ChemInform Abstract: Carbon-Supported Palladium and Ruthenium Nanoparticles: Application as Catalysts in Alcohol Oxidation, Cross-Coupling and Hydrogenation Reactions

ChemInform ◽  
2014 ◽  
Vol 45 (14) ◽  
pp. no-no
Author(s):  
Eduardo J. Garcia-Suarez ◽  
Patricia Lara ◽  
Ana B. Garcia ◽  
Karine Philippot
Keyword(s):  
Cross Coupling ◽  
Alcohol Oxidation ◽  
Ruthenium Nanoparticles ◽  
Hydrogenation Reactions ◽  
Supported Palladium

scholarly journals Selectivity control in hydrogenation through adaptive catalysis using ruthenium nanoparticles on a CO2-responsive support

2021 ◽  
Author(s):  
Alexis Bordet ◽  
Sami El Sayed ◽  
Matthew Sanger ◽  
Kyle J. Boniface ◽  
Deepti Kalsi ◽  
...  
Keyword(s):  
Real Time ◽  
Carbonyl Group ◽  
Catalytic Reaction ◽  
Renewable Resources ◽  
Gas Composition ◽  
Ruthenium Nanoparticles ◽  
Catalytic Systems ◽  
Amine Functionalized ◽  
Hydrogenation Reactions ◽  
Selectivity Control

AbstractWith the advent of renewable carbon resources, multifunctional catalysts are becoming essential to hydrogenate selectively biomass-derived substrates and intermediates. However, the development of adaptive catalytic systems, that is, with reversibly adjustable reactivity, able to cope with the intermittence of renewable resources remains a challenge. Here, we report the preparation of a catalytic system designed to respond adaptively to feed gas composition in hydrogenation reactions. Ruthenium nanoparticles immobilized on amine-functionalized polymer-grafted silica act as active and stable catalysts for the hydrogenation of biomass-derived furfural acetone and related substrates. Hydrogenation of the carbonyl group is selectively switched on or off if pure H2 or a H2/CO2 mixture is used, respectively. The formation of alkylammonium formate species by the catalytic reaction of CO2 and H2 at the amine-functionalized support has been identified as the most likely molecular trigger for the selectivity switch. As this reaction is fully reversible, the catalyst performance responds almost in real time to the feed gas composition.

Preparation of Recoverable Pd Catalysts for Carbonylative Cross-Coupling and Hydrogenation Reactions

ChemCatChem ◽  
2012 ◽  
Vol 5 (1) ◽  
pp. 349-354 ◽  
Author(s):  
Jian-Rui Niu ◽  
Xing Huo ◽  
Feng-Wei Zhang ◽  
Hai-Bo Wang ◽  
Ping Zhao ◽  
...  
Keyword(s):  
Cross Coupling ◽  
Pd Catalysts ◽  
Hydrogenation Reactions

scholarly journals Polystyrene-Supported Acyclic Diaminocarbene Palladium Complexes in Sonogashira Cross-Coupling: Stability vs. Catalytic Activity

Catalysts ◽  
2018 ◽  
Vol 8 (4) ◽  
pp. 141 ◽  
Author(s):  
Vladimir Mikhaylov ◽  
Viktor Sorokoumov ◽  
Denis Liakhov ◽  
Alexander Tskhovrebov ◽  
Irina Balova
Keyword(s):  
Catalytic Activity ◽  
High Activity ◽  
Cross Coupling ◽  
Palladium Complexes ◽  
Lower Activity ◽  
Coupling Conditions ◽  
Acyclic Diaminocarbene ◽  
Supported Palladium ◽  
Polymer Supported

Two types of immobilized on the amino-functionalized polystyrene-supported acyclic diaminocarbene palladium complexes (ADC-PdII) are investigated under Sonogashira cross-coupling conditions. Depending on substituents in the diaminocarbene fragment immobilized ADC-PdII, systems are found to have different catalytic activity and stability regarding Pd-leaching. PdII-diaminocarbenes possessing protons at both nitrogen atoms smoothly decompose into Pd0-containing species providing a catalytic “cocktail system” with high activity and ability to reuse within nine runs. Polymer-supported palladium (II) complex bearing NBn–Ccarbene–NH-moiety exhibits greater stability while noticeably lower activity under Sonogashira cross-coupling. Four molecular ADC-PdII complexes are also synthesized and investigated with the aim of confirming proposed base-promoted pathway of ADC-PdII conversion through carbodiimide into an active Pd0 forms.

A quantum chemical study of hydrogen adsorption on carbon-supported palladium clusters

2019 ◽  
Vol 21 (38) ◽  
pp. 21577-21587 ◽  
Author(s):  
Lisa Warczinski ◽  
Christof Hättig
Keyword(s):  
Catalytic Hydrogenation ◽  
Quantum Chemical ◽  
Hydrogen Adsorption ◽  
Quantum Chemical Study ◽  
Chemical Study ◽  
Palladium Clusters ◽  
Hydrogenation Reactions ◽  
Supported Palladium ◽  
Insight Into

A key step for achieving better insight into catalytic hydrogenation reactions is to understand in detail the process of hydrogen adsorption on the catalyst.

Facile assembly of bifunctional, magnetically retrievable mesoporous silica for enantioselective cascade reactions

2019 ◽  
Vol 55 (90) ◽  
pp. 13578-13581 ◽  
Author(s):  
Zhongrui Zhao ◽  
Fengwei Chang ◽  
Tao Wang ◽  
Lijian Wang ◽  
Lingbo Zhao ◽  
...  
Keyword(s):  
Mesoporous Silica ◽  
Cross Coupling ◽  
Bifunctional Catalyst ◽  
Cascade Reactions ◽  
Transfer Hydrogenation ◽  
Asymmetric Transfer Hydrogenation ◽  
Aromatic Alcohols ◽  
Hydrogenation Reactions ◽  
Successive Reduction

A magnetically recyclable bifunctional catalyst enables synergistic Suzuki cross-coupling/asymmetric transfer hydrogenation and successive reduction/asymmetric transfer hydrogenation reactions for the preparation of chiral aromatic alcohols.

Sign in / Sign up

Export Citation Format

Share Document