Electrochemical properties of Au Nanoparticles

Abstract

TiO2 NPs powder (titanium oxide nanoparticles powder) is synthesized via anodization in 0.7 M HClO4 is annealed in N2 at 450°C for 3 hrs to obtain the TiO2 NPs -N2 powder as catalyst support to which Au is loaded via photodeposition technique using tetrachloroauric acid (HAuCl4) and isopropanol as a sacrificial donor. The physicochemical characterizations of TiO2 NPs arrays powder were performed by transmission electron microscopy (TEM). The TEM image suggested that Au nanoparticles were circular and there was a tendency of agglomerations. The electro-catalytic activity of Au NPs/TiO2-NTs-N2 catalysts in ferrocyanide system , KOH ,and H2SO4 electro-oxidation was examined by cyclic voltammetry (CV) and contrasted with a financially accessible polycrystalline gold electrode. Au-TiO2 NPs-N2 powder electrode catalyst displays a strikingly high electrocatalytic activity in KOH and H2SO4 solutions. The results indicate Au NPs/TiO2-NTs-N2 catalysts as a promising support material improve the excellent electro-catalytic activity for acidic and basic oxidation.