The conversion of energy-poor feedstocks like water and carbon dioxide into energy-rich fuels involves multi-electron, multi-proton transformations. In order to develop catalysts that can mediate fuel production with optimum energy efficiency, this complex proton-electron reactivity must be carefully considered. Using a combination of electrochemical methods and time-resolved spectroscopy, we have revealed new details of how molecular catalysts mediate the reduction of protons to dihydrogen and the experimental parameters that dictate catalyst kinetics and mechanism. Through these studies, we are revealing opportunities to promote, control and modulate the proton-coupled electron transfer reaction pathways of catalysts.
Jillian Dempsey is the Bowman and Gordon Gray Distinguished Term Professor in the Department of Chemistry at the University of North Carolina at Chapel Hill. Research in the Dempsey group applies the tools of physical inorganic chemistry to address challenges associated with developing efficient solar energy conversion processes. In particular, we focus on understanding the proton-coupled electron transfer reactions that underpin fuel production and elucidating electron transfer processes across materials interfaces.
Colloquium sponsored by the Department of Chemistry and Biochemistry.