Glycerol Oxidation on Pd Electrodes Modified with Pt

摘要

The elelctrocatalytic oxidation of glycerol on Pd electrode modified with Pt is investigated. The Pt- modified Pd electrodes with different Pt loadings are prepared by means of potentiostatic deposition ofPt on polycrystalline Pd electrodes. Scanning electron microscope (SEM) images show that the Pdsubstrate is partially covered by the Pt nanoparticles of different sizes. The Pt modification leads to animprovement in the catalytic activity of the Pd electrode for glycerol oxidation in alkaline solution, andthe activity of the Pt-modified Pd electrodes has a close relation to the amount of the deposited Pt. In awide range of the Pt loadings, the Pt-modified Pd electrodes show higher catalytic activity than Pd andPt electrodes in terms of oxidation potential and peak current density.