Significance of an anion effect in the selective oxidation of Ce 3+ to Ce 4+ over a porous WO 3 photoanode

Soichi Takasugi, Yugo Miseki, Kotaro Sasaki, Etsuko Fujita, Kazuhiro Sayama

Research output: Contribution to journalArticlepeer-review

2 Citations (Scopus)


Herein we report the oxidation of Ce 3+ to Ce 4+ using a porous WO 3 photoanode and a Pt cathode with excellent Faradaic efficiency (FE (Ce 4+ )) of up to 98% under solar simulated light in an aqueous electrolyte solution containing a high concentration of SO 4 2− anions. The competing side oxidative reactions such as S 2 O 8 2− and O 2 production were found to be suppressed in the presence of Ce 3+ . The Ce 4+ yield (YI (Ce 4+ )) from Ce 3+ reached up to 95%. Also, a noble-metal-free biomass-derived inexpensive electrode was found to be an efficient replacement of the Pt cathode.

Original languageEnglish
Pages (from-to)369-374
Number of pages6
JournalElectrochimica Acta
Publication statusPublished - Jun 1 2019


  • Anion effect
  • Biomass
  • Ce /Ce
  • Electrochemistry
  • Photocatalysis
  • Photooxidation

ASJC Scopus subject areas

  • Chemical Engineering(all)
  • Electrochemistry

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