In:
Angewandte Chemie, Wiley, Vol. 131, No. 41 ( 2019-10-07), p. 14828-14835
Abstract:
The interaction of hydrogen with reduced ceria (CeO 2− x ) powders and CeO 2− x (111) thin films was studied using several characterization techniques including TEM, XRD, LEED, XPS, RPES, EELS, ESR, and TDS. The results clearly indicate that both in reduced ceria powders as well as in reduced single crystal ceria films hydrogen may form hydroxyls at the surface and hydride species below the surface. The formation of hydrides is clearly linked to the presence of oxygen vacancies and is accompanied by the transfer of an electron from a Ce 3+ species to hydrogen, which results in the formation of Ce 4+ , and thus in oxidation of ceria.
Type of Medium:
Online Resource
ISSN:
0044-8249
,
1521-3757
DOI:
10.1002/ange.v131.41
DOI:
10.1002/ange.201907117
Language:
English
Publisher:
Wiley
Publication Date:
2019
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