Voltammetric characterization of stepped platinum single crystal surfaces vicinal to the (1 1 0) pole

Platinum stepped surfaces vicinal to the (1 1 0) crystallographic pole have been investigated voltammetrically in 0.1 M HClO 4 and 0.1 M H 2SO 4 solutions. Changes in the voltammetric profile with the step density suggest the existence of two types of surface sites, that has been ascribed to linear...

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Bibliographic Details
Published in:Electrochemistry communications 2009-07, Vol.11 (7), p.1515-1518
Main Authors: Souza-Garcia, J., Climent, V., Feliu, J.M.
Format: Article
Language:English
Subjects:
Chemistry
CO displacement
Cyclic voltammetry
Electrochemistry
Electrodes: preparations and properties
Exact sciences and technology
General and physical chemistry
Other electrodes
Platinum single crystal
Potential of zero total charge
Stepped surfaces
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Summary:Platinum stepped surfaces vicinal to the (1 1 0) crystallographic pole have been investigated voltammetrically in 0.1 M HClO 4 and 0.1 M H 2SO 4 solutions. Changes in the voltammetric profile with the step density suggest the existence of two types of surface sites, that has been ascribed to linear and bidimensional domains. This result indicates the existence of important restructuring processes that separate the real surface distribution from the nominal one. The electronic properties of the surfaces have been characterized with the CO charge displacement method and the potential of zero total charge has been calculated as a function of the step density.
ISSN:1388-2481
1873-1902
DOI:10.1016/j.elecom.2009.05.044