Metal-support bonds in supported metal catalysts.

摘要

This research project, now in its third year, is an investigation of the synthesis, structure, and bonding of a family of metal complexes, clusters, and particles on the surfaces of high-area metal oxide supports. The focus is the structure of the metal-support interface. Surface species have been prepared by synthetic organometallic chemistry on the support surfaces. The organometallic precursors are complexes of W, Re, Os, Ir, and Pt, including W(CO)(sub 6), HRe(CO)(sub 5), Re(sub 2)(CO)(sub 10), H(sub 3)Re(sub 3)(CO)(sub 12), H(sub 2)Os(CO)(sub 4), Ir((eta)(sup 3)-C(sub 3)H(sub 5))(sub 3), and Pt((eta)(sup 3)-C(sub 3)H(sub 5))(sub 2). The supports are primarily MgO and (gamma)-Al(sub 2)O(sub 3). The surface species have been characterized by infrared and EXAFS spectroscopies, among other techniques. 7 refs., 5 figs., 4 tabs.