Preparation and electrochemical characterization of Pt nanoparticles dispersed on niobium oxide

• Autor(a) principal: Mello,R. L. S.
• Data de Publicação: 2003
• Outros Autores: Mattos-Costa,F. I., Villullas,H. de las M., Bulhões,L. O. de S.
• Tipo de documento: Relatório
• Idioma: eng
• Título da fonte: Eclética Química
• Texto Completo: http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0100-46702003000200009
• topic: Pt nanoparticles; sol-gel; electrocatalysis; niobium oxide

Electrodes consisting of Pt nanoparticles dispersed on thin films of niobium oxide were prepared onto titanium substrates by a sol-gel method. The physical characterization of these electrodes was carried out by X-ray diffraction, scanning electron microscopy and energy dispersive X-ray analysis. The mean size of the Pt particles was found to be 10.7 nm. The general aspects of the electrochemical behavior were studied by cyclic voltammetry in 1 mol L-1 HClO4 aqueous solution. The response of these electrodes in relation to the oxidation of formaldehyde and methanol in acidic media was also studied.