A series of zinc-ceria solid solution nanoparticles (ZnxCe1-xO2-y) has been synthesized via a microwave-precipitation method and the adsorption and surface reactivity properties are reported as a function of zinc content. Powdered x-ray diffraction (PXRD) of the approximately 3.0 nanometer materials shows that the lattice parameter decreases linearly with increasing zinc concentration, in agreement with Vegard’s Law, with no phase separation occurring up to 30% zinc (Zn0.3Ce0.7O2-y). BET measurements show high surface area (&gt; 200 m2/g) for the ZnxCe1-xO2-y nanoparticles, although the surface area decreases with increasing zinc composition. The activity of the series was evaluated through the catalytic oxidation of carbon monoxide to carbon dioxide, and direct correlation is made between zinc concentration and a lowering of the 50% conversion temperature over pure ceria, with the largest effects occurring at high zinc concentration. X-ray photoelectron spectroscopy (XPS) is used to probe the zinc surface concentration, as well as the local zinc and cerium chemical environments.

Adsorption and surface reactivity of ZnxCe1-xO2-y nanoparticles

251st National Meeting (2016)

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