Diphenylacetylene hydrogenation on a PdAg /Al 2 O 3 single-atom catalyst: an experimental and DFT study

Рассолов, А. В.; Криворученко, Д. С.; Medvedev, Michael G.; Mashkovsky, Igor S.; Stakheev, A. Yu.; Svitanko, Igor V.

doi:10.1016/j.mencom.2017.11.026

Cited by 17 publications

(5 citation statements)

References 28 publications

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“…Originally, two metal components are linked together within initial complex structure by strong acetate bridges, thus ensuring intimate bonding of both metals during metal loading and providing uniform stoichiometry of IMC nanoparticles in a final catalyst. This approach was successfully applied earlier [ 29 , 30 , 31 , 32 ] for preparation of PdCu and PdAg supported catalysts. PdIn samples were also investigated in our group, however, the formation of PdIn IMC has not been studied in detail and the optimal conditions for the PdIn IMCs formation remain unclear.…”

Section: Introductionmentioning

confidence: 99%

Highly-Ordered PdIn Intermetallic Nanostructures Obtained from Heterobimetallic Acetate Complex: Formation and Catalytic Properties in Diphenylacetylene Hydrogenation

et al. 2018

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Formation of PdIn intermetallic nanoparticles supported on α-Al2O3 was investigated by X-ray powder diffraction (XRD), transmission electron microscopy (TEM), and hydrogen temperature-programmed desorption (H2-TPD) methods. The metals were loaded as heterobimetallic Pd(μ-O2CMe)4In(O2CMe) complex to ensure intimate contact between Pd and In. Reduction in H2 at 200 °C resulted in Pd-rich PdIn alloy as evidenced by XRD and the disappearance of Pd hydride. A minor amount of Pd1In1 intermetallic phase appeared after reduction at 200 °C and its formation was accomplished at 400 °C. Neither monometallic Pd or in nor other intermetallic structures were found after reduction at 400–600 °C. Catalytic performance of Pd1In1/α-Al2O3 was studied in the selective liquid-phase diphenylacetylene (DPA) hydrogenation. It was found that the reaction rate of undesired alkene hydrogenation is strongly reduced on Pd1In1 nanoparticles enabling effective kinetic control of the hydrogenation, and the catalyst demonstrated excellent selectivity to alkene.

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Section: Introductionmentioning

confidence: 99%

Highly-Ordered PdIn Intermetallic Nanostructures Obtained from Heterobimetallic Acetate Complex: Formation and Catalytic Properties in Diphenylacetylene Hydrogenation

et al. 2018

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“…By optimizing the amount of Pd on the surface of SAA, the hydrogenation performance of Pd was maximized. Similarly, dispersion of Pd in Ni, Cu, Ag lattice in the forms of SAA also exhibits the same effect. − When the content of the active metal on the surface is further increased to form a partially coated or monolayer coated core@shell structure, the utilization of the active metal could still be maintained at a high level. Xiong et al partially dispersed Pt on the surface of PdFe alloy, and the catalyst realized 14 times mass activity in ORR compared with Pt/C, suggesting the remarkable enhanced utilization of Pt.…”

Section: How To Maximize the Active Sites’ Number?mentioning

confidence: 80%

Recent Progress on Rational Design of Bimetallic Pd Based Catalysts and Their Advanced Catalysis

et al. 2020

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Bimetallic Pd based catalysts have received tremendous research interests for many important reactions in fields of important petrochemical industrial process, fine chemical synthesis, environment protection, renewable energy conversion, as their specific activity and selectivity are usually higher than that of pure Pd. With a well-defined composition, Pd–M bimetallic catalysts are also the ideal platform for the investigation of the reaction mechanism, which provides a bridge for the construction of high-performance catalyst. This Review intends to give an overview of the recent advances on the design principles of bimetallic Pd based catalyst in term of active sites’ structure and number, and provide insights into the synergy effects between Pd and M as well as the supports to understand the elementary mechanisms of reactions. The Review starts with how the intrinsic activity and selectivity of different structures (alloy, core–shell, and Pd/metal compound interface) would be controlled by ligand effect, strain effect, ensemble effect, and support effect; followed by a discussion of the structure determined mechanism investigation in reactions of selective hydrogenation, CO oxidation, methane combustion, electrocatalytic energy conversion (HER, ORR, MOR), CO2 reduction, H2 production, biomass upgrading, and fine chemical synthesis; and then introduces the strategies for how to maximize the active sites’ number in a finite metal load. Finally, the operando insight into the active sites’ reconstruction under reaction condition will be discussed. On the basis of this Review, the experience and generic rules acquired from the design thoughts, synthetic disciplines, and the functionalities of bimetallic Pd based catalysts in a given reaction could have an important referential significance for revealing catalytic mechanisms at the molecular scales as well as building up other high-efficiency bimetallic catalysts.

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“…DPA hydrogenation involves the semi‐hydrogenation to cis ‐stilbene (CST) or trans ‐stilbene (TST) and their hydrogen‐mediated isomerization. Derivatives of CST and TST are used as dyes, liquid crystals, optical brighteners, OLEDs, or in the production of food additives 61. However, the selective hydrogenation of substituted carbon‐carbon triple bonds may be challenging, as adsorption heats of reactants and intermediates are often similar.…”

Section: Resultsmentioning

confidence: 99%

Pd/Ag Nanoparticles Prepared in Ionic Liquids as Model Catalysts for the Hydrogenation of Diphenylacetylene

Uzunidis

Behrens

2022

Chemie Ingenieur Technik

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The preparation of bimetallic Pd/Ag-based model catalysts is addressed to study the promotional effects of Ag doping in the liquid-phase semi-hydrogenation of diphenylacetylene. The precursor concept is employed where colloidal bimetallic Pd/Ag nanoparticles are initially synthesized and then used as well-defined building units for catalyst preparation. This approach allows for tuning the composition of the nanoparticles independently with the two metals co-localized to a fine extent. Size and composition of the nanoparticles are preserved after immobilizing them on a carbon support.

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Diphenylacetylene hydrogenation on a PdAg /Al 2 O 3 single-atom catalyst: an experimental and DFT study

Cited by 17 publications

References 28 publications

Highly-Ordered PdIn Intermetallic Nanostructures Obtained from Heterobimetallic Acetate Complex: Formation and Catalytic Properties in Diphenylacetylene Hydrogenation

Highly-Ordered PdIn Intermetallic Nanostructures Obtained from Heterobimetallic Acetate Complex: Formation and Catalytic Properties in Diphenylacetylene Hydrogenation

Recent Progress on Rational Design of Bimetallic Pd Based Catalysts and Their Advanced Catalysis

Pd/Ag Nanoparticles Prepared in Ionic Liquids as Model Catalysts for the Hydrogenation of Diphenylacetylene

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