469138 Single-Site Iridium Complexes on MgO Powder:  Spectroscopic, Microscopic, and Catalytic Evidence of Dependence of Properties on MgO Surface Sites

Thursday, November 17, 2016: 12:30 PM
Franciscan A (Hilton San Francisco Union Square)
Adam Hoffman, Department of Chemical Engineering, Villanova University, Villanova, PA, Louise Debefve, University of California, Davis, Davis, CA, Shengjie Zhang, University of Alabama, Tuscaloosa, AL, David A. Dixon, Department of Chemistry, University of Alabama, Tuscaloosa, AL and Bruce C. Gates, Chemical Engineering and Materials Science, University of California at Davis, Davis, CA

Supports for Metal Catalysts Are Often High-Area Metal Oxides That Present Highly Nonuniform Surface Sites for Bonding of Metals. in Attempts to Understand How Specific Support Surface Sites Bond with Metal Cations, We Investigated Single-Site Iridium on Powder MgO Treated to Control the Support Surface Sites, Including Faces and Defect Sites. the Catalysts Were Synthesized from the Precursor Ir(C2H4)2(acetylacetonate), and the MgO Treatment Conditions Were Selected to Generate Various Surface Sites for Bonding of the Iridium. X-Ray Absorption Spectra Characterizing the Supported Iridium Complexes Identify Distinct Ir–Support Surface Site Contributions on the Various MgO Supports and for Iridium Loadings in the Range of 0.1 to 1.0 Wt%. Probing of the Supported Iridium Species with CO (to form iridium

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See more of this Session: Atomically Dispersed Supported Metal Catalysts I
See more of this Group/Topical: Catalysis and Reaction Engineering Division