高等学校化学学报 ›› 1992, Vol. 13 ›› Issue (5): 662.

• 论文 • 上一篇    下一篇

铂电极在氯化钾溶液中电化学行为的STM和EMUV/VRS方法研究

罗瑾, 林仲华, 田昭武   

  1. 厦门大学固体表面物理化学国家重点实验室, 化学系, 厦门, 361005
  • 收稿日期:1991-05-27 出版日期:1992-05-24 发布日期:1992-05-24
  • 通讯作者: 罗瑾

Studies on Electrochemical Behaviour of Pt Electrode in KCl Solution by In situ STM and EMUV-VRS

LUO Jin, LIN Zhong-hua, TIAN Zhao-wu   

  1. State Key Laboratory for Physical Chemistry of the Solid Surface, Xiamen University, Xiamen, 361005
  • Received:1991-05-27 Online:1992-05-24 Published:1992-05-24

摘要: 用电化学现场扫描遂道显微镜(insituSTM)和电化学调制紫外可见反射光谱(EMUV/VRS)技术研究了铂电极在KCl溶液中的电化学行为,结果表明,在KCl溶液中,Pt电极阳极氧化/阴极还原过程为阳极溶解/阴极沉积过程,阳极溶解可能经历吸附的Cl-离子与Pt表面原子生成表面铂氯化物步骤,实验表明STM比EMUV/VRS具有更高的空间分辨率。

关键词: 铂, 氯化钾, 扫描遂道显微镜, 电反射谱

Abstract: The electrochemical behaviour of Pt polycrystalline electrode in 0.1 mol/L KCl solution was investigated by using in situ scanning tunneling microscopy (STM) and elect rochemically modulated UV-Vis reflection spectroscopy (EMUV-VRS).The results of STM and electrore-flectance effect show that the anodic dissolution/cathodic deposition is a dominant oxidation-reduction process of Pt electrode in the potential regions between 0.0 and 1.0 Vvs.SCE, and that the anodic process involves the formation of surface complex consisting of platinum ions and Cl- ions, and the heterogeneous dissolution of Pt electrode surface.It is also shown that STM can give much better spatial resolution than EMUV-VRS.

Key words: Platinum, Potassium chloride, Scanning tunneling microscopy, Electroreflectance spectrum

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