The adsorption of N2O on clean and chemically modified Ru(001) surfaces

Abstract

The adsorption of N2O on clean, oxygen, deuterium and carbon monoxide modified Ru(001) surfaces was investigated. On the clean surface, three adsorption states have been observed, desorbing at 160-165, 145 and 116-123 K, respectively. On the oxygen modified surface, the presence of oxygen shifts the N2O desorption temperature from 129 K (on a clean surface) to a higher temperature of 173 K (θo = 0.12). The enhanced adsorption of N2O on partially O-covered Ru(004) was also observed. However, on D- and CO-precovered surfaces, the N2O adsorption is destabilized. These results can be accounted for by considering the "through-metal" and the lateral interactions between coadsorbates.