ON THE ADSORPTION OF SULFATE SPECIES ON POLYCRYSTALLINE PLATINUM - AN FTIR STUDY IN FLUORIDE BASE ELECTROLYTE

被引：58
作者：
NART, FC
IWASITA, T
机构：
[1] Institut für Physikalische Chemie der Universität Bonn
来源：
JOURNAL OF ELECTROANALYTICAL CHEMISTRY | 1991年 / 308卷 / 1-2期
关键词：
D O I：
10.1016/0022-0728(91)85073-X
中图分类号：
O65 [分析化学];
学科分类号：
070302 ; 081704 ;
摘要：
Spectra of adsorbed sulfate species on polycrystalline platinum in mildly acid solution have been analyzed as a function of the electrode potential. Maximum adsorption is observed at ca. 650 mV. Most of the adsorbed ions are in the form of sulfate, which present a split of the nu-3 band, leading to a C2-nu-symmetry. The ion is oriented with the two oxygen atoms directed towards the surface. In the platinum oxide region, the sulfate ions are included in the oxide layer and show a strong interaction with the platinum oxide. The band shift for the adsorbed species with potential is due to a complex effect of electric field and lateral interactions.
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页码：277 / 293
页数：17
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