A study on structural features of bimetallic Pd-M/C (M: Zn, Ga, Ag) catalysts for liquid-phase selective hydrogenation of acetylene

Глыздова, Д. В.; Vedyagin, Aleksey A.; Tsapina, Anna M.; Каичев, В. В.; Trigub, Alexander L.; Тренихин, М. В.; Shlyapin, D. A.; Цырульников, П. Г.; Лавренов, А. В.

doi:10.1016/j.apcata.2018.06.029

Cited by 46 publications

(24 citation statements)

References 68 publications

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“…The Pd peak shifting provided further evidence of the iron series element modification on Pd. The modification may suppress the formation of β‐Pd hydride and affect the selectivity ,,,. And the high resolution XPS spectra of Fe 2p, Co 2p and Ni 2p were also obtained, shown in Figure S3 ,.…”

Section: Resultssupporting

confidence: 90%

“…The selectivity decreased rapidly as more styrene converted to ethylbenzene in a short reaction time. Because the opportunity of styrene exposed to Pd active sites was high . In contrast, for Pd−Ni(1 : 2)/NC with more “dilution” of Pd active sites, although the selectivity of styrene could be sustained for a long time, the conversion of phenylacetylene was not very high.…”

Section: Resultsmentioning

confidence: 98%

“…The peak shifting indicated that some Pd−M alloys were generated as the iron metal atoms M (Fe, Co or Ni) may embedded into the Pd lattice . The existence of some Pd−M alloys may lead a dilution of Pd, which may develop advantageous effects for the semihydrogenation of phenylacetylene ,. No diffraction peaks due to M (Fe, Co or Ni) species were detected from the patterns, which indicated that the M species were amorphous ,.…”

Section: Resultsmentioning

confidence: 99%

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Promoting Role of Iron Series Elements Modification on Palladium/Nitrogen Doped Carbon for the Semihydrogenation of Phenylacetylene

Zhang

Long

et al. 2019

ChemCatChem

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In this work, an effective and versatile modification approach of palladium (Pd)/nitrogen doped carbon by iron series element for the semihydrogenation of phenylacetylene is presented. Pd and iron series element M (M = Fe, Co or Ni) particles were coreduced and supported on nitrogen-doped activated carbon (PdÀ M/NC). Experimental results showed that the PdÀ M/NC exhibited relatively good catalytic performance when the Pd/M content mass ratio was approximately 1 : 1. The selectivity of styrene could be maintained at relatively good levels even with the prolongation of reaction time. The good catalytic effect of the PdÀ M/NC may be attributed to the incorporation of iron series element species. The catalysts had been characterized in detail and contrastive study was made to validate the modification effect. The catalyst could maintain its catalytic activity and selectivity in the recycle process. This work may show industrial application potentiality and developing directions in selective hydrogenation process. acetylene (99 %) and other chemicals were purchased from Tianjin Rionlon reagent Co., Ltd. All reagents were used as received. 2 3 4 5 6 7 8

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Section: Resultssupporting

confidence: 90%

Section: Resultsmentioning

confidence: 98%

Section: Resultsmentioning

confidence: 99%

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Promoting Role of Iron Series Elements Modification on Palladium/Nitrogen Doped Carbon for the Semihydrogenation of Phenylacetylene

Zhang

Long

et al. 2019

ChemCatChem

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“…The contiguous Pd ensemble sites are widely indicated as one of the dominant factors for the poor selectivity and stability due to the favored overhydrogenation and oligomerization processes. , Isolating the contiguous active sites to suppress the presence of detrimental ensemble sites, normally known as the active-site isolation strategy, can effectively alleviate the overhydrogenation of alkynes to alkanes. ,,, The basic principle of such a site isolation strategy is to inhibit the di/multi-σ bond adsorption configurations for molecular species. Introducing another metal that is inert for hydrogenation, such as Cu, Ag, Zn, Ga, , and In, to alloy with active metal such as Pd and Ni is widely employed to achieve the isolation of Pd/Ni ensemble sites, which has been experimentally proved to be effective for improving the selectivity to target product in alkyne/alkadienes hydrogenation. Among the alloy structures, intermetallic compounds featured with well-ordered atomic arrangements can endow homogeneous sites-isolation and thus render the possibility of manipulating the structures of active sites toward excellent catalytic performances at the atomic level. − These unique structures are also easy model by theoretical calculations for understanding the structure–performance relations.…”

Section: Atomic-level Regulation For Active Sitesmentioning

confidence: 99%

Mechanistic and Atomic-Level Insights into Semihydrogenation Catalysis to Light Olefins

Yan

Cao

et al. 2022

ACS Catal.

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Semihydrogenations of alkynes and alkadienes to light olefins catalyzed by a heterogeneous catalyst are widely applied in the chemical industry, but it remains challenging to design high-performance catalysts for these processes. The well-developed synthesis methodologies, characterization techniques for catalyst structures, and theoretical calculations in recent decades render opportunities for understanding mechanisms and elaborating the structures of active sites at the atomic level. This Review summarizes recent advances in the mechanistic and atomic-level insights into semihydrogenation catalysis for alkynes and alkadienes to light olefins. The structure-sensitivity, information on active sites, and reaction kinetics are initially discussed to demonstrate the knowledge on the mechanistic and kinetics details of the hydrogenations of alkynes and alkadienes. We then introduce the regulations for the active sites, especially at the atomic level, based on three categories, i.e., site-isolation, local environment regulation, and oxygen vacancy and interfacial sites. Followed by the discussion on the conventional thermocatalytic hydrogenations, the emerging photocatalytic and electrocatalytic semihydrogenations of alkynes and alkadienes are further covered. Finally, we provide a brief overview on the current status of this field and a perspective for future study on the atomic-level design and regulation of catalysts for controlling the selectivity to target products.

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“…In addition, it has been suggested that incorporation of Ga modifies the chemical state of Pd species for selective hydrogenation of acetylene and CO 2. These results indicate that Pd‐Ga bimetallic catalysts may be a potential candidate for EAQ hydrogenation. However, a detailed research related to Ga promoted Pd‐based catalysts for EAQ hydrogenation has not been reported.…”

Section: Introductionmentioning

confidence: 99%

Enhanced catalytic performance of Pd‐Ga bimetallic catalysts for 2‐ethylanthraquinone hydrogenation

Wang

Mao

et al. 2019

Applied Organom Chemis

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A series of Pd and Pd‐Ga bimetallic catalysts were prepared by a co‐impregnation method for 2‐ethylanthraquinone (EAQ) hydrogenation to produce hydrogen peroxide. Compared with 0.6Pd catalyst, the hydrogenation efficiency of 0.6Pd1.2Ga catalyst (11.9 g L−1) increases by 32.2%, and the stability of 0.6Pd1.2Ga catalyst is also higher than that of 0.6Pd catalyst. The structures of the samples were determined by N2 adsorption–desorption, ICP, XRD, CO chemisorption, TEM, H2‐TPR, in situ CO‐DRIFTS and XPS. The results suggest that incorporation of Ga species improves Pd dispersion and generates a strong interaction between Ga2O3 and Pd interface or between Pd and support. DFT calculation results indicate that the strong adsorption of carbonyl group on Ga2O3/Pd interface facilitates the activation of EAQ and promotes the hydrogenation efficiency.

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A study on structural features of bimetallic Pd-M/C (M: Zn, Ga, Ag) catalysts for liquid-phase selective hydrogenation of acetylene

Cited by 46 publications

References 68 publications

Promoting Role of Iron Series Elements Modification on Palladium/Nitrogen Doped Carbon for the Semihydrogenation of Phenylacetylene

Promoting Role of Iron Series Elements Modification on Palladium/Nitrogen Doped Carbon for the Semihydrogenation of Phenylacetylene

Mechanistic and Atomic-Level Insights into Semihydrogenation Catalysis to Light Olefins

Enhanced catalytic performance of Pd‐Ga bimetallic catalysts for 2‐ethylanthraquinone hydrogenation

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