高等学校化学学报 ›› 1994, Vol. 15 ›› Issue (3): 401.

• 论文 • 上一篇    下一篇

乙二醇在铂电极上吸附和氧化过程的现场FTIR反射光谱研究(Ⅰ)──酸性介质

陈爱成, 孙世刚   

  1. 厦门大学固体表面物理化学国家重点实验室、化学系、物理化学研究所, 厦门, 361005
  • 收稿日期:1993-07-15 修回日期:1993-11-25 出版日期:1994-03-24 发布日期:1994-03-24
  • 通讯作者: 孙世刚
  • 作者简介:陈爱成,男,27岁,硕士,助研.
  • 基金资助:

    国家自然科学基金

In Situ FTIR Reflection Spectroscopic Studies of Adsorption and Oxidation of Ethylene Glycol on Pt Electrode(Ⅰ)──Acidic Media

CHEN Ai-Cheng, SUN Shi-Gang   

  1. State Key Laboratory for Physical Chemistry of the Solid Surface, Department of Chemistry, Institute of Physical Chemistry, Xiamen University, Xiamen, 361005
  • Received:1993-07-15 Revised:1993-11-25 Online:1994-03-24 Published:1994-03-24

摘要: 运用循环伏安法和现场FTIR反射光谱研究了酸性介质中乙二醇在铂电极上的吸附和氧化行为,指出乙二醇电催化氧化是通过解离吸附产物和反应中间体双途径机理进行的。经FTIR反射光谱检测,解离吸附产物为CO,反应中间体主要有CH2OH─COOH和HOOC─COOH等。本文还在分子水平上解释了铂电极上乙二醇吸附和氧化循环伏安特征的内在原因。

关键词: 乙二醇, 电氧化, 铂电极, 酸性介质, 循环伏安法, 现场FTIR反射光谱

Abstract: The adsorption and oxidation of ethylene glycol(EG) on Pt electrodes were investigated by in situ FTIRspectroscopy and cyclic voltammetry, The results demonstrated that EGwas oxidized on Pt electrode in acidic media via a dual path reaction mechanism, i.e.EG may be oxidized into CO2 through the dissociative adsorbate(COad)and the reactive intermediates (mainly CH2OHCOOH and HOOC-COOH species).Based on the data of in situ FTIRexperiments, the present work revealed the origin of characters observed in cyclic voltammetric experiments concerning the adsorption and oxidation of EGon Pt electrode.

Key words: Ethylene glycol, Electrooxidation, Pt electrode, Acid media, Cyclic voltammetry, In situ FTIR

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