Photo-induced CO2 Reduction with GaN Electrode in Aqueous System

CO 2 reduction with water and light illumination is realized using a gallium nitride (GaN) photoelectrode in which excited electrons induce CO 2 conversion at the counter electrode. For the counter electrode, a copper (Cu) plate was chosen. The low affinity and wide gap of the nitride semiconductor...

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Bibliographic Details
Published in:Applied physics express 2011-11, Vol.4 (11), p.117101-117101-3
Main Authors: Yotsuhashi, Satoshi, Deguchi, Masahiro, Zenitani, Yuji, Hinogami, Reiko, Hashiba, Hiroshi, Yamada, Yuka, Ohkawa, Kazuhiro
Format: Article
Language:English
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Summary:CO 2 reduction with water and light illumination is realized using a gallium nitride (GaN) photoelectrode in which excited electrons induce CO 2 conversion at the counter electrode. For the counter electrode, a copper (Cu) plate was chosen. The low affinity and wide gap of the nitride semiconductor enable us to create an electron--hole pair which has a sufficient energy for both CO 2 reduction and water oxidation, in spite of the fact that a high energy for CO 2 reduction is required. Within this system, the generation of formic acid (HCOOH) with 3% Faradic efficiency was confirmed by light illumination alone.
ISSN:1882-0778
1882-0786
DOI:10.1143/APEX.4.117101