Tuning chemical compositions of bimetallic AuPd catalysts for selective catalytic hydrogenation of halogenated quinolines

Abstract

Au1−xPdx bimetallic catalysts with low Pd entities on CeO2 nanorods delivered high activity and chemoselectivity for hydrogenation of halogenated quinolines. Improved chemoselectivity could be attributed to the selective adsorption configurations of halogenated quinolines on Au via tilted orientation rather than on Pd via flat orientation.

Selective Semihydrogenation of Phenylacetylene to Styrene Catalyzed by Alloyed Palladium/Gold Catalysts Anchored on Cerium Oxide

“…After the reductive treatments by ascorbic acid, the color of NR ‐CeO 2 changed from yellow to dark bronzing (Figure S2a), suggesting the successfully chemical reduction of NR ‐CeO 2 , similar to our previous work . The morphology of the reduced NR ‐CeO 2 was preserved through the reductive treatments ,. Meanwhile, the apparent blue‐shift of the treated NR ‐CeO 2 in the UV‐Vis absorption spectra also indicated the increased surface Ce 3+ fraction of the treated NR ‐CeO 2 (Figure S2b), which also indicated the successful surface chemical reduction by ascorbic acid .…”

“…Influences of the Pd content in the alloyed catalysts on the hydrogenation of phenylacetylene were also studied. The characterizations of series of PdAu/ NR ‐CeO 2 catalysts could be found in our previous report . As shown in Figure S8, all alloyed PdAu catalysts delivered the higher activity compared with that of Pd or Au catalysts alone.…”

“…Meanwhile, the changed surface characteristics also lead to the modulated adsorption strength of products on the catalyst surface, which can affect the catalytic selectivity . In our previous report, the highly dispersed Pd in Au matrix leads to the formation of single Pd sites or very small Pd clusters, which can be efficient for hydrogen activation but not for the adsorption of reactants/products . Thus, herein, the adsorption of styrene on Pd(111) and Au(111) as a model system was investigated by density functional theory (DFT) calculations.…”

Recent advances in heterogeneous catalytic hydrogenation and dehydrogenation of N-heterocycles

“…Among the noble metal-based catalysts reported in the literature, Pd-based catalysts with encouraging performance in catalytic transformations are one of the most explored catalysts. Pd has a strong ability to absorb and dissociate H2 [51,52]. Benefiting from its special properties, Pd-based catalysts exhibit great potential in hydrogenation and dehydrogenation reactions [53][54][55].…”

Catalytically Active Co−Nx Species Stabilized on Nitrogen‐doped Porous Carbon for Efficient Hydrogenation and Dehydrogenation of N‐heteroarenes

“…Several heterogeneous oxidation systems including Pt/Ir NC, AuNPs/C, Cu(0)/Al 2 O 3 , and RhCNT have been employed in ODH. In addition, hydrogenation or CTH has been investigated using other heterogeneous catalysts based on Au 0.9 Pd 0.1 /CNR, Pd/HS−NH 2 , Pt NPs, and Ru/HT−C12A7 . These noble‐metal‐derived catalytic systems exhibit undesirable functional group tolerance.…”