Room Temperature CO Oxidation over Pt/MgFeO: A Stable Inverse Spinel Oxide Support for Preparing Highly Efficient Pt Catalyst.

MgFeO with inverse spinel structure is demonstrated to be an efficient support for constructing practical potential Pt catalyst (Pt/MgFeO). The resultant Pt/MgFeO exhibits excellent catalytic behavior in CO oxidation under normal temperature and humidity. TOF calculated based on the content of Pt is 0.131 s. The excellent performance of Pt/MgFeO attributes to the presence of surface undercoordinated lattice oxygens on MgFeO support. These oxygens could participate in the initial CO oxidation and then be recovered under O conditions. Over this Pt/MgFeO catalyst, CO catalytic oxidation should mainly follow a redox mechanism.