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The University of Southampton

Plasma Electrochemistry for Electrolytic Processing Seminar

25 November 2016
Chemistry Builidng 27, Room 2001, University of Southampton, SO17 1BJ

For more information regarding this seminar, please email Nuria Garcia-Araez at .

Event details

Dr David B. Go presents a seminar as part of the electrochemistry research sections seminar series.

In the conventional picture of electrolytic processing, two metal electrodes are submerged into a electrolyte solution and an applied potential drives redox reactions at the cathode and anode,respectively. Plasma electrochemistry, also called glow discharge electrolysis, changes this convention by replacing one or both of the solid electrodes with a gas discharge. As such, reduction and oxidation reactions are no longer mediated by a solid/liquid interface but by a gaseous/liquid interface, requiring that free charges traverse from the gas to liquid and vice versa. For the past several years, we have been studying a plasma cathode configuration, where an atmospheric-pressure microhollow cathode glow discharge replaces the cathode in an electrolytic cell. In this configuration, free gaseous electrons in the plasma must be injected into the solution phase to initiate reduction reactions at the “cathode”. In this talk, I will overview our efforts at understanding and using this charge transfer process for electroylitc processing. The discussion will include using plasma electrochemistry systems for the production of nanomaterials and carbon dioxide (CO2) processing, and well as our efforts to understand electron injection from the plasma phase into the liquid phase and the ensuing electron-driven chemistry. I will cover both indirect measurements of long-lived products and more precise direct measurements of the electrons in the solution in a solvated state. In particular, I will present how the chemistry in these systems perhaps more closely reflects radiation chemistry than electrochemistry. Finally, I will discuss some new modeling results that aim to resolve some unanswered questions in this field, while perhaps raising new questions that require further study.

Speaker information

Dr David B. Go, University of Notre Dame. David B. Go is the Rooney Family Associate Professor of Engineering in the Department of Aerospace and Mechanical Engineering with a concurrent appointment in the Department of Chemical and Biomolecular Engineering at the University of Notre Dame. He has published widely in the areas of plasma science and gas discharges, heat transfer and fluid dynamics, and chemical analysis. He has authored or co-authored over 40 journal articles, over 75 conference papers and presentations, and one book chapter and also holds two patents. Prof. Go has been recognized with the Air Force Office of Scientific Research Young Investigator Research Award in 2010, the National Science Foundation CAREER award in 2013, and as an inaugural winner of the Electrochemistry Society Toyota Young Investigator Fellowship in 2015. Prior to joining Notre Dame in 2008, Prof. Go received his B.S. in mechanical engineering from the University of Notre Dame, his M.S. in aerospace engineering from the University of Cincinnati, and his Ph.D. degree in mechanical engineering from Purdue University. He is also a graduate of the Edison Engineering Development Program at G.E. Aviation (formerly G.E. Aircraft Engines), where he worked from 2001-2004.

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