A novel fluoride-doped aluminium oxide catalyst with tunable Brønsted and Lewis acidity

Abstract

The Graphical Abstract image shows the influence of fluoride doping and temperature on the catalytic activity.

Coloured hybrid materials: exploiting an emergent surface property of fluorinated Al2O3 containing anthocyanins and betacyanins

“…These terminal bonds have been previously associated with a highly disordered structure. Actually, the F 1S XPS peak is attributed to the F ions replacing hydroxyl groups in alumina 29 which is in line with the 27 Al and 19 F NMR results as discussed above.…”

MAO- and Borate-Free Activating Supports for Group 4 Metallocene and Post-Metallocene Catalysts of α-Olefin Polymerization and Oligomerization

“…These methods consist of a fluorolytic sol–gel reaction starting from aluminum isopropoxide, followed by an activation step under the flow of a fluorinating gas. A similar method was also used for the preparation of Al 2 O 3 (F) with relatively low [F]/[Al] ratios (0.2–0.5) by the reaction of Al(OCH(Me)Et) 3 with HF in I PrOH with subsequent hydrolysis and calcination [ 212 ]. Sol–gel methods are too complex, and fluorination of γ-Al 2 O 3 seems preferable for the production of highly acidic Al-based supports.…”

Metal–Organic Framework-Derived Strategy for Improving Catalytic Performance of a Chromia-Based Catalyst in the Chlorine/Fluorine Exchange Reactions for Unsaturated Fluorocarbons

“…Nanotechnology is one of the most effective ways to improve the performance of catalysts. Kemnitz reported a fluorolytic sol–gel synthesis method which could provide nanoscaled metal fluorides (e.g., AlF 3 , BaF 2 , and MgF 2 ) with about 200–400 m 2 /g surface areas and, compared with the traditional precipitation method, the nanoscopic catalysts exhibited distinctly higher reactivity. − However, there are no fluorinated chromia catalysts reported with such a method.…”