Topic: Generation of Structurally Defined Sites on Surfaces: Towards Tailored Heterogeneous Catalysts
Speaker: Professor Matthew Conley - University of California at Riverside
Host: Professor Mitch Smith
Date: Monday, November 4, 2019
Time: 11:20 AM
Location: 136 CEM
Nearly all large-scale catalytic reactions in chemical industry use a heterogeneous catalyst. These critically important materials usually contain a high surface area inert support (SiO2, Al2O3, etc.), and a catalytically active site dispersed on the support. The structure of an active site in a heterogeneous catalysts can be extremely difficult to determine using spectroscopic techniques because available synthetic methods produce complex mixtures of active and dormant sites on a support surface. This limitation results in empirical optimization strategies, and also, and reactions that are less energy efficient than those catalyzed by related homogeneous catalysts. This seminar will describe our efforts to generate well-defined active site structures on oxide surfaces. Well-defined active sites for the polymerization of olefins, and generation of very strong Lewis/Bronsted acid sites on surfaces will be discussed, with a particular emphasis on spectroscopic characterization of reactive intermediates.