An FTIR Study of the Catalytic Activity of a 85:15 Pt:Ru Alloy for Methanol Oxidation

Abstract

Abstract In situ Fourier Transform Infrared Spectroscopy is used to study the catalytic properties of a Pt/Ru alloy as compared to pure platinum. Spectra taken at different potentials show the different behaviour of both metals with respect to methanol adsorption and oxidation. In the potential region below 700 mV the presence of Ru atoms increases the electrocatalytic activity of platinum. In the case of the alloy the poisoning adsorbate CO ad is adsorbed to a less extent and its seems to be weaker bonded to the Pt/Ru than to the Pt surface.