Determination of the electrode kinetic parameters of a species immobilized on electrodes using the electroreflectance (ER) voltammogram

Zhi Qiang Feng, Shinichiro Imabayashi, Takashi Kakiuchi, Katsumi Niki

研究成果: Article査読

25 被引用数 (Scopus)

抄録

Ac-modulated UV-vis reflectance spectroscopy was applied to elucidate the electrode reaction rate of the species immobilized on electrode surfaces. The electroreflectance (ER) with respect to the electrode potential at constant wavelength, denoted as ER voltammetry, was analyzed theoretically using numerical calculation. In the present calculation, the amplitude of the ac modulation, the IR drop due to the solution resistance, and the double layer capacitance were taken into account. The results of the calculation were compared to the electrode reaction of cytochrome c immobilized on an SH(CH2)9COOH self-assembled monolayer modified gold electrode, which has previously been studied. The standard rate constant of the electrode reaction of cytochrome C3 adsorbed directly on gold electrode was determined to be 200 s-1 using non-linear least square fitting to the experimental data. This approach is applicable to unstable redox species at the electrode surface, e.g. cytochrome c3, which desorbs gradually from the gold electrode surface at negative electrode potential. That is, one can determine the kinetic parameters of adsorbed redox species by a single potential scan.

本文言語English
ページ(範囲)15-20
ページ数6
ジャーナルJournal of Electroanalytical Chemistry
408
1-2
DOI
出版ステータスPublished - 1996 5月 30
外部発表はい

ASJC Scopus subject areas

  • 分析化学
  • 化学工学(全般)
  • 電気化学

フィンガープリント

「Determination of the electrode kinetic parameters of a species immobilized on electrodes using the electroreflectance (ER) voltammogram」の研究トピックを掘り下げます。これらがまとまってユニークなフィンガープリントを構成します。

引用スタイル