Metal nanoparticles supported on oxide surfaces form the basis for many industrial catalysts and promise to play an ever increasing role in future energy and environmental technologies. We have measured the adsorption energies for many late transition metals on oxide surfaces. From the dependences of these on metal coverage, we have determined the adhesion energies at the bulk metal / oxide interface. These allow one to estimate the chemical potential (μ) of the metal atoms in these particles versus particle size for oxide-supported metal supported particles and how that depends on support oxide. This chemical potential depends strongly on particle size and support, and is an important descriptor for understanding their catalytic performance, including their binding strengths to adsorbed reaction intermediates and their long-term stability against sintering. Methods for estimating metal chemical potentials in supported particles based on metal/oxide adhesion energies will be described. Trends in metal adsorption energies and metal/oxide adhesion energies will also be discussed. For example, metal/oxide adhesion energies on a given oxide support surface are found to increase with the metal elements’ oxophilicity, as estimated from the heat of formation of its most stable oxide from a gaseous metal atom plus O<sub>2</sub> gas.<br/>

Adsorption energies of metal atoms and adhesion energies of metal nanoparticles on oxide surfaces: relationships to catalyst performance

2019 Spring National Meeting

The official archive and repository for all ACS Meetings & Expositions abstracts and select posters or presentations.