Friday, November 3, 2017
Dr. Jonah Jurss
University of Mississippi
Hand 1144, 3:30 PM
Abstract: Roughly 85% of the world’s energy is derived from burning fossil fuels that generate greenhouse gases and other airborne pollutants. Carbon dioxide is the chief component of this waste stream and a leading contributor to global warming. It also represents a readily accessible C1 building block for value-added chemicals. To effectively utilize CO2, better catalysts are needed to mediate its multielectron conversion. This presentation will focus on our recent efforts in catalyst development. First, we have designed an anthracene-bridged dinuclear rhenium complex for electro- and photocatalytic CO2 reduction to CO. Related by hindered rotation of each metal site to either side of the anthracene backbone, cis and trans conformers have been isolated. Higher turnover frequencies and greater durability have been achieved relative to the parent catalyst, Re(bpy)(CO)3Cl. Second, an original series of nickel catalysts supported by bipyridyl-NHC-based ligands has been prepared for electrocatalytic CO2 conversion. Systematic modifications to the ligand framework were made to tune the flexibility and geometry of the nickel complexes. Remarkably, the structure of the catalyst, including ring size of the macrocycle, has a significant influence on the selectivity for CO2 reduction in the presence of a proton source.
Bio: Jonah Jurss obtained a B.S. degree in Chemistry from North Carolina State University and earned his Ph.D. in Chemistry from the University of North Carolina at Chapel Hill. At UNC, he studied water oxidation catalysis with ruthenium polypyridyl complexes under the direction of Prof. Thomas J. Meyer and Prof. Joseph L. Templeton. After postdoctoral research on electrocatalytic hydrogen generation with Prof. Christopher J. Chang at the University of California, Berkeley, he began his independent career at the University of Mississippi in July 2014 where his group focuses on developing and understanding new molecular catalysts for artificial photosynthesis and C-H bond functionalization.
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