Production of syngas plus oxygen from CO2 in a gas-diffusion electrode-based electrolytic cell |
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| Authors: | Toshio YamamotoDonald A Tryk Akira Fujishima Hiroshi Ohata |
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| Affiliation: | a Department of Applied Chemistry, School of Engineering, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-8656, Japan
b Electric Power Development Co., Ltd., 6-15-1 Ginza, Chuo-ku, Tokyo 104-8165, Japan |
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| Abstract: | Most of the research published in electrochemical CO2 reduction has been reported for half-cells, with little consideration of the overall system. However, it is necessary to consider the eventual involvement of full cells. We conducted CO2 reduction and water oxidation in a CO2-reducing full cell with larger geometric surface area (2×2 cm2) and with a relatively small inter-electrode gap (1-2 mm) in order to minimize ohmic losses. The result was an ca. 1:1 CO/H2 (v/v) gas ratio at a current density of 10 mA cm−2 and a cell voltage of 3.05 V, producing O2 at the counter electrode. Based on an enthalpic voltage of 1.36 V, this constitutes an overall energy efficiency of 44.6%. |
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| Keywords: | CO2 reduction Full cell Gas diffusion electrode |
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