高等学校化学学报

高等学校化学学报

• 研究简报 • 上一篇    下一篇

镉电极上的衰减全反射表面增强红外光谱

李巧霞1, 严彦刚1, 徐群杰2, 蔡文斌1, 2   

    1. 复旦大学化学系, 上海分子催化与功能材料重点实验室, 上海200433;
    2. 上海电力学院环境工程系, 上海200090
  • 收稿日期:2006-04-13 修回日期:1900-01-01 出版日期:2006-12-10 发布日期:2006-12-10
  • 通讯作者: 蔡文斌

Attenuated-total-reflection Surface-enhanced Infrared Absorption Spectroscopy on Cadmium Electrode

LI Qiao-Xia1, YAN Yan-Gang1, XU Qun-Jie2, CAI Wen-Bin1,2   

    1. Department of Chemistry, Fudan University, Shanghai Key Laboratory for Molecular Catalysis and Innovation Material, Shanghai 200433, China;
    2. Department of Environmental Engineering, Shanghai University of Electric Power, Shanghai 200090, China
  • Received:2006-04-13 Revised:1900-01-01 Online:2006-12-10 Published:2006-12-10
  • Contact: CAI Wen-Bin

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被引次数

28

摘要： 利用两步“湿法镀膜”方法将ATR-SEIRAS的研究进一步拓展到ⅡB族Cd电极上. 选择吡啶(Py)作为模型分子, 初步比较了Py在不同金属电极表面上的吸附构型.

关键词: 衰减全反射表面增强红外光谱, 镉膜电极, 吡啶, 吸附

Abstract: Surface-enhanced IR absorption spectroscopy in attenuated-total reflection(ATR-SEIRAS) configuration was extended for the first time to a cadmium electrode with the adsorption of pyridine as the model system. The SEIRAS active Cd film electrode was prepared by electrodeposition of Cd mulitlayers onto a underlying Au nanofilm on Si in 0.01 mol/L CdSO4 +0.1 mol/L KClO4. The morphology of the as-prepared Cd film exhibits an island structure. In the potential range of -1.2 to -0.8 V(vs. SCE), only in-plane vibrations belonging to the A1 symmetry were detected whereas those to the B1 symmetry virtually were not, suggesting that pyridine coordinates vertically or at a little angle to the Cd electrode surface via its nitrogen end without edge-tilted rotation of its ring plane. The Py adsorption configuration is closed to that found on a Au electrode, but different from that on a Ni or Pt electrode, which may be assigned to different structures of valence electron shells for the substrate metals.

Key words: ATR-SEIRAS, Cd film electrode, Pyridine, Adsorption

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