γ-Al2O3 samples, both pure and Cr doped, were prepared by heating at 470 °C sol-gel precursors obtained by using aluminum tri-sec-butoxide [Al(OC4H9)3] as the starting compound. The samples were characterized for phase composition (X-ray diffraction) and surface area (BET). Electrochemical determinations of the double layer reactivity of the pure and doped oxides were performed both by surface charge and by electrokinetic sonic amplitude (ESA) determinations. The interfacial electrostatic response is discussed and analyzed also with reference to the sample surface state obtained by X-ray photoelectron spectroscopy (XPS).
Chromium doped γ-Al2O3 powders. Features of the electrical double layer and state of the surface species / S. Ardizzone, C.L. Bianchi, C. Galassi. - In: JOURNAL OF ELECTROANALYTICAL CHEMISTRY. - ISSN 1572-6657. - 490:1(2000), pp. 48-53.
|Titolo:||Chromium doped γ-Al2O3 powders. Features of the electrical double layer and state of the surface species|
ARDIZZONE, SILVIA (Primo)
BIANCHI, CLAUDIA LETIZIA MADDALENA (Secondo)
|Parole Chiave:||Alumina; Chromium; Doping (additives); Interfaces (materials); Phase composition; Powders; Sol-gels; X ray diffraction analysis; X ray photoelectron spectroscopy, Electrokinetic sonic amplitudes (ESA), Electrochemistry|
|Settore Scientifico Disciplinare:||Settore CHIM/02 - Chimica Fisica|
|Data di pubblicazione:||2000|
|Digital Object Identifier (DOI):||http://dx.doi.org/10.1016/S0022-0728(00)00213-8|
|Appare nelle tipologie:||01 - Articolo su periodico|