Abstract
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.
Highlights
A significant amount of research efforts is nowadays dedicated to the search for new electrode materials aiming to improve the efficiency of a number of electrochemical processes of practical interest
In order to evaluate the electrocatalytic activity of the Ti/Nb2O5-Pt electrodes toward the oxidation of formaldehyde and methanol, cyclic voltammetry measurements were done in solutions containing 0.1 and 0.5 mol L-1 of the organic compound in 1 mol L-1 HClO solution
It was possible to prepare Pt nanoparticles dispersed on thin films of niobium oxide grown on Ti substrates by a sol-gel method
Summary
A significant amount of research efforts is nowadays dedicated to the search for new electrode materials aiming to improve the efficiency of a number of electrochemical processes of practical interest. The preparation and characterization of niobium oxide supported Pt nanoparticles obtained by a sol-gel method are reported.
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