Application of the SPE method to organic electrochemistry. IX. Reaction profiles of an iron redox couple incorporated into Pt-Nafion with ascorbic acid.
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概要
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Fe<SUP>3+</SUP> has been incorporated into Pt–Nafion. The behavior of Fe<SUP>3+</SUP> as a mediator was examined in detail in a system comprising the oxidation of L-ascorbic acid (AA) to dehydroascorbic acid (AD). The diffusion of AA in Nafion is slower than that of Fe<SUP>3+</SUP>. The concentration profiles of Fe<SUP>3+</SUP> and AA in Pt–Nafion have been clarified and a reaction of the mediator with AA took place within a very narrow zone close to the surface. The averaged diffusion coefficients of Fe<SUP>3+</SUP> and AA are 1.5×10<SUP>−7</SUP> cm<SUP>2</SUP> s<SUP>−1</SUP> and 4.7×10<SUP>−8</SUP> cm<SUP>2</SUP> s<SUP>−1</SUP>, respectively.
- 公益社団法人 日本化学会の論文
著者
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Ogumi Zempachi
Department Of Energy & Hydrocarbon Chemistry Graduate School Of Engineering Kyoto University
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Takehara Zen-ichiro
Department Of Chemical Engineering Faculty Of Engineering Kansai University
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Mizoe Toshiyuki
Department of Industrial Chemistry, Faculty of Engineering, Kyoto University
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