MgO powders have been prepared from different precursor compounds and calcined at temperatures in the range 873-1253 K. Sequences of basic strength of the powders have been obtained, in benzene, by the Hammett-Bertolacini method, as a function of the preparation conditions, ageing and reactivating treatments. All the samples have been submitted to XPS (X-ray photoelectron spectroscopy) determinations to assess their actual chemical state. Data relative to the binding energy of the C1s and O1s peak components are elaborated and cross-compared with the outcome of the acid-base characterisations also in the light of TPD (temperature-programmed desorption) determinations. The factors affecting the surface reactivity and the localisation of the basic sites, at the different temperatures, are discussed. © 1998 Elsevier Science B.V.

MgO powders: Interplay between adsorbed species and localisation of basic sites / S. Ardizzone, C.L. Bianchi, B. Vercelli. - In: APPLIED SURFACE SCIENCE. - ISSN 0169-4332. - 126:1-2(1998), pp. 169-175.

MgO powders: Interplay between adsorbed species and localisation of basic sites

S. Ardizzone
Primo
;
C.L. Bianchi
Secondo
;
1998

Abstract

MgO powders have been prepared from different precursor compounds and calcined at temperatures in the range 873-1253 K. Sequences of basic strength of the powders have been obtained, in benzene, by the Hammett-Bertolacini method, as a function of the preparation conditions, ageing and reactivating treatments. All the samples have been submitted to XPS (X-ray photoelectron spectroscopy) determinations to assess their actual chemical state. Data relative to the binding energy of the C1s and O1s peak components are elaborated and cross-compared with the outcome of the acid-base characterisations also in the light of TPD (temperature-programmed desorption) determinations. The factors affecting the surface reactivity and the localisation of the basic sites, at the different temperatures, are discussed. © 1998 Elsevier Science B.V.
Basic character; MgO; XPS data
Settore CHIM/02 - Chimica Fisica
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/2434/185341
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