SRPES studies of the NO2 reaction with vanadium oxide thin films on TiO2(1 1 0)-1×1

Synchrotron-radiation-induced photoelectron spectroscopy (SRPES) has been used to investigate the reaction of NO2 over vanadia thin films at different coverages on TiO2(1 1 0)-1×1. The stoichiometry and structure of the vanadia films are controlled to be VO2, rutile structured, using a previously published non-dioxygen-ambient method of synthesis in UHV. The reactivity of these VO2 films towards NO2 varies with their coverages. The results are interpreted with regard to the surface structure and stoichiometry.