Journal of Solid State Electrochemistry

, Volume 5, Issue 5, pp 301–305 | Cite as

Photoelectrochemically driven processes at the N,N,N′,N′-tetrahexylphenylenediamine microdroplet|electrode|aqueous electrolyte triple interface

  • Jay D. Wadhawan
  • Richard G. Compton
  • Frank Marken
  • Steven D. Bull
  • Stephen G. Davies
Original Paper

Abstract

Novel photoelectrochemical processes are observed upon irradiation of the liquid|liquid|solid triple interface at microdroplets of N,N,N′,N′-tetrahexyl-para-phenylenediamine (THPD) deposited onto a basal plane pyrolytic graphite electrode and immersed in aqueous electrolyte solution. In the presence of neutral THPD, cathodic photo responses, and in the presence of THPD+, anodic photo responses with anion-dependent characteristics, are observed. A maximum in the photocurrents observed at intermediate coverage of the electrode surface suggests that the triple interface THPD|electrode|aqueous electrolyte is the reaction zone. This is the first report of photoelectrochemical processes at this type of interface.

Photoelectrochemistry Triple interface junction Voltammetry Modified electrodes Energy conversion 

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Copyright information

© Springer-Verlag 2001

Authors and Affiliations

  • Jay D. Wadhawan
    • 1
  • Richard G. Compton
    • 1
  • Frank Marken
    • 1
  • Steven D. Bull
    • 2
  • Stephen G. Davies
    • 2
  1. 1.Physical and Theoretical Chemistry Laboratory, Oxford University, South Parks Road, Oxford OX1 3QZUK
  2. 2.Dyson Perrins Laboratory, Oxford University, South Parks Road, Oxford OX1 3QYUK

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