Electrochemical Impedance Study of Screen-printed Branch Structure Porous Carbon Electrode using MgO-templated Carbon and MgO Particle and its Application for Bilirubin Oxidase-immobilized Biocathode

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  • SHITANDA Isao
    Department of Pure and Applied Chemistry, Faculty of Science and Technology, Tokyo University of Science Research Institute for Science and Technology, Tokyo University of Science
  • NAKAFUJI Hiroki
    Department of Pure and Applied Chemistry, Faculty of Science and Technology, Tokyo University of Science
  • TSUJIMURA Seiya
    Division of Material Science, Faculty of Pure and Applied Science, University of Tsukuba
  • HOSHI Yoshinao
    Department of Pure and Applied Chemistry, Faculty of Science and Technology, Tokyo University of Science Research Institute for Science and Technology, Tokyo University of Science
  • ITAGAKI Masayuki
    Department of Pure and Applied Chemistry, Faculty of Science and Technology, Tokyo University of Science Research Institute for Science and Technology, Tokyo University of Science

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Abstract

A porous carbon electrode with a branch structure composed of macropores and mesopores was prepared using MgO-templated carbon and MgO particles by screen-printing. The electrode characteristics were investigated using electrochemical impedance spectroscopy. Loci of the straight line with angles at 22.5° and 45° were observed in the high- and mid-frequency ranges, respectively. A partial semicircle appeared in the low-frequency range. The impedance analysis revealed that almost the entire charge-transfer reaction occurred only at the mesopore interface of the electrode. The current density of the bilirubin oxidase (BOD)-immobilized branch structure carbon electrode was 1.3 times higher than that of the BOD-immobilized non-branch structure carbon electrode.

Journal

  • Electrochemistry

    Electrochemistry 83 (5), 329-331, 2015

    The Electrochemical Society of Japan

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