Showing papers by "Andrew Hamnett published in 2007"

In-situ FTIR spectroscopic studies of the adsorption and oxidation of small organic molecules at the Ru(0001) electrode under various conditions

Abstract: Publisher Summary This chapter illustrates the in-situ Fourier transform infrared spectroscopic (FTIR) studies of the adsorption and oxidation of small organic molecules at the Ru(0001) electrode under various conditions Pt and Ru are central to electrocatalysis in the fuel cell applications; in the case of methanol and carbon monoxide (CO) electrocatalysis, the most active catalyst is binary PtRu In-situ FTIR spectra can be collected from the CO-saturated surface at successively higher potentials This rate also increases with temperature The formation of distinct domains for the co-adsorption of CO and oxygen on Ru(0001) surfaces takes place at both the electrode and the ultrahigh vacuum (UHV) interface Thermal activation facilitates the dissociative adsorption of formaldehyde to CO adsorbates at lower potential After the initial oxidation/stripping of CO adsorbates, which may free up some of the surface sites, partial oxidation of formaldehyde to formic acid can be observed at potentials above 200 mV