CO2 Conversion with Light and Water by GaN Photoelectrode

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 th...

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Bibliographic Details
Published in:Jpn J Appl Phys 2012-02, Vol.51 (2), p.02BP07-02BP07-3
Main Authors: Yotsuhashi, Satoshi, Deguchi, Masahiro, Zenitani, Yuji, Hinogami, Reiko, Hashiba, Hiroshi, Yamada, Yuka, Ohkawa, Kazuhiro
Format: Article
Language:English
Online Access:Get full text
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Summary: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.
ISSN:0021-4922
1347-4065
DOI:10.1143/JJAP.51.02BP07