Sub-monolayer, monolayer, and bi-layer transition metal solid acids prepared on fumed alumina

Abstract

Fumed alumina made by flame pyrolysis has very different acidity compared to conventional aluminas. Supported transition metal oxides on fumed alumina have higher stability and a greater proportion of Bronsted acid centers than the corresponding systems on conventional aluminas. Binary, supported mixed oxide monolayer and “bi-layer” structure on fumed alumina have a wide and a controllable range of acidic properties.