Reaction Kinetics Study of All cis-Polyaniline Nanotube Film Modified Electrode for Fast Ascorbic Acid Detecting

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  • Ma Xuli
    Department of Chemical Engineering, Taiyuan University of Technology North Japan Research Institute for Sustainable Energy (NJRISE), Hirosaki University
  • Si Lianxi
    Department of Chemical Engineering, Taiyuan University of Technology
  • Li Xiumin
    Graduate School of Science and Technology, Hirosaki University
  • Du Haiyan
    Department of Chemical Engineering, Taiyuan University of Technology
  • Hao Xiaogang
    Department of Chemical Engineering, Taiyuan University of Technology
  • Wang Zhongde
    Department of Chemical Engineering, Taiyuan University of Technology
  • Abudula Abuliti
    North Japan Research Institute for Sustainable Energy (NJRISE), Hirosaki University
  • Guan Guoqing
    Graduate School of Science and Technology, Hirosaki University North Japan Research Institute for Sustainable Energy (NJRISE), Hirosaki University

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Abstract

<p>A reaction kinetics study was performed for all cis-polyaniline nanotube (ACPN) film modified electrode for fast ascorbic acid detecting. An ACPN film modified electrode exhibited excellent electrocatalytic activity, a low detection limit and a high sensitivity to ascorbic acid (AA). It is found that AA can be electro-catalytically oxidized on an ACPN film even at a concentration less than 1 mM. A mechanism of AA electrooxidation on the ACPN film modified electrode was proposed. Furthermore, the detection sensitivity was regulated by tuning the film thickness, and the optimized fabrication conditions for the ACPN film modified electrode was obtained. Based on the reaction kinetics study, the catalytic rate constant for the best electrode was found to be 6.3×106 cm3·mol−1·s−1. It is expected that such a sensor based on the ACPN film can be widely applied for AA detection.</p>

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