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A verification of the reaction mechanism of direct carbon solid oxide fuel cells |
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| Authors: | Yongmin Xie Yubao Tang Jiang Liu |
| Affiliation: | 1. School of Chemistry and Chemical Engineering, South China University of Technology, 381 Wushan Road, Guangzhou, 510641, People’s Republic of China 4. Department of Chemistry, Guangdong Institute of Education, Guangzhou, 510310, People’s Republic of China 2. The Key Laboratory of Fuel Cell Technology of Guangdong Province, Ministry of Education, 381 Wushan Road, Guangzhou, 510641, People’s Republic of China 3. The Key Laboratory of Enhanced Heat Transfer and Energy Conservation, Ministry of Education, 381 Wushan Road, Guangzhou, 510641, People’s Republic of China |
| Abstract: | Anode-supported tubular solid oxide fuel cells (SOFCs) with Cu–CeO2–yttria-stabilized zirconia (YSZ) anode, YSZ electrolyte film, and silver cathode were fabricated. The cells were tested with 5 wt% Fe-loaded activated carbon and dry CO, respectively, and their performances were compared to verify the reaction mechanism of direct carbon SOFCs (DC-SOFCs). The corresponding current–voltage curves and impedance characteristics of the cells operating on these two different fuels were found to be almost the same at high temperatures, demonstrating the presumed mechanism that the anode reaction of a DC-SOFC is the electrochemical oxidation of CO, just as in a SOFC operated directly on CO. Some experimental evidences including the difference in open circuit voltage at different temperatures and the operating stability of the cells were analyzed in detail. |
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