Effect of the TiO<sub>2</sub> Reduction State on the
Catalytic CO Oxidation on Deposited Size-Selected Pt Clusters
Simon Bonanni
Kamel Aït-Mansour
Wolfgang Harbich
Harald Brune
10.1021/ja2098854.s001
https://acs.figshare.com/articles/journal_contribution/Effect_of_the_TiO_sub_2_sub_Reduction_State_on_the_Catalytic_CO_Oxidation_on_Deposited_Size_Selected_Pt_Clusters/2547679
The catalytic activity of deposited Pt<sub>7</sub> clusters
has
been studied as a function of the reduction state of the TiO<sub>2</sub>(110)-(1 × 1) support for the CO oxidation reaction. While a
slightly reduced support gives rise to a high catalytic activity of
the adparticles, a strongly reduced one quenches the CO oxidation.
This quenching is due to thermally activated diffusion of Ti<sup>3+</sup> interstitials from the bulk to the surface where they deplete the
oxygen adsorbed onto the clusters by the formation of TiO<sub><i>x</i></sub> (<i>x</i> ≃ 2) structures. This
reaction is more rapid than the CO oxidation. The present results
are of general relevance to heterogeneous catalysis on TiO<sub>2</sub>-supported metal clusters and for reactions involving oxygen as intermediate.
2012-02-22 00:00:00
CO oxidation reaction
Pt 7 clusters
TiO 2 Reduction State
Catalytic CO Oxidation
CO oxidation