Fabrication of a PdAg mesocrystal catalyst for the partial hydrogenation of acetylene

Preparation and structure-property relationships of supported trimetallic PdAuAg catalysts for the selective hydrogenation of acetylene

“…A comparison of the catalytic performance of m-PdAuAg 2 in the partial hydrogenation of acetylene with that of other catalysts reported in the literatures is also shown in Table 1. The ethene selectivity of the mPdAuAg 2 trimetallic catalyst at >99% conversion is higher than that of majority catalysts [15,16,34,36], but the value is still lower than that of the Pd-based catalyst reported by the Anderson group.…”

“…S8 in the Supplementary Material). Based on the morphological evolution, the formation of PdAuAg 2 mesocrystals is regarded as a result of homogeneous nucleation and oriented attachment [14,16]. This self-assembly occurs preferentially at the (1 0 0) facets to get the most stable state, because the surface energy of the (1 0 0) facets (c(1 0 0)) is higher than that of the (1 1 1) facets (c (1 1 1)) in the fcc crystal structure [50,51].…”

“…Our group successfully introduced the 3D nanostructures of PdAu and PdAg catalysts into the selective hydrogenation of acetylene, and these catalysts exhibited preferred activity and selectivity. The rich defect sites in the catalysts could facilitate H 2 dissociation/activation and the synergetic effect between the building blocks weakened the adsorption of C 2 H 4 species on the catalyst surfaces [15,16].…”

Hydrogenation of biomass-derived compounds containing a carbonyl group over a copper-based nanocatalyst: Insight into the origin and influence of surface oxygen vacancies

“…It is well documented that the hydrogenation of DMS usually comprises several continuous processes, including DMS hydrogenation to GBL, GBL hydrogenation to 1,4-butanediol (1,4-BDO), and deep hydrogenation to tetrahydrofuran (THF) [71]. Further, in the present CuMn-x catalyst system, external and internal mass transport effects were estimated based on Mears and Weisz-Prater criteria for the highest observed rates (shown in the Supporting Information) [72,73]. CuMn-0, 2.7 Â 10 À4 for CuMn-0.5, 5.8 Â 10 À4 for CuMn-1, and 3.9 Â 10 À4 for CuMn-1.5, respectively, indicating that the external mass transport effect over CuMn-x catalysts can be neglected.…”

Remarkably efficient CoGa catalyst with uniformly dispersed and trapped structure for ethanol and higher alcohol synthesis from syngas

“…As expected, unwanted CO 2 is under control for all the four catalysts. Mass transport and heat transfer calculations were performed for CoGa-ZnAl-LDO/c-A 2 O 3 with 43.5% CO conversion, using Weisz-Prater and Mears analyses [56,57] (see the Supplementary Information). The Weisz-Prater criterion,…”