Abstract
CO and CO2 chemisorption on uniform CeO2, TiO2, and Cu2O nanocrystals with various morphologies were comprehensively studied with in-situ diffuse reflectance infrared Fourier transform spectroscopy. The formed adsorbates were observed to be morphology dependent. CO or CO2 chemisorbed at the metal cation sites, and bidentate and bridged carbonates involving the O sites are sensitive to the surface composition and the local coordination environments of surface metal cations and O anions and can be correlated well with the surface structures of facets exposed on oxide nanocrystals. Carbonate and carbonite species formed by CO chemisorption can probe the different facets of CeO2. Carbonate species formed by CO chemisorption can probe the different facets of TiO2. Adsorbed CO and carbonate species formed by CO chemisorption can probe the different facets of Cu2O, and adsorbed CO2 formed by CO2 chemisorption can also probe the different facets of Cu2O. These results demonstrate chemisorption of probing molecule...
Published Version
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