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研究论文

铂钌电极上乙醇解离吸附与氧化行为的原位SERS研究

  • 张兵
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  • 江西师范大学化学化工学院,江西师范大学化学化工学院,江西师范大学化学化工学院,江西师范大学化学化工学院,江西师范大学化学化工学院,江西师范大学化学化工学院,固体表面国家重点实验室,固体表面国家重点实验室 江西南昌330027 ,江西南昌330027 ,江西南昌330027 ,江西南昌330027 ,江西南昌330027 ,江西南昌330027 ,厦门大学化学系福建厦门361005 ,厦门大学化学系福建厦门361005

收稿日期: 2005-08-28

  修回日期: 2005-08-28

  网络出版日期: 2005-08-28

Cyclic Voltammetry and Surface Enhanced Raman Spectroscopy of Dissociative Adsorption of Ethanol on Pt-Ru Electrodes

  • ZHANG Bin~
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  • (1), ZHOU Hai-hui~(1), WEN Zu-biao~(1), ZHONG Qi-ling~(*1), HUANG Peng~(1), YANG Xiong-yuan~(1),REN Bin~(2),TIAN Zhong-qun~(2)( 1. Department of Chemistry Chemical Engineering, Jiangxi Normal University, Nanchang, 330027,China,2. State Key Labortatory for Physical Chemistry, Xiamen University, Xiamen, 361005,China

Received date: 2005-08-28

  Revised date: 2005-08-28

  Online published: 2005-08-28

摘要

应用电化学循环伏安法和原位表面增强拉曼光谱研究了乙醇在Pt-Ru电极上的解离吸附与氧化行为,首次获得了酸性介质中乙醇在Pt-Ru电极上解离吸附的表面拉曼光谱.实验表明:乙醇在粗糙铂和Pt-Ru电极上均能自发地解离出强吸附中间体CO,而且在Pt-Ru电极上,强吸附中间体CO氧化的过电位比在粗糙铂电极上降低了约140mV.初步证实酸性介质中乙醇在Pt-Ru电极上的氧化遵从双途径机理.本研究结果说明,表面增强拉曼光谱技术能拓展到有实用价值的电催化体系.

本文引用格式

张兵 . 铂钌电极上乙醇解离吸附与氧化行为的原位SERS研究[J]. 电化学, 2005 , 11(3) : 289 -293 . DOI: 10.61558/2993-074X.1655

Abstract

The behaviors of dissociative adsorption of ethanol on roughened platinum-ruthenium electrode with high activity of SERS were studied by using cyclic voltammetry and in-situ surface enhanced Raman spectroscopy, surface enhanced Raman spectra of dissociative adsorption of ethanol on Pt electrode in acid was obtained for the first time. It is shown that the Pt-Ru could lower the over-potential of CO oxidation when compared to Pt electrode. The results show that the ethanol in acid medium can be self-dissociated at Pt-Ru electrode to produce CO, which discourage the further oxidation of ethanol, some information of Pt-C and Pt-C-Pt stretching vibration from linearly adsorbed and bridged-adsorbed CO located in low frequency were examined respectively. Based on the data from in-situ SERS, it was proved that the oxidation of ethanol was processed via the parallel mechanism in this paper. SERS would be also extended to the electro-catalytic systems.

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