7496
J. Phys. Chem. C 2008, 112, 7496-7502
Catalytic Degradation of a Chemical Warfare Agent Simulant: Reaction Mechanisms on TiO2-Supported Au Nanoparticles Dimitar A. Panayotov† and John R. Morris* Department of Chemistry, Virginia Tech, Blacksburg, Virginia 24061 ReceiVed: December 18, 2007; In Final Form: February 25, 2008
High-vacuum transmission infrared spectroscopy is used to investigate the reaction pathways of the chemical warfare agent simulant dimethyl methylphosphonate (DMMP) on nanoparticulate Au/TiO2 and pure TiO2. The infrared spectral signature of adsorbed CO, a major reaction product, is used to track the oxidation state of Au and Ti during the reaction. We find that small,
