Pd Monolayer Catalyst—New Paradigm in Electrolytic Hydrogen Isotope Separation
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Pd Monolayer Catalyst—New Paradigm in Electrolytic Hydrogen Isotope Separation
Fri, 13/09/2024 - 11:00 to 12:00
Location:
Speaker:
Stanko Brankovic
Affiliation:
University of Houston
Synopsis:
The effect of strain in Pd monolayer catalyst is explored for electrolytic hydrogen isotopes separation. Positive/negative strain increases/decreases strength and frequency of the hydrogen adsorption bond in overpotential region. At low overpotentials, the recombination of hydrogen atoms is the rate-determining step in hydrogen evolution reaction and the positive/negative strain in Pd monolayer catalyst is expected to increase/decrease the hydrogen isotope separation factor (Sk) as compared to the bulk. To study described effects, Pd monolayer catalysts were synthesized electrochemically on Au(111) and Ru(0001) substrates each yielding qualitatively different sign and level of strain in Pd monolayers. The strength and frequency of the adsorption bond of hydrogen isotopes was studied by infrared spectroscopy (SNIFTIRS). These results served as an input for theoretical calculations of the Sk values. The calculated ratios between separation factors of Pd monolayer and Pd balk are compared to experimentally measured ones.
In the pre-face of the talk, Dr. Brankovic will introduce the audience with certain topics of the research in his group stirring discussions about potential collaborations with researchers in HWU.
GRI: iNetZ+
Biography:
Stanko R. Brankovic is a Professor at the Department of Electrical and Computer Engineering and Chemical and Biomolecular Engineering, University of Houston (2005-present). His group studies physical and chemical processes at the electrochemical interface and their use to produce materials and structures with novel functionality and application. Research activities are supported by federal (NSF, DOE, DOD), private and state grants and they evolve around areas of Sensors, Magnetic Materials, Thin Films, Electrocatalysis and Nanofabrication.
Professor Brankovic received his B.E. in Chemical and Biochemical Engineering in 1994 from the University of Belgrade and Ph.D. in Science and Engineering of Materials in 1999 from the Arizona State University. Before joining the University of Houston (2005), he spent two years as postdoctoral fellow at the Brookhaven National Laboratory (1999-2001) and four years as a research staff member at the Seagate Research Center (2001-2005).
Dr. Brankovic is the Fellow of The Electrochemical Society (2021). He has served as the Chair of the Electrodeposition Division of The Electrochemical Society (2017-2019) and as the Chair of the Material Science Division of the International Society of Electrochemistry (2015-2017). He is the recipient of the University of Houston Research and Excellence Award (2010), National Science Foundation Faculty Early Career Development Award (2010), Electrodeposition Research Award of the Electrochemical Society (2017) and the Best Fundamental Paper Award of the American Institute of Chemical Engineering (2017). More information about Dr. Brankovic’s group and research interests are available at: http://ecnfg.ece.uh.edu.
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