Modern Trends in Catalyst and Process Design for Alkyne Hydrogenations

Crespo‐Quesada, Micaela; Cárdenas‐Lizana, Fernando; Dessimoz, Anne-Laure; Kiwi‐Minsker, Lioubov

doi:10.1021/cs300284r

Cited by 273 publications

(227 citation statements)

References 140 publications

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“…Hence, the catalytic properties of HNPs were evaluated using semihydrogenation of phenylacetylene, which is of special importance to chemical industries [39][40][41]. We first examined the catalytic performance of these nanocatalysts (from CuS to 4/4+HNPs) using a fixed amount (5.4 μmol) of Pd x Cu y S z (x + y + z = 1; Table S1 in the ESM).…”

Section: Semihydrogenation Of Phenylacetylenementioning

confidence: 99%

Pd-dispersed CuS hetero-nanoplates for selective hydrogenation of phenylacetylene

et al. 2016

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We have exploited a new and distinctive combination method that "disperses" elemental Pd into CuS nanoplates. Pd was successfully dispersed by means of the concomitant transformation of CuS into an amorphous sulfide, which formed an intimate metal-sulfide contact via cation exchange and underwent a subsequent reduction. A series of such Pd-dispersed CuS hetero-nanoplates were synthesized with tailored proportions and compositions. By efficient utilization of noble metal atoms and stable anchored active sites, the optimal catalytic performance for the semihydrogenation of phenylacetylene, a probe reaction, was achieved with high selectivity, activity, and stability. We believe that the synthetic strategy described in our study is a feasible means of developing effective metal-sulfide catalysts for organic reactions.

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Section: Semihydrogenation Of Phenylacetylenementioning

confidence: 99%

Pd-dispersed CuS hetero-nanoplates for selective hydrogenation of phenylacetylene

et al. 2016

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“…3 The morphology (shape and size) of the active Pd nanocrystals has a great impact on their catalytic performance in alkyne hydrogenations. 4,5 When a dependence of activity, expressed as turnover frequency (TOF), with particle morphology can be established, the reaction is then referred to as structure-sensitive. Much effort has been devoted to the investigation of the structure sensitivity of acetylene hydrogenation.…”

Section: ■ Introductionmentioning

confidence: 99%

Shape-Dependence of Pd Nanocrystal Carburization during Acetylene Hydrogenation

et al. 2015

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This interdisciplinary work combines the use of shape-and size-defined Pd nanocrystals (cubes of 10 and 18 nm, and octahedra of 37 nm) with in situ techniques and DFT calculations to unravel the dynamic phenomena with respect to Pd reconstruction taking place during acetylene hydrogenation. Notably, it was found that the reacting Pd surface evolved at a different pace depending on the shape of the Pd nanocrystals, due to their specific propensity to form carbides under reaction conditions. Indeed, Pd cubes (Pd(100)) reacted with acetylene to form a PdC 0.13 phase at a rate roughly 6-fold higher than that of octahedra (Pd(111)), resulting in nanocrystals with different degrees of carburization. DFT calculations revealed changes in the electronic and geometric properties of the Pd nanocrystals imposed by the progressive addition of carbon in its lattice.

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“…Partial hydrogenation of a carbon-carbon triple bonds to double bonds is a very important synthetic reaction with high utilization both in the laboratory and on the industrial scale for the synthesis of fine and specialty chemicals [3][4] . In recent years, application and designing of highly selective catalyst for partial hydrogenation of alkynes has attracted more attention by virtue of its importance in synthesis of intermediate products [5][6][7][8][9] .…”

Section: Introductionmentioning

confidence: 99%

Synthesis of Highly Selective Nano-Structured Functionalized Sba-15 Metformin Palladium Composite Catalyst in Partial Hydrogenation of Alkynes

Kojoori

2016

J. Chil. Chem. Soc.

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In this research, a heterogeneous Nano-Structured functionalized SBA-15 metformin palladium composite catalyst is reported for the selective hydrogenation of alkynes. In the first place, A series of the heterogeneous mesoporous SBA-15 metformin palladium catalyst were prepared and afterwards the condition and the ratio of used materials were optimized to give rise a suitable high performance catalyst. The final nano-structured catalyst was characterized by X-ray powder diffraction, BET surface area, FT-IR spectrophotometer, Scanning electron microscopy (SEM) and Transmission electron microscopy (TEM) and served in partial hydrogenation of different alkynes, with high selectivity and high yield. The liquid phase hydrogenation was conducted under mild condition of room temperature and atmospheric pressure. The reactions were monitored every half an hour by gas chromatography and all of them were completed during 4-6 hours. The products were characterized by 1 H-NMR, 13 C-NMR, FT-IR, and Mass Spectrometry (MS) that strongly confirmed the (Z)-double bond configuration of produced alkenes. This prepared catalyst is competitive with the best palladium catalysts known for the selective liquid phase hydrogenation of alkynes and can be easily recovered and regenerated with keeping high activity and selectivity over multiple cycles with a simple regeneration procedure.

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Modern Trends in Catalyst and Process Design for Alkyne Hydrogenations

Cited by 273 publications

References 140 publications

Pd-dispersed CuS hetero-nanoplates for selective hydrogenation of phenylacetylene

Pd-dispersed CuS hetero-nanoplates for selective hydrogenation of phenylacetylene

Shape-Dependence of Pd Nanocrystal Carburization during Acetylene Hydrogenation

Synthesis of Highly Selective Nano-Structured Functionalized Sba-15 Metformin Palladium Composite Catalyst in Partial Hydrogenation of Alkynes

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