高等学校化学学报

高等学校化学学报 ›› 2002, Vol. 23 ›› Issue (8): 1498.

• 研究简报 • 上一篇    下一篇

中性溶液中抗坏血酸在六氰合亚铁酸钴铜膜修饰铂电极上现场红外光谱电化学研究

汪夏燕1, 崔兴品1, 崔运梅2, 金葆康2, 林祥钦1   

  1. 1. 中国科学技术大学化学系, 合肥 230026;
    2. 安徽大学化学系, 合肥 230039
  • 收稿日期:2001-08-16 出版日期:2002-08-24 发布日期:2002-08-24
  • 通讯作者: xqlin@ustc.edu.cn
  • 作者简介:林祥钦(1946年出生),男,教授,博士生导师,从事电分析化学、生物电化学和光谱电化学研究.E-mail:xqlin@ustc.edu.cn
  • 基金资助:

    中国科学技术大学高水平大学建设重点科研项目(批准号:KY2216)资助

Investigation of Electrochemical Oxidation of L-Ascorbic Acid at CoCuHCF/Pt Electrode in Neutral Solutions by In situ FTIRRAS

WANG Xia-Yan1, CUI Xing-Pin1, CUI Yun-Mei2, JIN Bao-Kang2, LIN Xiang-Qin1   

  1. 1. Department of Chemistry, University of Science and Technology of China, Hefei 230026, China;
    2. Department of Chemistry, Anhui University, Hefei 230039, China
  • Received:2001-08-16 Online:2002-08-24 Published:2002-08-24

PDF (PC)

被引次数

25

关键词: 抗坏血酸, 六氰合亚铁酸钴铜, 化学修饰电极, 电催化, 现场红外反射吸收光谱

Abstract: Electrochemical oxidation reactions of L-ascorbic acid(AA) at a copper cobalt hexacyanoferrate modified electrode (CoCuHCF/Pt) in neutral solutions were studied in comparison with that at a bared Pt electrode by in situ FTIRreflection absorption spectroscopy(FTIRRAS). The results indicated that the electrode oxidation of AAat both the electrodes CoCuHCFfollowed by chemical processes. AAis oxidized to dehydro-L-ascorbic acid(DHA) followed by a chemical hydration process. At Pt electrode, the DHAunderwent hydration reaction to form bicyclic product, which then further was transformed into 2, 3-diketogulonic acid and its enol form via an opening of lactone ring. However, at CoCuHCF/Pt electrode, the DHAundergoes ring opening reaction and then degradation reaction.

Key words: L Ascorbic acid, Copper cobalt hexacyanoferrate, Chemically modified electrode, Electrocatalysis, In situ FTIRRAS

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