Efficient Photoelectrochemical Water Oxidation over Cobalt-Phosphate (Co-Pi) Catalyst Modified BiVO4/1D-WO3 Heterojunction Electrodes

Satyananda Kishore Pilli, Rajeswari Janarthanan, Todd G. Deutsch, Thomas E. Furtak, Logan D. Brown, John A. Turner, Andrew M. Herring

Research output: Contribution to journalArticlepeer-review

80 Scopus Citations


We report the design, synthesis and photoelectrochemical characterization of cobalt phosphate (Co-Pi) oxygen evolution catalyst modified heterojunction photoelectrodes consisting of one-dimensional WO3 nanorods (1D-WO3) and highly porous BiVO4 layers. The 1D-WO 3 nanorods were prepared by the decomposition of the tetrabutylammonium decatungstate precursor in the presence of poly(ethylene glycol) as a binding agent. The porous BiVO4 layers were spray deposited using a surfactant assisted metal-organic decomposition method. The Co-Pi oxygen evolution catalyst was deposited onto the BiVO4/1D- WO3/FTO heterojunction electrode using a photoassisted electrodeposition method. The Co-Pi catalyst modified heterojunction electrodes exhibited a sustained enhancement in the photocurrent compared to the unmodified BiVO4/1D-WO3/FTO heterojunction electrodes. The improved photoelectrochemical properties profited from the enhanced charge carrier separation achieved through the integration of highly porous BiVO4 layers on top of 1D-WO3 nanorods and from the superior kinetics due to the presence of the Co-Pi oxygen evolution catalyst on top of BiVO 4/1D-WO3/FTO heterojunction electrodes. This journal is

Original languageAmerican English
Pages (from-to)14723-14728
Number of pages6
JournalPhysical Chemistry Chemical Physics
Issue number35
StatePublished - 21 Sep 2013

NREL Publication Number

  • NREL/JA-5900-59368


  • cobalt phosphate
  • photoelectrochemical characterization
  • photoelectrodes


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