This proposal is a continuation of RB1000003. The aim of the present experiment is to gain further insight into the mechanism of benzyl alcohol oxidation using supported Au-Pd nanoparticles. Two reactions occur: oxidation to benzaldehyde and disproportionation to benzaldehyde and toluene. Very recently, we have found that Au-Pd supported on ZnO completely switches off the disporportionation reaction, thus toluene formation is prevented and allows us to study each reaction in isolation. In the previous work, we were able to observe adsorbed species but were unable to differentiate between material adsorbed on the support and that on the catalyst. In this proposal we will use an improved dosing procedure that will result in adsorbed species only being present on the metal.