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Deactivation of Ceria Supported Palladium through C-C Scission during Transfer Hydrogenation of Phenol with Alcohols

TitleDeactivation of Ceria Supported Palladium through C-C Scission during Transfer Hydrogenation of Phenol with Alcohols
Publication TypeJournal Article
Year of Publication2016
AuthorsNelson, NC, Manzano, JS, Slowing, II
JournalJournal of Physical Chemistry C
Volume120
Pagination28067-28073
Date Published12
Type of ArticleArticle
ISBN Number1932-7447
Accession NumberWOS:000390072100035
Keywordsacid-base, chemistry, Materials Science, noble-metal catalysts, partial oxidation, polycrystalline ceria, properties, reaction-mechanism, sensitivity, situ ft-ir, structure, surface-reactions, Technology - Other Topics, temperature-programmed desorption, x-ray photoelectron
Abstract

The stability of palladium supported on ceria (Pd/CeO2) was studied during liquid flow transfer hydrogenation using primary and secondary alcohols as hydrogen donors. For primary alcohols, the ceria support was reduced to cerium hydroxy carbonate within 14 h and was a contributing factor toward catalyst deactivation. For secondary alcohols, cerium hydroxy carbonate was not observed during the same time period and the catalyst was stable upon prolonged reaction. Regeneration through oxidation/reduction does not restore initial activity likely due to irreversible catalyst restructuring. A deactivation mechanism involving C-C scission of acyl and carboxylate intermediates is proposed.

DOI10.1021/acs.jpcc.6b09828
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3D Catalysis

Alternate JournalJ. Phys. Chem. C