The catalytic electroreduction of oxygen in an aqueous solution on glassy carbon electrodes covalently modified with [5,10,15,20-tetrakis(4-carboxyphenyl)porphinato]iron(III).

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概要

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• The catalytic electroreduction of an oxygen molecule on a glassy carbon electrode covalently modified with [5,10,15,20-tetrakis(4-carboxyphenyl)porphinato]iron(III) (abbreviated as GC-O-Fe(III)TCPP) was investigated in an aqueous solution. The reduction of oxygen on the GC-O-Fe(III)TCPP electrode occurs at a more anodic potential than on the glassy carbon electrode adsorbing Fe(III)TCPP. This anodic shift of the oxygen reduction potential may be closely related to the number of bonds between a metalloporphyrin molecule and the electrode material. The oxygen molecule is reduced via the one-step reduction accompanying four-electron and four-proton transfer at pH 7–11 and via two successive reductions accompanying two-electron transfer and subsequently two-electron and four-proton transfer at pH>11.5. At pH<6, the number of transferred electron could not be reproducibly determined because of the cleavage of several ester linkages.

• 公益社団法人 日本化学会の論文

著者

• Ujimoto Kikujiro

  Department Of Chemistry Faculty Of Science Fukuoka University

• Kurihara Hirondo

  Department Of Chemistry Faculty Of Science Fukuoka University

• Arifuku Fumihiro

  Department Of Chemistry Faculty Of Science Fukuoka University

• Iwatani Keizo

  Department of Chemistry, Faculty of Science, Fukuoka University

関連論文

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• Protolytic kinetics of some pyridine derivatives in non-buffered aqueous solution.
• Electrochemical and spectroelectrochemical of [5-phenyl-10,15,20-tris(4-sulfonatophenyl)porphinato]iron in aqueous solution.
• The catalytic electroreduction of oxygen in an aqueous solution on glassy carbon electrodes covalently modified with [5,10,15,20-tetrakis(4-carboxyphenyl)porphinato]iron(III).
• The axial-ligand replacement of the (Tetrakis(1-methyl-4-pyridinio)porphine)iron(III) ion by the cyanide ion in a highly alkaline aqueous solution.
• Spectrophotometric and electrochemical investigations of (tetrakis(1-methylpyridinium-4-yl)porphine)iron(III) ion in aqueous solution.
• Thermal Behavior and Structure of Low-temperature Water Confined in Sephadex G15 Gel by Differential Scanning Calorimetry and X-ray Diffraction Method

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