Palladium–silver bimetallic catalysts with improved activity and selectivity for ethylene epoxidation

Dellamorte, Joseph C; Lauterbach, Jochen A.; Barteau, Mark A.

doi:10.1016/j.apcata.2010.06.023

Cited by 31 publications

(27 citation statements)

References 26 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Other interesting catalytic systems that have attained the attention of some theoretical studies include the catalytic behavior of immobilized NiO nanoparticles [124]; the epoxidation of propylene on the surface of CuO, which has been studied by Düzenli et al [125] using plane-wave DFT; the use of palladium(II) complexes in the epoxidation of olefins [126,127]; and also the epoxidation of ethylene using a bi-metallic palladium-silver catalyst [128].…”

Section: Other Epoxidation Catalysts: a Brief Overviewmentioning

confidence: 99%

Strengths, Weaknesses, Opportunities and Threats: Computational Studies of Mn- and Fe-Catalyzed Epoxidations

Teixeira

Cordeiro

2016

Catalysts

View full text Add to dashboard Cite

Abstract:The importance of epoxides as synthetic intermediates in a number of highly added-value chemicals, as well as the search for novel and more sustainable chemical processes have brought considerable attention to the catalytic activity of manganese and iron complexes towards the epoxidation of alkenes using non-toxic terminal oxidants. Particular attention has been given to Mn(salen) and Fe(porphyrin) catalysts. While the former attain remarkable enantioselectivity towards the epoxidation of cis-alkenes, the latter also serve as an important model for the behavior of cytochrome P450, thus allowing the exploration of complex biological processes. In this review, a systematic survey of the bibliographical data for the theoretical studies on Mn-and Fe-catalyzed epoxidations is presented. The most interesting patterns and trends are reported and finally analyzed using an evaluation framework similar to the SWOT (Strengths, Weaknesses, Opportunities and Threats) analysis performed in enterprise media, with the ultimate aim to provide an overview of current trends and areas for future exploration.

show abstract

Section: Other Epoxidation Catalysts: a Brief Overviewmentioning

confidence: 99%

Strengths, Weaknesses, Opportunities and Threats: Computational Studies of Mn- and Fe-Catalyzed Epoxidations

Teixeira

Cordeiro

2016

Catalysts

View full text Add to dashboard Cite

show abstract

“…In case of the doped or alloyed Ag catalysts, e.g. the Ag-Cu, Ag-Cd, Ag-Pd, Ag-Zn systems, the picture becomes even more complicated because of possible segregation of one of the components to the surface and/or bulk transformation of the material [9,[14][15][16][17]. The induction phase for almost all Ca-Ag compounds can be identified by monitoring the selectivity towards ethylene oxide.…”

Section: Duration Of the Induction Phasementioning

confidence: 99%

“…The complexity of the material increases from the single crystal of elemental Ag through polycrystalline materials towards supported and highly promoted industrially used Ag/α-Al 2 O 3 catalysts. Insertion of a second element either in the form of doping (e.g., Cu [9,[12][13][14], Pd [15]) or alloys (Zn [16], Cd [17], Au [18]) leads to the preferential segregation to the surface and formation of oxidic phases due to the different reactivity of the components and random distribution of the elements in the crystal structure. Contrary to alloys, in (ordered) intermetallic compounds (IMCs) the atoms (preferentially) occupy certain crystallographic positions and chemical interactions can be properly described in terms of local chemical bonding.…”

Section: Introductionmentioning

confidence: 99%

Ca–Ag compounds in ethylene epoxidation reaction

Antonyshyn

Sichevych

Ormeci

et al. 2019

Science and Technology of Advanced Materials

View full text Add to dashboard Cite

The ethylene epoxidation is a challenging catalytic process, and development of active and selective catalyst requires profound understanding of its chemical behaviour under reaction conditions. The systematic study on intermetallic compounds in the Ca-Ag system under ethylene epoxidation conditions clearly shows that the character of the oxidation processes on the surface originates from the atomic interactions in the pristine compound. The Ag-rich compounds Ca 2 Ag 7 and CaAg 2 undergo oxidation towards fcc Ag and a complex Ca-based support, whereas equiatomic CaAg and the Ca-rich compounds Ca 5 Ag 3 and Ca 3 Ag in bulk remain stable under harsh ethylene epoxidation conditions. For the latter presence of water vapour in the gas stream leads to noticeable corrosion. Combining the experimental results with the chemical bonding analysis and first-principles calculations, the relationships among the chemical nature of the compounds, their reactivity and catalytic performance towards epoxidation of ethylene are investigated.

show abstract

“…EO is commercially produced from the gas-phase partial oxidation of ethylene or ethylene epoxidation over Ag/low surface area (LSA) a-Al 2 O 3 catalysts with an addition of promoters [1][2][3][4][5][6].…”

Section: Introductionmentioning

confidence: 99%

Ethylene epoxidation in a low-temperature parallel plate dielectric barrier discharge system with two frosted glass plates

Chavadej

Dulyalaksananon

Suttikul

2016

Chemical Engineering and Processing - Process Intensification

View full text Add to dashboard Cite

Palladium–silver bimetallic catalysts with improved activity and selectivity for ethylene epoxidation

Cited by 31 publications

References 26 publications

Strengths, Weaknesses, Opportunities and Threats: Computational Studies of Mn- and Fe-Catalyzed Epoxidations

Strengths, Weaknesses, Opportunities and Threats: Computational Studies of Mn- and Fe-Catalyzed Epoxidations

Ca–Ag compounds in ethylene epoxidation reaction

Ethylene epoxidation in a low-temperature parallel plate dielectric barrier discharge system with two frosted glass plates

Contact Info

Product

Resources

About