TY - JOUR
T1 - Influence of the coexisting gases on the electrochemical reaction rates between 873 and 1173 K in a CH4-H2O/Pt/YSZ system
AU - Onuma, Shigenori
AU - Kaimai, Atsushi
AU - Kawamura, Kenichi
AU - Nigara, Yutaka
AU - Kawada, Tatsuya
AU - Mizusaki, Junichiro
AU - Tagawa, Hiroaki
N1 - Funding Information:
This work has been carried out as a research project by the Petroleum Energy Center with the subsidy of the Ministry of International Trade and Industry, and by New Energy and Industrial Technology Development Organization (NEDO). This study was also performed through Special Coordination Funds of the Science and Technology Agency of the Japanese Government.
PY - 2000/7/2
Y1 - 2000/7/2
N2 - The rates of electrochemical reactions were clarified in a CH4-H2O system at the interface of a porous Pt electrode/Y2O3-stabilized ZrO2 (YSZ) electrolyte between 873 and 1173 K to elucidate the kinetics of the anode reaction of solid oxide fuel cells (SOFCs). The dominant electrochemical reaction was found to be the redox process of H2/H2O, where H2 C, CO, and CO2 were formed without a current by the chemical reactions in a CH4-H2O system. The partial electrochemical reaction rates of H2, CO, C, and CH4 were determined. The rate of the electrochemical reaction of CO/CO2 in a CH4-H2O system is larger than that in a CO-CO2 system under anodic polarization at 873 and 973 K. This means both the efficiency and the rate of the utilization of fuels on SOFCs are increased.
AB - The rates of electrochemical reactions were clarified in a CH4-H2O system at the interface of a porous Pt electrode/Y2O3-stabilized ZrO2 (YSZ) electrolyte between 873 and 1173 K to elucidate the kinetics of the anode reaction of solid oxide fuel cells (SOFCs). The dominant electrochemical reaction was found to be the redox process of H2/H2O, where H2 C, CO, and CO2 were formed without a current by the chemical reactions in a CH4-H2O system. The partial electrochemical reaction rates of H2, CO, C, and CH4 were determined. The rate of the electrochemical reaction of CO/CO2 in a CH4-H2O system is larger than that in a CO-CO2 system under anodic polarization at 873 and 973 K. This means both the efficiency and the rate of the utilization of fuels on SOFCs are increased.
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U2 - 10.1016/s0167-2738(00)00647-0
DO - 10.1016/s0167-2738(00)00647-0
M3 - Article
AN - SCOPUS:0034215810
SN - 0167-2738
VL - 132
SP - 309
EP - 331
JO - Solid State Ionics
JF - Solid State Ionics
IS - 3
ER -