A novel titanium-supported nanoporous platinum(nanoPt/Ti)with a network structure was fabricated by using the hydrothermal process.Electrochemical oxidation of methanol on nanoPt/Ti was investigated in alkaline solutions for the first time.It was shown from the voltammograms that the peak current density of methanol oxidation on the nanoPt/Ti electrode increases significantly compared to the polycrystalline Pt.As shown in anodic polarization curves at 1 mV/s,the peak current density on the nanoPt/Ti is over 45 times higher than that on the polycrystalline Pt.Moreover,chronoamperometric measurements at different potentials locating round the peak potential of methanol oxidation exhibit highly stable current densities under the applied experimental conditions.
A novel titanium-supported nanoporous network platinum electrode(nanoPt)with a enormous surface area was successfully fabricated with successive hydrothermal electrolytic processes.It was shown from cyclic voltammograms in alkaline solutions that current densities during the oxidation of formic acid on the nanoPt were much higher than those on a polycrystalline platinum(Pt),and that the oxidation peak current density on the nanoPt was almost 100 times higher than on Pt.It was observed from chrono potentiometric measurements that steady-state current densities on the nanoPt were also much higher than on Pt.Oscillatory behavior was observed both on Pt and on the nanoPt electrodes,but the linear galvanic voltammograms showed that oscillation arose in a much wider range of current densities on the nanoPt than on Pt.This novel nanoporous platinum electrode could be used repeatedly and its electrocatalytic activity was stable significantly.It would be a promising anodic material used in fuel cells.
