J. Technology and Education, Vol.14, No.1, pp.11-14, 2007

研究論文

　

人工光合成に向けた二液分離型光化学ダイオードの応用

　

大西 康幸、松本 雅至、垣内 祐紀子、泉 生一郎*

奈良工業高等専門学校　物質化学工学科（〒639-1080　奈良県大和郡山市矢田町22）

*izumi@chem.nara-k.ac.jp

　

Application of a Product-separable Photochemical Diode for Artificial Photosynthesis

　

Yasuyuki OHNISHI, Masashi MATSUMOTO, Yukiko KAITO, Ikuichiro IZUMI*

Nara National College of Technology (22 Yata, Yamatokoriyama, Nara 639-1080, Japan)

　

(Received January 25, 2007; Accepted March 7, 2007)

　

　We have developed a simple photoenergy conversion system, which is called a product-separable photochemical diode. Using this system, the photochemical reactions of oxidation and reduction could be induced individually in a dual electrolyte cell. In the present work, the n-TiO₂/Ti type photochemical diode was applied to artificial photosynthesis, such as a production of methane from CO₂ reduction and an evolution of hydrogen from water decomposition. The CO₂ reduction and hydrogen evolution were prompted catalytically by Cu and Pt deposited on Ti surfaces, respectively.

Key Words: TiO₂, CO₂ reduction, Hydrogen evolution, Photochemical diode