Selectivity control of CO2 reduction in an inorganic artificial photosynthesis system

Hiroshi Hashiba*, Satoshi Yotsuhashi, Masahiro Deguchi, Yuka Yamada, Kazuhiro Ohkawa

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

9 Scopus citations


We demonstrated that the selectivity of photo electrochemical CO 2 reduction can be controlled in an inorganic artificial photosynthesis system using an AlGaN/GaN photo electrode. By increasing input light intensity and the use of a gold cathode, the Faradaic efficiency of CO dramatically increases from 30% to over 80% while that of H2 decreases. We observed that the cathode potential resulting from illumination determines the ratio of CO and H2. With this system, it is possible to switch the main reaction product from CO to HCOOH, which is also effective even under intense illumination.

Original languageEnglish (US)
Article number097102
JournalApplied Physics Express
Issue number9
StatePublished - Sep 1 2013

ASJC Scopus subject areas

  • Engineering(all)
  • Physics and Astronomy(all)


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