Characterization of CO Adsorbed to Clean and Partially Oxidized Cu(211) and Cu(111).

ABSTRACT: Copper-based catalysts gain activity through the presence of poorly coordinated Cu atoms and incomplete oxidation at the surface. The catalytic mechanisms can in principle be observed by controlled dosing of reactants to single-crystal substrates. However, the interconnected influences of surface defects, partial oxidation, and adsorbate coverage present a large matrix of conditions that have not been fully explored in the literature. We recently characterized oxygen and carbon monoxide coadsorption on Cu(111), a nominally defect-free surface, and now extend our study to the stepped surface Cu(211). Temperature-programmed desorption of CO adsorbed to bare metal surfaces confirms that two sites dominate desorption from a saturated layer: atop terrace atoms of local (111) character and atop

SUBMITTER: Zhang D 

PROVIDER: S-EPMC10749469 | biostudies-literature | 2023 Dec

REPOSITORIES: biostudies-literature