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Ethanol Electrooxidation on Bi Submonolayers Deposited on a Pt Electrode

机译:沉积在Pt电极上的Bi亚单层上的乙醇电氧化

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摘要

Bismuth submonolayers covering polycrystalline platinum-surface electrodes have been prepared with several degrees of Bi covering 0.34, 0.58, and 0.92 monolayers, respectively. These samples were used to investigate ethanol electrooxidation using cyclic voltammetry, chronoamperometry, and electrochemical impedance spectroscopy. Suppression of hydrogen adsorption was observed as the degree of Bi covering on the Pt surface increased. Ethanol electrooxidation increased 5.5-fold for Pt/Bi0.34ML compared with Pt using constant potential polarization at 0.5 V. Electrochemical impedance experiments showed that Pt/Bi0.34ML electrodes exhibited the lowest charge transfer resistance, which is in agreement with voltammetric and chronoamperometric measurements.
机译:已经制备了覆盖多晶铂表面电极的铋亚单层,其铋的几度分别覆盖了0.34、0.58和0.92单层。这些样品用于研究使用循环伏安法,计时电流法和电化学阻抗谱的乙醇电氧化。随着Bi在Pt表面上的覆盖程度增加,氢吸附被抑制。 Pt / Bi0.34ML 的乙醇电氧化性能比使用0.5 V恒定电位极化的Pt高5.5倍。电化学阻抗实验表明Pt / Bi0.34ML 电极表现出最低的电荷转移电阻,与伏安法和计时安培法测量值一致。

著录项

  • 来源
    《Electrocatalysis》 |2011年第3期|p.224-230|共7页
  • 作者单位

    Laboratório Interdisciplinar de Eletroquímica e Cerâmica (LIEC), Centro Multidisciplinar para o Desenvolvimento de Materiais Cerâmicos, Departamento de Química, Universidade Federal de São Carlos, C.P.: 676–CEP: 13565–905, São Carlos, SP, Brazil;

    Laboratório de Eletroquímica, Faculdade de Ciências Exatas e Tecnologia, Universidade Federal dos Vales do Jequitinhonha e Mucuri (UFVJM), Rodovia MGT 367, Km 583, nº 5000, Alto da Jacuba, Diamantina, MG, Brazil;

    Laboratório de Eletroquímica e Materiais Nanoestruturados (LEMN), Centro de Ciências Naturais e Humanas (CCNH), Universidade Federal do ABC (UFABC), CEP: 09210–170, Rua Santa Adélia 166, Bairro Bangu, Santo André, SP, Brazil;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Submonolayer; Bismuth deposition; Ethanol electrooxidation;

    机译:亚单层;铋沉积;乙醇电氧化;

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