Photocatalytic Energy Storage over Surface-modified WO<sub>3</sub> Using V<sup>5+</sup>/V<sup>4+</sup> Redox Mediator

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  • Miseki Yugo
    Energy Technology Research Institute, National Institute of Advanced Industrial Science and Technology (AIST)
  • Kusama Hitoshi
    Energy Technology Research Institute, National Institute of Advanced Industrial Science and Technology (AIST)
  • Sayama Kazuhiro
    Energy Technology Research Institute, National Institute of Advanced Industrial Science and Technology (AIST)

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Other Title
  • Photocatalytic Energy Storage over Surface-modified WO3 Using V5+/V4+ Redox Mediator

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Description

Photocatalytic V5+ reduction accompanied by O2 evolution over WO3 is reported for the first time. Water oxidation reaction utilizing VO2+ ion as an electron acceptor proceeded photocatalytically over WO3. The activity of WO3 was remarkably enhanced by the presence of Fe3+/2+ ion at the ion-exchange site on WO3 surface, and its apparent quantum yield (AQY) was 22% at 420 nm. Moreover, the AQY was raised to about 78% when a small amount of formic acid was added to reactant solution.

Journal

  • Chemistry Letters

    Chemistry Letters 41 (11), 1489-1491, 2012

    The Chemical Society of Japan

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