Research Cluster of Study for Energy Conversion

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Realization of Efficient Energy Conversion for Next Generation

Tatsuya TAKEGUCHI

Atsushi FUKUOKA (CRC, Hokkaido Univ.), Miho YAMAUCHI (Kyushu Univ.), Shen YE, CRC (Hokkaido Univ.), Masahiro SADAKANE (Hiroshima Univ.), Hiroki HABAZAKI (Hokkaido Univ.), Toshiro YAMANAKA (Kyoto Univ.), Shin MUKAI (Hokkaido Univ.), Saburo HOSOKAWA (Kyoto Univ.), Teruki MOTOHASHI (Hokkaido Univ.), Masaaki UEMURA (UECO), Isao OGINO (Hokkaido Univ.), Tadatoshi MUROTA (Santoku Corporation), Etsuji TSUJI (Hokkaido Univ.), Yoshiharu UCHIMOTO (Kyoto Univ.), Ryu ABE (Kyoto Univ.)

In this cluster, electrocatalysts for alkaline fuel cell (AFC), polymer electrolyte fuel cell (PEFC), and air electrode for metal-air buttery are developed. For the residential PEFC system, the mechanism of CO tolerance was investigated. The rate of CO oxidation reaction (rCO₂) is proportional to θCO(Pt-Ru) θ_OH(Ru)exp(aE) , where a and E are a constant and anode potential, respectively. Logarithms of conversion rate (∝ r_CO2/P_CO) divided by I² were plotted against anode potential (E) to investigate the effect of anode potential on CO electrooxidation in an MEA under operation conditions. The ln(r_CO2/P_COI²) values seem to be independent of anode potential of E Catalytic shift reaction contributes to CO tolerance.