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.