Electrocatalytic Oxidation of Methanol at the Titanium Oxide Electrode Modified with Pt Microparticles

Abstract

Abstract: The electrocatalytic oxidation of methanol at the Titanium oxide(TiO_x, x <2) film modified with Pt microparticles has been studied. The results show that the modified electrodes exhibit a significant electrocatalytic activity and good stability for the oxidation of methanol. Under the optimal conditions, the peak current density at 0.58 Vfor the oxidation of methanol in the positive-going sweep is about 526 mA/cm²at the scan rate of 5 mV/s in_0.5mol/L CH₃OH and 0.5 mol/L H₂SO₄solution and the over potential of the methanol oxidation at the modified electrode increases about 30～40 mV after 70 minutes at the current density of 100 mA/cm²and 50 mA/cm². The enhanced electrocatalytic activity and good stability are ascribed to the high dispersion of Pt microparticles in and on the TiO_x film and the synergistic effect between Pt microparticles and TiO_x.

Key words: Pt microparticles, Titanium oxide, Methanol, Electrocatalytic oxidation

CLC Number:

O646

TrendMD:

YANG Hui, XUE Kuan-Hong, LU Tian-Hong. Electrocatalytic Oxidation of Methanol at the Titanium Oxide Electrode Modified with Pt Microparticles[J]. Chem. J. Chinese Universities, 1998, 19(8): 1320.

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Electrocatalytic Oxidation of Methanol at the Titanium Oxide Electrode Modified with Pt Microparticles

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