CO 2 conversion with light and water by GaN photoelectrode

Satoshi Yotsuhashi*, Masahiro Deguchi, Yuji Zenitani, Reiko Hinogami, Hiroshi Hashiba, Yuka Yamada, Kazuhiro Ohkawa

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

34 Scopus citations


Light illumination on a photoelectrode creates separate electron and hole pairs that lead to an oxidation and reduction reaction. Here, we show that CO 2 reduction by means of water and light is realized by a gallium nitride (GaN) photoelectrode in which excited electrons drive CO 2 conversion at the counterelectrode. A copper (Cu) plate was chosen as the counterelectrode. With this system, the generation of formic acid (HCOOH) with 9% Faradic efficiency was confirmed by light illumination alone with the help of NiO co-catalysts.

Original languageEnglish (US)
Article number02BP07
JournalJapanese Journal of Applied Physics
Issue number2 PART 2
StatePublished - Feb 2012
Externally publishedYes

ASJC Scopus subject areas

  • General Engineering
  • General Physics and Astronomy


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