Chemisorption and Reaction of NO and N2O on Oxidized and Reduced Ceria Surfaces Studied by Soft X-Ray Photoemission Spectroscopy and Desorption Spectroscopy

Electronic structure studies of Fe doped CeO2 thin films by resonance photoemission spectroscopy

“…3(a)] which correspond to Ce 3d spectrum from Ce (III) oxide. These spectra are fully consistent with previous reports 28 and similar to those observed in our previous studies on undoped CeO 2 thin films. 20 The relative concentration of Ce 4þ and Ce 3þ present in the films was determined by calculating the area under the resolved peaks and was found to be 0.65 and 0.35, respectively.…”

Adsorption and reaction of methanol on thin-film cerium oxide

“…The primary desorption products were CO and H 2 that desorbed near 580 K with smaller amounts of H 2 O, CH 2 O, CH 3 OH and CO 2 desorbing at a similar temperature. Ferrizz et al studied CH 3 zirconia (YSZ) and ceria films on Al 2 O 3 (0 0 0 1) [14]. Only a small amount of methanol reacted with the fully oxidized CeO 2 (1 1 1) surface and this produced formaldehyde at 680 K. More methanol adsorbed on a sputtered CeO 2 (1 1 1) surface however the reaction products and desorption temperatures were unchanged.…”

“…It has generally been observed that in a UHV environment, most adsorbates require oxygen vacancies on the ceria surface in order to adsorb and therefore most gases do not strongly interact with the fully oxidized surface [2][3][4][5][6]. We are investigating a series of molecules in which a reactive atom, such as O or S, may provide a means for a molecule to attach to the surface.…”

Preparation and Characterization of Nanoporous Ceria Containing Heteroatoms, With and Without a Matrix

“…Ceria or metal supported on ceria have been found to catalyse such diverse reactions as methanol oxidation to CO and H 2 (Shen and Matsumura, 2000) CO oxidation to * To whom correspondence should be addressed. CO 2 (Overbury et al, 1999), and reduction of NO and N 2 O to N 2 (Putna et al, 1998). In addition, several reports have appeared on the catalytic activity of mixed metal-cerium oxides.…”