cleveland, Ohio, 44106, USA

    Jai Prakash, Donald Tryk, Wesley Aldred & Ernest Yeager

Authors
  1. Jai Prakash
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  2. Donald Tryk
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  3. Wesley Aldred
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  4. Ernest Yeager
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Editor information

Editors and Affiliations

  1. Texas A&M University, College Station, Texas, USA

    Oliver J. Murphy  & Supramaniam Srinivasan  & 

  2. University of Ottawa, Ottawa, Ontario, Canada

    Brian E. Conway

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© 1992 Plenum Press, New York

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Prakash, J., Tryk, D., Aldred, W., Yeager, E. (1992). Transition-Metal Oxide Electrocatalysts for O2 Electrodes: The Pyrochlores. In: Murphy, O.J., Srinivasan, S., Conway, B.E. (eds) Electrochemistry in Transition. Springer, Boston, MA. https://doi.org/10.1007/978-1-4615-9576-2_8

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  • DOI: https://doi.org/10.1007/978-1-4615-9576-2_8

  • Publisher Name: Springer, Boston, MA

  • Print ISBN: 978-1-4615-9578-6

  • Online ISBN: 978-1-4615-9576-2

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