吡啶在Au电极上吸附的紫外可见反射光谱法研究

高等学校化学学报 ›› 1990, Vol. 11 ›› Issue (8): 903.

吡啶在Au电极上吸附的紫外可见反射光谱法研究

林仲华

厦门大学化学系

收稿日期:1988-09-29 出版日期:1990-08-24 发布日期:1990-08-24
基金资助:
国家自然科学基金

Studies on Adsorption of Pyridine at AU Electrode by Modulated UV/Vis Reflection Spectrometry

Lin Zhonghua

Department of Chemistry, Xiamen University, Xiamen

Received:1988-09-29 Online:1990-08-24 Published:1990-08-24

摘要/Abstract

摘要： 电化学调制紫外可见反射光谱技术可用来测定金属电极上吸附物种的取向和吸附物种与金属表面间的相互作用,金属Au与已研究过的Pb、In和Pt^[1～]具有不同形式的能带结构,吸附物种与电极表面间相互作用的电位依赖性可能不同。本文测定了吡啶分子吸附时Au电极的反射差谱,并试图从能带模型角度探讨吡啶分子与Au电极表面原子间的相互作用。

关键词: 反射差谱, 吡啶吸附, Au电极

Abstract: Both the dependence of relative change in reflectance on potential and the differential reflection spectra for Au electrode in both 0.1 mol/L NaFsolution and 0. 1 mol/L NaF, 0. 01 mol/Lpyridine solution have been measured respectively. The results show the a new band at 700 nm appeared after the surface atoms of the Au electrode were in a certain oxidized state during anodic polarization. It is assigned to charge-transfer band formed by the adsorbed pyridine molecules and the surface atoms of the Au electrode via the upper full ω-orbitals and the dangling bonds. The band was shiefted to 650 nm after the surface atoms of the Au electrode were in a higher oxidized state due to more anodic polarization.

Key words: Differential reflection spectrum, Adsorption of pyridine, Cold electrode

TrendMD:

林仲华. 吡啶在Au电极上吸附的紫外可见反射光谱法研究. 高等学校化学学报, 1990, 11(8): 903.

Lin Zhonghua. Studies on Adsorption of Pyridine at AU Electrode by Modulated UV/Vis Reflection Spectrometry. Chem. J. Chinese Universities, 1990, 11(8): 903.