CuO/ZnO/Al2O3 samples (1 and 4 Cu atoms and 1, 5, 15, and 30 Zn atoms per 100 Al atoms, respectively) have been tested as catalysts for the decomposition of 2-propanol. The samples were pretreated in a controlled way in hydrogen or in the reaction medium in order to have a known surface content of Cu(0). Below 440 K the samples showed only dehydrogenating activity. A linear relationship was found between the rate constant and the surface area of zero-valent copper. It is hence proposed that surface Cu(0) species are responsible for the dehydrogenation. The higher values of turnover frequency for the present system in comparison with the values previously found on CuO/Al2O3 enable a proposal to be made for the role of the zinc in the activity of the Cu(0) species. The beneficial effect of the zinc on the reducibility of Cu2+ ions and a reduction mechanism are also discussed. © 1992.

Pepe, F., & Polini, R. (1992). Catalytic behavior and surface chemistry of Copper/ZnO/Al2O3 catalysts for the decomposition of 2-propanol. JOURNAL OF CATALYSIS, 136(1), 86-95 [10.1016/0021-9517(92)90108-T].

Catalytic behavior and surface chemistry of Copper/ZnO/Al2O3 catalysts for the decomposition of 2-propanol

POLINI, RICCARDO
1992

Abstract

CuO/ZnO/Al2O3 samples (1 and 4 Cu atoms and 1, 5, 15, and 30 Zn atoms per 100 Al atoms, respectively) have been tested as catalysts for the decomposition of 2-propanol. The samples were pretreated in a controlled way in hydrogen or in the reaction medium in order to have a known surface content of Cu(0). Below 440 K the samples showed only dehydrogenating activity. A linear relationship was found between the rate constant and the surface area of zero-valent copper. It is hence proposed that surface Cu(0) species are responsible for the dehydrogenation. The higher values of turnover frequency for the present system in comparison with the values previously found on CuO/Al2O3 enable a proposal to be made for the role of the zinc in the activity of the Cu(0) species. The beneficial effect of the zinc on the reducibility of Cu2+ ions and a reduction mechanism are also discussed. © 1992.
Pubblicato
Rilevanza internazionale
Articolo
Sì, ma tipo non specificato
Settore CHIM/03 - Chimica Generale e Inorganica
English
Con Impact Factor ISI
TEMPERATURE-PROGRAMMED DESORPTION; X-RAY PHOTOELECTRON-SPECTROSCOPY; ZINC-OXIDE; ADSORPTION; ZNO; COPPER; CO; METHANOL; KINETICS
Pepe, F., & Polini, R. (1992). Catalytic behavior and surface chemistry of Copper/ZnO/Al2O3 catalysts for the decomposition of 2-propanol. JOURNAL OF CATALYSIS, 136(1), 86-95 [10.1016/0021-9517(92)90108-T].
Pepe, F; Polini, R
Articolo su rivista
File in questo prodotto:
Non ci sono file associati a questo prodotto.

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: http://hdl.handle.net/2108/44528
Citazioni
  • ???jsp.display-item.citation.pmc??? ND
  • Scopus ND
  • ???jsp.display-item.citation.isi??? ND
social impact