The study of electrochemical palladium behavior using the quartz crystal microbalance II. Basic solutions

被引:0
作者
Michał Grdeń
Jan Kotowski
Andrzej Czerwiński
机构
[1] Department of Chemistry,
[2] The University of Warsaw,undefined
[3] Pasteura 1,undefined
[4] 02-093 Warsaw,undefined
[5] Poland,undefined
[6] Industrial Chemistry Research Institute,undefined
[7] Rydygiera 8,undefined
[8] 01-793 Warsaw,undefined
[9] Poland,undefined
来源
Journal of Solid State Electrochemistry | 2000年 / 4卷
关键词
Key words Palladium; Hydrogen sorption; Surface oxides; Electrochemical quartz crystal microbalance;
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摘要
The electrochemical quartz crystal microbalance (EQCMB) method has been used to evaluate the processes which occur in/on the palladium electrode in basic solutions. Hydrogen electrosorption in palladium is accompanied by an additional frequency shift that can be attributed to the stresses generated inside the Pd metal. A non-linear dependence between the mass change and the charge consumed during hydrogen oxidation in the Pd electrode has been found for hydrogen absorbed in the α- and β-phases. This effect precludes the objective estimation of the amount of hydrogen absorbed inside the Pd electrode. The EQCMB method has been used, however, for studying the surface electrode processes on the Pd electrode, i.e. specific anion adsorption, surface oxidation and dissolution. Also, the structure of the palladium oxide formed on the Pd surface during electrochemical oxidation is discussed in this paper and the effect of the anodic limiting potential on the oxide structure is reported.
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页码:273 / 278
页数:5
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