Voltammetric characterization of stepped platinum single crystal surfaces vicinal to the (1 1 0) pole |
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Authors: | J. Souza-Garcia V. Climent J.M. Feliu |
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Affiliation: | 1. Instituto de Químicas de São Carlos, Universidade de São Paulo, Av. Trab. São-carlense, 400, CP 780, São Carlos, SP CEP 13560-970, Brazil;2. Instituto de Electroquímica, Universidad de Alicante, Apartado 99, E-03080, Alicante, Spain |
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Abstract: | Platinum stepped surfaces vicinal to the (1 1 0) crystallographic pole have been investigated voltammetrically in 0.1 M HClO4 and 0.1 M H2SO4 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. |
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