高等学校化学学报 ›› 2000, Vol. 21 ›› Issue (8): 1283.

• 论文 • 上一篇    下一篇

甲醇在铂修饰的氧化钛电极上电催化氧化行为的研究

杨辉1, 陆天虹1, 刘长鹏2, 刘晶华2, 孙公权2   

  1. 1. 南京师范大学化学系, 南京 210097;
    2. 中国科学院长春应用化学研究所, 长春 130022
  • 收稿日期:1999-05-20 出版日期:2000-08-24 发布日期:2000-08-24
  • 通讯作者: 陆天虹(1943年出生),男,博士,研究员,博士生导师,主要从事化学电源和生物电化学的研究.
  • 基金资助:

    国家自然科学基金(批准号:29676041);江苏省教育委员会自然科学基金资助

Studies on Electrocatalytic Performance of Titanium Oxide Electrode Modified with Pt Toward the Oxidation of Methanol

YANG Hui1, LU Tian-Hong1, LIU Chang-Peng2, LIU Jing-Hua2, SUN Gong-Quan2   

  1. 1. Department of Chemistry, Nanjing Normal University, Nanjing 210097, China;
    2. Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, China
  • Received:1999-05-20 Online:2000-08-24 Published:2000-08-24

摘要: 运用电化学方法评价了电化学阴极还原-阳极氧化两步法制得的以钛为基体的铂修饰的钛氧化物(Pt-TiOx/Ti)电极对甲醇电催化氧化的性能,结果表明,制得的修饰电极对甲醇氧化呈现了很高的电催化活性和好的稳定性.通过X光电子能谱(XPS)、扫描隧道显微镜(STM)和现场傅立叶变换红外(FTIR)反射光谱等技术,发现修饰电极对甲醇氧化具有高的电催化性能,可归属于纳米级Pt粒子在TiOx中的高度分散及由于Pt和TiOx的相互作用,使电极表面对甲醇氧化中间产物CO的吸附量大大降低.

关键词: 甲醇, Pt-TiOx/Ti电极, 电催化氧化

Abstract: Electrocatalytic performance of the Pt-TiOx /Ti electrode prepared with electrochemical reduction-oxidation method toward the oxidation of methanol has been studied. The experimental results showed that the Pt-TiOx /Ti electrode has a high electrocatalytic activity and good stability for the electrocatalytic oxidation of methanol. By means of electrochemical, XPS, STMand in-situ FTIRtechniques, it was found that one reason for the electrode to exhibit an excellent performance is attributed to the high dispersion between nanosized Pt and TiOx particles. The low adsorption ability of the intermediate derived from methanol, such as linearly adsorbed COspecies on the electrode surface due to the interaction between Pt and TiOx , also results in the excellent performance.

Key words: Methanol, Pt-TiOx/Ti electrode, Electrocatalytic oxidation

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