Structural effects of adsorbed CN adlayers on the co-adsorption of OH− at the Pt(111) surface in sulfuric acid medium
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Título: | Structural effects of adsorbed CN adlayers on the co-adsorption of OH− at the Pt(111) surface in sulfuric acid medium |
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Autor/es: | Huerta Arráez, Francisco | Morallon, Emilia | Vázquez Picó, José Luis |
Grupo/s de investigación o GITE: | Electrocatálisis y Electroquímica de Polímeros |
Centro, Departamento o Servicio: | Universidad de Alicante. Departamento de Química Física |
Palabras clave: | Chemisorption | Cyanide | Electrochemical methods | Metal–electrolyte interfaces | Platinum | Single crystal surfaces | Surface structure |
Área/s de conocimiento: | Química Física |
Fecha de creación: | 22-abr-1999 |
Fecha de publicación: | 1-jul-1999 |
Editor: | Elsevier |
Cita bibliográfica: | HUERTA ARRÁEZ, Francisco; MORALLÓN NÚÑEZ, Emilia; VÁZQUEZ PICÓ, José Luis. "Structural effects of adsorbed CN adlayers on the co-adsorption of OH− at the Pt(111) surface in sulfuric acid medium". Surface Science. Vol. 431, Issues 1-3 (1 July 1999). ISSN 0039-6028, pp. L577-L581 |
Resumen: | Cyanide adlayers formed on Pt(111) were investigated at submonolayer coverages under electrochemical conditions in sulfuric acid medium. For small coverage (θ) values, cyclic voltammetry indicates the formation of surface domains of adsorbed cyanide (islands). Great distances separate the islands in such a way that the reversible adsorption of sulfate/bisulfate ions takes place quite easily on this bare area. Simultaneously, the reversible adsorption of OH− ions occurs in the gaps between adjacent clusters of each island. Increasing the coverage of CNads results in a progressive diminution of the distance between islands and, consequently, to a decrease in the extent of sulfate adsorption. Conversely, the higher θCN, the larger the number of sites for OH− adsorption (higher number of rows between hexagonal clusters). Thus, the adsorption of hydroxyl species is enhanced at high cyanide coverage in this medium. |
Patrocinador/es: | Ministerio de Educación y Ciencia (PB97-0130); European Commission (CECA 7220-PR039) |
URI: | http://hdl.handle.net/10045/7816 |
ISSN: | 0039-6028 |
DOI: | 10.1016/S0039-6028(99)00580-4 |
Idioma: | eng |
Tipo: | info:eu-repo/semantics/article |
Revisión científica: | si |
Versión del editor: | http://dx.doi.org/10.1016/S0039-6028(99)00580-4 |
Aparece en las colecciones: | INV - GEPE - Artículos de Revistas |
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Surface Science 431 (1999) L577–L581.pdf | Versión final (acceso restringido) | 209,12 kB | Adobe PDF | Abrir Solicitar una copia |
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