Bimetallic Au–Ni/CSs catalysts for acetylene hydrochlorination

Gold and gold-based bimetallic catalysts for acetylene hydrochlorination were prepared with HAuCl4·4H2O and NiCl2·6H2O as precursors, and were analyzed with BET, TG, XRD, TEM, TPR, and XPS. The Au1Ni3/CSs catalyst shows both high activity and good stability, with a C2H2 conversion of 95.4% after 46 h under a gas hourly space velocity (GHSV) of C2H2 of 900 h−1. The results indicate that the addition of nickel to gold can inhibit the reduction of catalytically active Au3+ to Au0 and oxidize Au0 to Au+ during the preparation of Au-based/CSs catalysts, and weaken the occurrence of coke deposition on the catalyst surface, thus improving the stability of the catalyst.