Acidic and basic sites of maim group mixed metal oxides

Comparison of pH sensitivity of lithium lanthanum titanate obtained by sol?gel synthesis and solid state chemistry

“…A model involving adsorption or acid/basic sites also showed by Noller et al [14], Orlando et al [15] and Noguera et al [16] on TiO 2 and Dumont et al [17] with WO 3 should give confirmation of this non-Nernstian behavior. A surface reaction involving lithium or lanthanum with carbonates or oxicarbonate at grain boundaries is also possible.…”

X-ray photoelectron spectroscopy study of the interface between aluminum and spin-coated polyamic acid

“…This difference could be interpreted as a variation in the acid-base character of the top oxide. Indeed, according to Noller et al [13], the binding energies of cations or anions are directly related to the number of acidic and basic sites on the surface. The shift of the 01, and A'2p levels towards higher binding energies could be characteristic of a variation in surface acidity: thick alumina could have a more pronounced acid character than native alumina.…”

Preparation of magnesia-silica oxides: Effect of Mg/Si ratio and sulfate on acidity

“…Noller et al [4][5], based on spectroscopic data, observed that, when two oxides are mixed, the acid-base properties of the mixed oxide approache those of the oxide at higher concentration. This is true for chemical mixtures, as shown by Youssef et al [6][7] in the magnesia-silica system.…”