Insights into the hydrogen evolution reaction using radiation chemistry

NUCL 35

Dan Meisel, dani@nd.edu, Radiation Laboratory and Department of Chemistry & Biochemistry, University of Notre Dame, Notre Dame, IN 46556
A student of Sully's from the early 70's and a colleague for the following thirty-five years, I am grateful for the opportunity to participate in this symposium. No doubt Sully would rather have me talk science than reminisce. Therefore, this talk, dedicated to Sully's memory, will focus on our current research. We apply surface enhanced Raman scattering to study the production of molecular hydrogen from radiolytically generated reducing radicals. Using silver nano-particles as catalysts and alcohol reducing radicals we will explore the state of the particle as it becomes catalytically active. We adsorb an informative probe on the catalytic particle; the probe reports a wealth of information on the state of the particle (and the probe) during the various stages of the process. Initially the reducing radicals reduce residual silver ions and build the negative over-potential on the particles. Then, hydrogen evolution takes over to become the dominant process. All these stages are quantitatively reflected in the scattering spectra.