| AVS 59th Annual International Symposium and Exhibition | |
| Surface Science | Monday Sessions |
| Session SS-MoM |
| Session: | Nonequillibrium and Nonlinear Processes |
| Presenter: | D. Diesing, University of Duisburg-Essen, Germany |
| Authors: | D. Bürstel, University of Duisburg-Essen, Germany M. Scheele, University of Duisburg-Essen, Germany I. Nedrygailov, University of Duisburg-Essen, Germany D. Diesing, University of Duisburg-Essen, Germany |
| Correspondent: | Click to Email |
The hydrogen evolution reaction is one of the key reactions in catalysis whereby protons from a liquid phase discharge at a metal surface and form atomic hydrogen. A correlation between the reaction rate and the chemisorption energy of the metal-hydrid species (so called Volcano plot) was motivated for decades by an exponentially increasing reaction rate originated from a stronger chemisorption energy by arguments from the equilibrium thermochemistry. Progress in the study of metal-gas phase interactions points to electronically excited states, when atoms adsorb on a metal or chemical reactions with molecules occur. Up to now metal-liquid interfaces are not in the focus of research activities considering non equilibrium processes in the course of interfacial chemical reactions. We show experimental concepts how reactions on metal-liquid interfaces can be reviewed with respect to the existence of chemically induced electronic excitations. In a theoretical model we show that even small deviations from the electronic equilibrium may change the rate of the discharge reaction of protons on metal surfaces.