Low-temperature catalytic H2 oxidation over Au nanoparticle/TiO2 dual perimeter sites

Abstract

The catalytic reaction of H2+O2 over a Au/TiO 2 catalyst was studied by transmission IR spectroscopy and DFT calculations. A reaction path of O2-assisted H2 dissociation at the Au/TiO2 dual perimeter site was found to proceed through a Ti-OOH intermediate (see scheme). The calculated barrier range (0.13-0.25 eV) for the sequence of low-energy steps agree with the experimental Ea of 0.22 eV. © 2011 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.