| Texto completo | |
| Autor(es): |
Oliveira, R. T. S.
;
Bulhões, Luis Otavio de Sousa
;
Pereira, E. C.
;
Santos, Mauro Coelho dos
[4]
Número total de Autores: 4
|
| Tipo de documento: | Artigo Científico |
| Fonte: | Journal of Electroanalytical Chemistry; v. 569, n. 2, p. 233-240, Aug. 2004. |
| Área do conhecimento: | Ciências Exatas e da Terra - Química |
| Assunto(s): | Voltametria |
| Resumo | |
This paper describes Rh electrodeposition on Pt electrodes in HClO4 solutions. Using cyclic voltammetry (CV), coupled with electrochemical quartz crystal microbalance (EQCM) studies, we determined the main characteristics related to oxide formation on rhodium deposited on platinum. During the deposition, the results demonstrated that Rh0 ad-atoms are stable on Pt in the potential range investigated at different saturation coverages. Data obtained using EQCM and CV show that the number of electrons transferred in the oxidation of Rhads on Pt is 3 and a Rh(OH)3 species was proposed as the adsorbed product. At potentials higher than 1.0 V, Rh(OH)3 is oxidized to RhO(OH)3. This species is reduced to Rh(OH)3 and then to Rh0 during the negative potential sweep. (AU) | |
| Processo FAPESP: | 01/06029-3 - Eletrocatalise da oxidacao de pequenas moleculas organicas com eletrodos modificados. |
| Beneficiário: | Mauro Coelho dos Santos |
| Modalidade de apoio: | Bolsas no Brasil - Pós-Doutorado |