Enhanced Friedel-Crafts benzylation activity of bimetallic WSn-KIT-6 catalysts

Experimental and theoretical study of ZrMo-KIT-6 solid acid catalyst with abundant Brønsted acid sites

“…In addition, DBE also acts as an alkylating agent to produce the BA products. 33 As shown in Fig. 6a , KIT-6, Zr-KIT-6, and Mo-KIT-6 exhibit poor catalytic performance, and this result is ascribed to the few Brønsted acid sites in these three samples.…”

“…[26][27][28] Bimetallic KIT-6 based catalysts, such as MoZr, WZr, WNb, and WSn catalysts with tunable acidity, have been reported in recent years. [29][30][31][32][33] Xu et al studied in detail the acidity of mesoporous MoO x /ZrO 2 and WO x /ZrO 2 materials by multinuclear solid state nuclear magnetic resonance (NMR) techniques as well as density functional theory (DFT) quantum chemical calculations. 29 Bala Subramaniam and co-workers reported a series of W and Sncontaining KIT-6 solid acid catalysts and these catalysts exhibited superior catalytic performance for FC anisole benzylation.…”

“… 29 Bala Subramaniam and co-workers reported a series of W and Sn-containing KIT-6 solid acid catalysts and these catalysts exhibited superior catalytic performance for FC anisole benzylation. 33 In this work, Zr and Mo species are chosen and introduced through a one-pot method to improve the amount of acid sites. The textural properties, chemical bonds, and acidic properties of KIT-6, Zr-KIT-6, Mo-KIT-6, and ZrMo-KIT-6 are explored.…”

Hierarchical Porous WO3@SiO2 Self-Standing Monolithic Catalysts and Their Efficient Cycling “Cosolvent-Free” Friedel–Crafts Alkylation/Acylation Catalytic Properties

“…The reaction temperatures fall between 60 °C and 150 °C to obtain optimal conversion. However, full conversions are sometimes obtained at temperatures below 100 °C. ,,,, Reaction times were few hours (from 1 to 12 h) and a few minutes when reactions were activated under microwave irradiation. , Only the monoadduct products were obtained, and the selectivity was always in favor of the para-alkylated product. In order to express further the MUB-104­( x ) series’ versatility, we expended the tests toward catalyzing FC acylation.…”

Guaiacol Hydrodeoxygenation and Hydrogenation over Bimetallic Pt-M (Nb, W, Zr)/KIT-6 Catalysts with Tunable Acidity

“…To address the foregoing issues, we investigated gas-phase HDO of guaiacol over metal (Nb, W, Zr)-exchanged mesoporous materials (primarily of the KIT-6 type) as supports for impregnating Pt. We had previously shown that such metal-exchanged KIT-6 materials exhibit tunable Lewis and Brønsted acidities, depending on the type of metal and extent of metal loading. − The rationale for investigating these materials as supports is that tunable acid sites can be located in mesoporous supports to not only influence selectivity but also provide enhanced coking resistance. The Pt-based bimetallic catalysts synthesized in this manner were systematically investigated in the present work for gas-phase HDO of guaiacol.…”