Investigation of the strong metal support interaction state of Ru/TiO2 by 1H nuclear magnetic resonance

Abstract The anomalous chemisorption properties and modified catalytic performance exhibited by many metal/oxide combinations following a high temperature reduction has been called the strong metal support interaction (SMSI) state. Whilst the effect of this state on catalyst properties has long been recognised the mechanism of SMSI has remained controversial. The proposal that the SMSI effect in Ru/Titania is due to a migration of the partially reduced oxide over the metal surface is strongly supported by the 1 H NMR experiments presented here.