物理化学学报 >> 1994, Vol. 10 >> Issue (08): 741-743.doi: 10.3866/PKU.WHXB19940815

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硫酸溶液中Pt(111)电极面上存在SO2-4的XPS证据

翟润生, 蔡茂盛, D.M.Kolb   

  1. 中国科学院大连化学物理研究所催化基础研究国家实验室，大连 116023|德国Fritz-Haber研究所；德国Ulm大学
  • 收稿日期:1993-03-15 修回日期:1993-09-13 发布日期:1994-08-15
  • 通讯作者: 翟润生

XPS Evidence of Sulfate Anion Adsorption on Emersed Pt(111) in H2SO4 Solution

Zhai Run-Sheng, Cai Mao-Sheng, D.M.Kolb   

  1. State Key Laboratory for Catalysis,Chinese Academy of Sciences,Dalian 116023|Fritz-Haber-Institute der Max-Planck-Gesellschaft,Germany;University Ulm,Germany
  • Received:1993-03-15 Revised:1993-09-13 Published:1994-08-15
  • Contact: Zhai Run-Sheng

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关键词: 循环伏安图, Pt(111)电极, 硫酸溶液, XPS

Abstract:

A detailed study of the cyclic voltammetry curve of Pt(111) electrode in H2SO4 solution by X-ray photoe1ectron spectroscopy (XPS) and a low energy electron diffraction (LEED) has provided firstly direct evidence that the anomalous features reported originally by Clavilier et al. are associated with the specific adsorption of sulfate anions rather than hydrogen adsorption. The (√3×√3)R30°structure on Pt(111) obtained after electrode emersion on the positive scan at more positive potentials than 0.23V vs. Ag/AgCl appears simultaneously with sharp increase of XPS of O1s and S2p. This implies the relationship between anomalous peak and sulfate anion adsorption on emersed Pt(111 ) electrode.

Key words: Cyclic voltammetry curve, Pt(111) electrode, H2SO4 solution, XPS