Oxidation of methylamine and ethylamine on Pt single crystal electrodes in acid medium
Por favor, use este identificador para citar o enlazar este ítem:
http://hdl.handle.net/10045/7812
Título: | Oxidation of methylamine and ethylamine on Pt single crystal electrodes in acid medium |
---|---|
Autor/es: | Huerta Arráez, Francisco | Morallon, Emilia | Pérez Martínez, Juan Manuel | 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: | Ethylamine | Methylamine | Single crystal electrodes | Platinum electrodes | FT-IRRAS |
Área/s de conocimiento: | Química Física |
Fecha de creación: | 27-abr-1999 |
Fecha de publicación: | 1-jul-1999 |
Editor: | Elsevier |
Cita bibliográfica: | HUERTA ARRÁEZ, Francisco, et al. "Oxidation of methylamine and ethylamine on Pt single crystal electrodes in acid medium". Journal of Electroanalytical Chemistry. Vol. 469, Issue 2 (9 July 1999). ISSN 0022-0728, pp. 159-169 |
Resumen: | Cyclic voltammetry (CV) and Fourier transform infrared reflection-absorption spectroscopy (FT-IRRAS) have been combined to analyse the oxidation of methylamine and ethylamine on platinum single crystal electrodes in an acidic medium. The oxidation of both amines on Pt(hkl) electrodes gives rise to the formation of adsorbed cyanide ad-layers, which have been detected by in situ infrared spectroscopy. In the case of Pt(111) the resulting adsorbed cyanide is rather stable but, on the contrary, the adsorbed CN-like species is highly reactive on Pt(100). It yields either adsorbed NO and CO2 when the electrode is polarised above 0.7 V or adsorbed CO below 0.4 V. The detection of adsorbed cyanide is difficult to achieve at the Pt(110) surface. In the case of ethylamine, these adsorbed species are present in lower coverage than for methylamine. The substitution of one hydrogen atom by a methyl group in the methylamine makes the amine molecule more stable. So, the behaviour of ethylamine provides evidence for its lower electrochemical reactivity when compared with that of the methylamine molecule. |
Patrocinador/es: | Consellería de Educación y Ciencia de la Generalitat Valenciana; Dirección General de Ciencia y Tecnología (PB97-0130). |
URI: | http://hdl.handle.net/10045/7812 |
ISSN: | 0022-0728 |
DOI: | 10.1016/S0022-0728(99)00206-5 |
Idioma: | eng |
Tipo: | info:eu-repo/semantics/article |
Revisión científica: | si |
Versión del editor: | http://dx.doi.org/10.1016/S0022-0728(99)00206-5 |
Aparece en las colecciones: | INV - GEPE - Artículos de Revistas INV - GEM - Artículos de Revistas INV - LEQA - Artículos de Revistas |
Archivos en este ítem:
Archivo | Descripción | Tamaño | Formato | |
---|---|---|---|---|
Journal of Electroanalytical Chemistry 469 (1999) 159–169.pdf | Versión final (acceso restringido) | 258,67 kB | Adobe PDF | Abrir Solicitar una copia |
Todos los documentos en RUA están protegidos por derechos de autor. Algunos derechos reservados.