Voltammetric and spectroscopic characterization of cyanide adlayers on Pt(h,k,l) in an acidic medium
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Título: | Voltammetric and spectroscopic characterization of cyanide adlayers on Pt(h,k,l) in an acidic medium |
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Autor/es: | Huerta Arráez, Francisco | Morallon, Emilia | Vázquez Picó, José Luis | Aldaz Riera, Antonio |
Grupo/s de investigación o GITE: | Electrocatálisis y Electroquímica de Polímeros |
Centro, Departamento o Servicio: | Universidad de Alicante. Departamento de Química Física |
Palabras clave: | Cyanide | Electrochemical methods | Infrared absorption spectroscopy | Low index single crystal surfaces | Metal-electrolyte interfaces | Platinum |
Área/s de conocimiento: | Química Física |
Fecha de creación: | 18-ago-1998 |
Fecha de publicación: | 20-ene-1998 |
Editor: | Elsevier |
Cita bibliográfica: | HUERTA ARRÁEZ, Francisco, et al. "Voltammetric and spectroscopic characterization of cyanide adlayers on Pt(h,k,l) in an acidic medium". Surface Science. Vol. 396, Issues 1-3 (20 Jan. 1998). ISSN 0039-6028, pp. 400-410 |
Resumen: | Irreversibly adsorbed cyanide adlayers formed on single-crystal platinum electrodes were studied by cyclic voltammetry and in-situ FTIR spectroscopy in a perchloric medium. A vibrational band around 2100 cm−1 was assigned to the C-N stretching vibration of adsorbed cyanide on the three electrode surfaces. Cyanide adlayers seem to be stable on Pt(111) in a wide range of potentials. Tuning rates of 100 and 30 cm−1 V−1 were measured for the band at 2100 cm−1 below and above 0.5 V, respectively. Adsorbed cyanide has a complex behavior on Pt(100). The polarization of the cyanide-covered Pt(100) electrode in the potential region below 0.4 V (RHE) leads to the formation of a CO adlayer (band at 1820 cm−1). The oxidation of adsorbed cyanide on the Pt(100) electrode produces CO2 (band at 2344 cm−1) and adsorbed NO (band at 1624 cm−1), which shows a characteristic voltammetric behavior. Adsorbed cyanate (band at 2175 cm−1) was also identified as an intermediate product during adsorbed cyanide oxidation on Pt(100). Finally, for Pt(110), adsorbed cyanide is slowly desorbed below 0.1 V (RHE). |
Patrocinador/es: | Generalitat Valenciana; DGCYT (PB93/0944) |
URI: | http://hdl.handle.net/10045/7815 |
ISSN: | 0039-6028 |
DOI: | 10.1016/S0039-6028(97)00694-8 |
Idioma: | eng |
Tipo: | info:eu-repo/semantics/article |
Revisión científica: | si |
Versión del editor: | http://dx.doi.org/10.1016/S0039-6028(97)00694-8 |
Aparece en las colecciones: | INV - GEPE - Artículos de Revistas INV - LEQA - Artículos de Revistas |
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Surface Science 396 (1998) 400-410.pdf | Versión final (acceso restringido) | 874,93 kB | Adobe PDF | Abrir Solicitar una copia |
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