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Jpn. J. Appl. Phys. 44 (2005) pp. L543-L545  |Previous Article| |Next Article|  |Table of Contents|
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Letter

Hydrogen Gas Generation by Splitting Aqueous Water Using n-Type GaN Photoelectrode with Anodic Oxidation

Katsushi Fujii¹, Takeshi Karasawa² and Kazuhiro Ohkawa^1,3

¹Nakamura Inhomogeneous Crystal Project, Exploratory Research for Advanced Technology, Japan Science and Technology Agency, Department of Applied Physics, Tokyo University of Science, 1-3 Kagurazaka, Shinjyuku, Tokyo 162-8601, Japan
²Research and Development Center, Technology and Engineering Division, Lamp Company, Usio Incorporated, 1194 Sazuchi, Bessho-cho, Himeji, Hyogo 671-0224, Japan
³Department of Applied Physics, Tokyo University of Science, 1-3 Kagurazaka, Shinjyuku, Tokyo 162-8601, Japan

(Received February 16, 2005; accepted March 7, 2005; published April 15, 2005)

Hydrogen gas generation from a counterelectrode was clearly observed for the first time using light-illuminated n-type GaN as a working photoelectrode in an electrolyte. The application of extra bias to a working electrode was required to obtain a sufficient volume of generated gas. The reactions at the GaN photoelectrode were both GaN decomposition and water oxidization, simultaneously.

URL: http://jjap.jsap.jp/link?JJAP/44/L543/
DOI: 10.1143/JJAP.44.L543

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