Supported ionic-liquid-phase-stabilized Au(iii) catalyst for acetylene hydrochlorination

Abstract

Using high-valent Au(iii) catalysis is highly desirable in many reactions; however it is plagued by the poor stability of Au(iii) complexes.

Ionic‐Liquid‐Functionalized UiO‐66 Framework: An Experimental and Theoretical Study on the Cycloaddition of CO2 and Epoxides

“…Moreover, cyclic carbonates have received extensive attention as solvents in Li-ion batteries, as monomers forp olymer synthesis, and their utility in the productiono fp olyurethanes, chemical products, and fuel additives. [28][29][30][31][32][33][34][35][36][37] In the liquid-phase reactions, leaching of the IL reduces the reactivity and stability of the material. [26,27] Over the past decades, many supported IL-phase( SILP) heterogeneousc atalysts with silicag els, SiO 2 / Al 2 O 3 ,a ctivated carbon,T iO 2 ,a nd mesoporous silica as porous support materials have been reported for various catalytic reactions.…”

“…[26,27] Over the past decades, many supported IL-phase( SILP) heterogeneousc atalysts with silicag els, SiO 2 / Al 2 O 3 ,a ctivated carbon,T iO 2 ,a nd mesoporous silica as porous support materials have been reported for various catalytic reactions. [28][29][30][31][32][33][34][35][36][37] In the liquid-phase reactions, leaching of the IL reduces the reactivity and stability of the material. Therefore, several approaches have been established for the synthesis of efficient IL-based poroush eterogeneousc atalysts.…”

Hydrochlorination of Acetylene Over the Activated‐Carbon‐Supported Au Catalysts Modified by N−P−O‐Containing Ligand

“…However, compared with the spent Au/AC, the intensity of the crystal diffraction peak of Au 0 in the catalysts is significantly reduced after the introduction of ligands, and only the discernable Au(111) lattice plane appears at 2θ of 38.5°in the spent Au 1 -HEDP 1 /AC catalyst, suggesting that the introduction of ligand may effectively retard the reduction or sintering of Au active species in the catalysts. [55,56] Moreover, the average particle size determined from the XRD patterns by the Scherrer equation decreases along the order Au/AC > Au 1 -ATMP 1 /AC > Au 1 -HEDP 1 /AC (Table S1). TEM observation provided images of the catalysts for direct assessment of the sizes of the active Au particles.…”

Alternative solvent to aqua regia to activate Au/AC catalysts for the hydrochlorination of acetylene

“…Among the numerous metal chlorides [7][8][9][10][11][12][13][14][15][16][17][18][19][20][21][22][23][24][25] and inorganic catalytic materials such as nitrogen-doped carbon [26][27][28], AC-supported g-C 3 N 4 [29], C-doped boron nitride fullerene [30], and 13X zeolite [31], AC-supported AuCl 3 catalysts are considered the most promising materials for acetylene hydrochlorination [32][33][34]. Compared with HgCl 2 for acetylene hydrochlorination, AC-supported AuCl 3 catalysts significantly improve the catalytic activity.…”