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Citation: Zhai Run-Sheng, Cai Mao-Sheng, . XPS Evidence of Sulfate Anion Adsorption on Emersed Pt(111) in H₂SO₄ Solution[J]. Acta Physico-Chimica Sinica, ;1994, 10(08): 741-743. doi: 10.3866/PKU.WHXB19940815 shu

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

Zhai Run-Sheng ,
Cai Mao-Sheng ,

1.
State Key Laboratory for Catalysis,Chinese Academy of Sciences,Dalian 116023

Received Date: 15 March 1993
Available Online: 15 August 1994

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.
- Cyclic voltammetry curve,
- Pt(111) electrode,
- H2SO4 solution,
- XPS
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XPS Evidence of Sulfate Anion Adsorption on Emersed Pt(111) in H2SO4 Solution

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