期刊
INTERNATIONAL JOURNAL OF GREEN ENERGY
卷 6, 期 6, 页码 646-660出版社
TAYLOR & FRANCIS INC
DOI: 10.1080/15435070903372577
关键词
Electrolysis; Steam; Carbon dioxide; Solid oxide cell; Synthesis gas
资金
- Danish National Advanced Technology Foundation
Co-electrolysis of H2O and CO2 was studied in solid oxide cells (SOCs) supported by nickel-/yittria-stabilized zirconia (Ni/YSZ) electrode. Polarization characterization indicates that electrochemical reduction of both CO2 and H2O occurs during co-electrolysis. In parallel with the electrochemical reactions, the equilibrium of the water-gas shift reaction is reached, and moreover, CO is produced via the water-gas shift reaction. The degradation observed when performing co-electrolysis in these SOCs occurs mainly at the Ni/YSZ cathode and may be a consequence of impurities in the gas stream, adsorbing on active sites in the SOC. The low degradation is most likely acceptable for long-time operation.
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