Performance and characterization of a [PtMo6]/MgO catalyst: The catalytic activity for NO-CO reactions and structural analysis by EXAFS

Article abstract of DOI:10.1246/bcsj.70.1607

The catalytic property of a [PtMo₆]/MgO catalyst prepared by using a [PtMo₆O₂₄]^8- precursor for NO-CO reactions and a structural analysis by means of Pt L₃- and Mo K-edge EXAFS spectroscopy was studied. The catalytic activity of the bimetallic ensemble catalyst appeared due to the incorporation of Pt ions into the MgO surface, where Pt⁴⁺ ions substituted Mg²⁺ ions in the first layer of the MgO surface. It seems that the NO-CO reaction proceeded on the Pt sites embedded in the MgO surface by a redox mechanism, whereas metallic Pt particles on MgO were inactive under the present reaction conditions, characterized by an in-situ EXAFS analysis.