Novel AuCl₃–thiourea catalyst with a low Au content and an excellent catalytic performance for acetylene hydrochlorination

Abstract

In this work, we synthesized a novel non-mercuric catalyst with HAuCl4·4H2O and thiourea as precursors, and active carbon (AC) as a support.

Ag(I) and Au(III) Mercaptobenzothiazole complexes induced apoptotic cell death

“…Figure 6 represents the XRD spectra of Ag(I)MBT and Au(III)MBT complexes. The observed XRD spectra is in satisfactory agreement with the literature 5,15–17 . In Fig.…”

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

“…Our TPR data clearly demonstrated that the onset reduction temperature for the Au 3+ species for the Au(H 2 O)/AC (OAR) catalyst was higher than for the Au(aq)/AC catalyst. The enhanced reduction temperature for the Au(H 2 O)/AC(OAR) catalyst can be attributed to the presence of sulfur atoms, which can prevent reduction of the cationic Au species [5,63]. The elemental mapping confirmed the presence of sulfur.…”

Highly Active AuCu-Based Catalysts for Acetylene Hydrochlorination Prepared Using Organic Aqua Regia

“…Pioneering work by Hutchings revealed that gold in the ionic state possesses a unique catalytic activity on the hydrochlorination reaction of acetylene [4,5,6,7,8,9,10]. Thereafter, catalysts with high efficiency in the form of Au/carbon demonstrate that the gold is feasible as a substitute for the poisonous HgCl 2 catalyst [33,34,35,36,37,38,39,40]. Despite the impressive success achieved, the easy deactivation of Au 3+ catalyst originated from its high standard electrode potential [41,42] and sintering of the catalyst [12], which largely restrains its application in industry.…”