Photoelectrochemical Reduction of Highly Concentrated CO2 Using a p-InP Electrode

Chem. J. Chinese Universities ›› 1995, Vol. 16 ›› Issue (S1): 218.

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Photoelectrochemical Reduction of Highly Concentrated CO₂ Using a p-InP Electrode

Tryk D.A.¹, Hirota K.¹, Hashimoto K.¹, Fujishima A.¹, Omata K.², Kimura N.²

1. Department of Applied Chemistry, Faculty of Engineering, University of Tokyo, Hongo, Bunkyo-ku, Tokyo 113, Japan;
2. Electric Power Development Co., Ltd., Jinza, Chuo-ku, Tokyo 104, Japan

Received:1995-08-25 Online:1995-12-31 Published:1995-12-31

Abstract

Abstract:

Carbon dioxide was photoelectrochemically reduced at a p-type InP photocathode in highly concentrated CO₂ solution in methanol at elevated pressure (40 atm). Relatively high current densities were achieved (200 mA/cm²) with high current efficiencies for CO production (~90%). These current densities are approximately an order of magnitude higher than those reported previously in the literature for photoelectrochemical reduction due to the very high CO₂ concentration (~8 mol/L). Other products were hydrogen and methyl formate (produced via reaction between formic acid and the methanol solvent), Hydrocarbons were produced in only trace amounts.

Key words: Carbon dioxide, Photoelectrochemical reduction, p-type InP photoelectrode, Carbon monooxide production

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Tryk D.A., Hirota K., Hashimoto K., Fujishima A., Omata K., Kimura N.. Photoelectrochemical Reduction of Highly Concentrated CO₂ Using a p-InP Electrode[J]. Chem. J. Chinese Universities, 1995, 16(S1): 218.

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Photoelectrochemical Reduction of Highly Concentrated CO₂ Using a p-InP Electrode

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