Understanding Surface Properties in CeO₂ Catalysts for the Synthesis of Dimethyl Carbonate: A Combined In Situ IR and NEXAFS Study.

ABSTRACT: In this work, we studied the surface properties of two different CeO₂ catalysts, one synthesized by a modified hydrothermal method and the other obtained by a nonconventional calcination of a metal-organic framework (MOF). The first one presented a high surface area (CeO₂-HSA) with accessible Ce sites located primarily on (111) planes, while the MOF-derived material (CeO₂-MOF) showed coordinatively unsaturated Ce sites (CUS) located on (110) planes. In situ IR and NEXAFS spectroscopies were employed to unravel the nature of the surface intermediates and the Ce oxidation state during the reaction. Both materials show Ce reduction during the adsorption of methanol as a consequence of methoxide-to-formate decomposition, while CeO₂-HSA produce

SUBMITTER: Galliano G 

PROVIDER: S-EPMC12599007 | biostudies-literature | 2025 Nov

REPOSITORIES: biostudies-literature