Promotional effect of Pd single atoms on Au nanoparticles supported on silica for the selective hydrogenation of acetylene in excess ethylene

Recent advances in selective acetylene hydrogenation using palladium containing catalysts

“…Pei et al [65] have demonstrated that similar results can be obtained using AuPd/SiO 2 catalysts. Catalyst testing under competitive conditions demonstrated that the addition of Pd resulted in a marked increase in activity compared with monometallic Au (Fig.…”

“…Again it appears that a balance between activity and selectivity must be struck with a 40 : 1 Au : Pd ratio representing optimum performance. This catalyst composition meant that at 393 K & 85% conversion could be achieved with Reproduced from reference [65] with permission of the Royal Society of Chemistry greater than 50% selectivity to ethylene. In comparison, monometallic Au exhibits less than 5% conversion under the same conditions.…”

Selective hydrogenation of acetylene on SiO2 supported Ni-In bimetallic catalysts: Promotional effect of In

“…It is suggested that there are similar adsorption modes of acetylene and ethylene [39,40]. Here, the possible adsorption modes of acetylene on a Pd surface (some in the presence of pre-adsorbed H) are presented in Scheme 2 [41,42,43].…”

Radio-frequency H2 plasma treatment of AuPd/TiO2 catalyst for selective hydrogenation of acetylene in excess ethylene

“…And Au-250, Pd-250 and AuPd-250 were used to represent the corresponding samples conventionally reduced at 250 • C in H 2 flow for 2 h. Based on our previous studies, the supported Au catalysts reduced at 250 • C show superior catalytic performance for acetylene hydrogenation than the catalysts reduced at 400 • C [2,14]. Therefore, 250 • C was chosen as the reduction temperature of catalysts for this study.…”

“…The isolation of Pd atoms by Au mainly depends on the amount of Pd addition [10][11][12][13][14]. Pei et al [14] constructed Pd single atom alloy (SAA) on silica-supported Au nanoparticles by decreasing the loading of Pd to ppm-level and applied it to the selective hydrogenation of acetylene. The Pd in the SAA structure contributes a lot to increasing the acetylene conversion in low-temperature range, while Au plays a key role in isolating Pd atoms and preventing over hydrogenation of acetylene, therefore preserves a high selectivity of ethylene.…”