The hydrogenolysis reaction of aromatic alcohols (benzyl alcohol, 1-phenylethanol and diphenylmethanol), promoted by supported palladium catalysts, such as Pd/TiO2, Pd/SiO2 and Pd/Co3O4, has been investigated at 0.1 MPa H2 and 323 K. The catalysts have been characterized by BET, TPR, XRD, TEM and XPS. A different kinetic behaviour was observed: in presence of Pd/ TiO2 and Pd/SiO2 catalysts, prepared by impregnation, the hydrogenolysis activity follows the order benzyl alcohol > 1-phenylethanol ≥ diphenylmethanol, whereas it is totally reversed on Pd/Co3O4, prepared by co-precipitation. All results indicate that the reactivity of supported Pd catalysts, in the hydrogenolysis reaction, depends on the support nature, the preparation method of catalysts and the aromatic alcohols structure. Kinetic experiments carried out at different partial hydrogen pressure allow to elucidate the pathway of the C-OH bond scission, involving a radical substitution of the carbon bonded OH group by a hydrogen atom coming from the metal surface "via" associative and dissociative paths.

Aromatic Alcohols as Model Molecules for Studying Hydrogenolysis Reactions Promoted by Palladium Catalysts / Musolino, Maria Grazia; Mauriello, F; Concetta, Busacca; Pietropaolo, Rosario. - In: TOPICS IN CATALYSIS. - ISSN 1022-5528. - 58:14-17(2015), pp. 1077-1084. [10.1007/s11244-015-0476-8]

Aromatic Alcohols as Model Molecules for Studying Hydrogenolysis Reactions Promoted by Palladium Catalysts

Maria Grazia Musolino
;
Mauriello F;Rosario Pietropaolo
2015-01-01

Abstract

The hydrogenolysis reaction of aromatic alcohols (benzyl alcohol, 1-phenylethanol and diphenylmethanol), promoted by supported palladium catalysts, such as Pd/TiO2, Pd/SiO2 and Pd/Co3O4, has been investigated at 0.1 MPa H2 and 323 K. The catalysts have been characterized by BET, TPR, XRD, TEM and XPS. A different kinetic behaviour was observed: in presence of Pd/ TiO2 and Pd/SiO2 catalysts, prepared by impregnation, the hydrogenolysis activity follows the order benzyl alcohol > 1-phenylethanol ≥ diphenylmethanol, whereas it is totally reversed on Pd/Co3O4, prepared by co-precipitation. All results indicate that the reactivity of supported Pd catalysts, in the hydrogenolysis reaction, depends on the support nature, the preparation method of catalysts and the aromatic alcohols structure. Kinetic experiments carried out at different partial hydrogen pressure allow to elucidate the pathway of the C-OH bond scission, involving a radical substitution of the carbon bonded OH group by a hydrogen atom coming from the metal surface "via" associative and dissociative paths.
2015
Aromatic alcohols; Hydrogenolysis; Supported palladium catalysts
File in questo prodotto:
File Dimensione Formato  
Musolino_2015_TopicsinCatalysis_Aromatic_post-print.pdf

Open Access dal 02/09/2016

Descrizione: Vesrsione post-print
Tipologia: Documento in Post-print
Licenza: Dominio pubblico
Dimensione 325.43 kB
Formato Adobe PDF
325.43 kB Adobe PDF Visualizza/Apri
Musolino_2015_TopicsinCatalysis_Aromatic_editor.pdf

non disponibili

Descrizione: versione dell'editore - Non Open Access
Tipologia: Versione Editoriale (PDF)
Licenza: Creative commons
Dimensione 1 MB
Formato Adobe PDF
1 MB Adobe PDF   Visualizza/Apri   Richiedi una copia

I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.

Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/20.500.12318/2025
Citazioni
  • ???jsp.display-item.citation.pmc??? ND
  • Scopus 5
  • ???jsp.display-item.citation.isi??? 5
social impact