Electrodeposition of platinum metal on titanium and anodised titanium from P salt: Application to electro-oxidation of glycerol

Abstract

electrodes were made by galvanic deposition of platinum metal from an acid plating bath containing cis-dinitro-diammin-platinum(II) complex (P salt) onto titanium and anodic TiO 2 layer on titanium substrates respectively. Titanium oxide nanotubes were fabricated by anodising titanium foil in acid solution. Pt/Ti and Pt/TiO 2 electrodes were characterised using electrochemical methods and scanning electron microscopy. Cyclic voltammetric analysis of Pt/Ti electrodes in dilute sulphuric acid yields voltammograms with features characteristic of bulk polycrystalline platinum electrodes. In contrast, the voltammograms for Pt/TiO 2 electrodes are not quantitatively similar to those for smooth polycrystalline platinum electrodes. Voltammetry in potassium ferricyanide yields reversible voltammograms, indicating the good electrical conductivity of and connectivity between the deposited platinum and substrates and hence the absence of any significant resistive surface oxide film. The electrocatalytic behaviour of this type of electrodes in the glycerol electro-oxidation was studied.

Temperature-Dependence of Deposition Rate and Current Efficiency in Platinum Electrodeposition at a Fixed Average Current Density

“…The concentration was much higher than that in other studies [7][8][9][12][13][14] because of the lower electrical resistance of the solution and a smaller change in the concentration of platinum ions during electrodeposition.…”

“…Owing to the high cost of bulk platinum materials, they are replaced with Pt thin films. Therefore, electrodeposition of the Pt thin films is so low in cost that many kinds of electrolytes [1][2][3], additives [4][5][6], substrates for platinum electrodeposition [7][8][9], and fabricating processes have been proposed.…”

An innovative approach to electro-oxidation of dopamine on titanium dioxide nanotubes electrode modified by gold particles

“…These TiO 2 nanotubes are very promising for the immobilization of noble metal particles. Study of electro-catalytic activity of TiO 2 nanotubes modified with platinum and gold nanoparticles has shown that the modification of electrode surface by anodizing of titanium improves the electro-catalytic activity to a great extent [16,17]. Anodizing of titanium in different solutions and synthesis of TiO 2 nanotubes with high quality nano-structures, high surface-to-volume ratios and immobilization of the metal nanoparticles and nanocylinders on these TiO 2 nanotubes has reported by some authors [18][19][20][21][22][23][24][25].…”

Formation of nanocomposites of platinum with nanotubular titanium dioxide

“…During these years, researchers succeeded in preparing layers with varying morphology, thickness, and tube diameters depending on the composition of electrolyte and con ditions of polarization both on titanium and other valve metals [7][8][9][10][11][12][13][14][15]. The effect of medium (aqueous and nonaqueous electrolytes), pH, concentration of fluoride ions, anodization potential, and other factors on the principles of growth and morphology of ordered oxide layers was studied.…”