Metal Nanoparticle/Ionic Liquid/Cellulose: New Catalytically Active Membrane Materials for Hydrogenation Reactions

2009 ◽  
Vol 10 (7) ◽  
pp. 1888-1893 ◽  
Author(s):  
Marcos A. Gelesky ◽  
Carla W. Scheeren ◽  
Lucas Foppa ◽  
Flavio A. Pavan ◽  
Silvio L. P. Dias ◽  
...  
Keyword(s):  
Ionic Liquid ◽  
Metal Nanoparticle ◽  
Membrane Materials ◽  
Active Membrane ◽  
Catalytically Active ◽  
Hydrogenation Reactions

1-Butyl-3-methylimidazolium cobalt tetracarbonyl [bmim][Co(CO)4]: a catalytically active organometallic ionic liquid

2001 ◽  
pp. 1862-1863 ◽  
Author(s):  
Richard J. C. Brown ◽  
Thomas Welton ◽  
Paul J. Dyson ◽  
David J. Ellis
Keyword(s):  
Ionic Liquid ◽  
Catalytically Active

scholarly journals Optimization of transition metal nanoparticle-phosphonium ionic liquid composite catalytic systems for deep hydrogenation and hydrodeoxygenation reactions

2015 ◽  
Vol 17 (3) ◽  
pp. 1597-1604 ◽  
Author(s):  
Abhinandan Banerjee ◽  
Robert W. J. Scott
Keyword(s):  
Ionic Liquid ◽  
Ionic Liquids ◽  
Transition Metal ◽  
Metal Nanoparticles ◽  
Metal Nanoparticle ◽  
Catalytic Systems ◽  
Phosphonium Ionic Liquid

Stable metal nanoparticles in tetraalkylphosphonium ionic liquids can catalyze hydrogenations, as well as phenol hydrodeoxygenation, owing to presence of adventitious borates.

scholarly journals Tuning Water Networks via Ionic Liquid/Water Mixtures

2020 ◽  
Vol 21 (2) ◽  
pp. 403 ◽  
Author(s):  
Archana Verma ◽  
John P. Stoppelman ◽  
Jesse G. McDaniel
Keyword(s):  
Ionic Liquid ◽  
Water Content ◽  
Relaxation Times ◽  
Water Structure ◽  
Lyotropic Liquid Crystals ◽  
Rotational Relaxation ◽  
Membrane Materials ◽  
Water Fraction ◽  
Pairwise Correlation ◽  
Dynamics Simulations

Water in nanoconfinement is ubiquitous in biological systems and membrane materials, with altered properties that significantly influence the surrounding system. In this work, we show how ionic liquid (IL)/water mixtures can be tuned to create water environments that resemble nanoconfined systems. We utilize molecular dynamics simulations employing ab initio force fields to extensively characterize the water structure within five different IL/water mixtures: [BMIM + ][BF 4 − ], [BMIM + ][PF 6 − ], [BMIM + ][OTf − ], [BMIM + ][NO 3 − ] and [BMIM + ][TFSI − ] ILs at varying water fraction. We characterize water clustering, hydrogen bonding, water orientation, pairwise correlation functions and percolation networks as a function of water content and IL type. The nature of the water nanostructure is significantly tuned by changing the hydrophobicity of the IL and sensitively depends on water content. In hydrophobic ILs such as [BMIM + ][PF 6 − ], significant water clustering leads to dynamic formation of water pockets that can appear similar to those formed within reverse micelles. Furthermore, rotational relaxation times of water molecules in supersaturated hydrophobic IL/water mixtures indicate the close-connection with nanoconfined systems, as they are quantitatively similar to water relaxation in previously characterized lyotropic liquid crystals. We expect that this physical insight will lead to better design principles for incorporation of ILs into membrane materials to tune water nanostructure.

scholarly journals Supports and modified nano-particles for designing model catalysts

2016 ◽  
Vol 188 ◽  
pp. 309-321 ◽  
Author(s):  
C. P. O'Brien ◽  
K.-H. Dostert ◽  
M. Hollerer ◽  
C. Stiehler ◽  
F. Calaza ◽  
...  
Keyword(s):  
Electronic Structure ◽  
Pd Nanoparticles ◽  
Metal Nanoparticle ◽  
Model Systems ◽  
Nano Particles ◽  
Structure Changes ◽  
Hydrogenation Reactions ◽  
Composite Nature ◽  
Specific Reactions ◽  
Supported Pd

In order to design catalytic materials, we need to understand the essential causes for material properties resulting from its composite nature. In this paper we discuss two, at first sight, diverse aspects: (a) the effect of the oxide–metal interface on metal nanoparticle properties and (b) the consequences of metal particle modification after activation on the selectivity of hydrogenation reactions. However, these two aspects are intimately linked. The metal nanoparticle’s electronic structure changes at the interface as a catalyst is brought to different reaction temperatures due to morphological modifications in the metal and, as we will discuss, these changes in the chemistry lead to changes in the reaction path. As the morphology of the particle varies, facets of different orientations and sizes are exposed, which may lead to a change in the surface chemistry as well. We use two specific reactions to address these issues in some detail. To the best of our knowledge, the present paper reports the first observations of this kind for well-defined model systems. The changes in the electronic structure of Au nanoparticles due to their size and interaction with a supporting oxide are revealed as a function of temperature using CO2 activation as a probe. The presence of spectator species (oxopropyl), formed during an activation step of acrolein hydrogenation, strongly controls the selectivity of the reaction towards hydrogenation of the unsaturated CO bond vs. the CC bond on Pd(111) when compared with oxide-supported Pd nanoparticles.

scholarly journals Hydrazine‐Enabled One‐Step Synthesis of Metal Nanoparticle–Functionalized Gradient Porous Poly(ionic liquid) Membranes

2020 ◽  
pp. 2000143
Author(s):  
Atefeh KhorsandKheirabad ◽  
Xianjing Zhou ◽  
Dongjiu Xie ◽  
Hong Wang ◽  
Jiayin Yuan
Keyword(s):  
Ionic Liquid ◽  
Metal Nanoparticle ◽  
Liquid Membranes ◽  
One Step ◽  
Poly Ionic Liquid ◽  
Porous Poly

Supported Ionic Liquid Catalysis Investigated for Hydrogenation Reactions.

ChemInform ◽  
2003 ◽  
Vol 34 (13) ◽  
Author(s):  
Christian P. Mehnert ◽  
Edmund J. Mozeleski ◽  
Raymond A. Cook
Keyword(s):  
Ionic Liquid ◽  
Supported Ionic Liquid ◽  
Hydrogenation Reactions

Electropolymerisation of Catalytically Active PEDOT from an Ionic Liquid on a Flexible Carbon Cloth Using a Sandwich Cell Configuration

ChemPlusChem ◽  
2014 ◽  
Vol 80 (1) ◽  
pp. 74-82 ◽  
Author(s):  
Muhammad E. Abdelhamid ◽  
Graeme A. Snook ◽  
Anthony P. O'Mullane
Keyword(s):  
Ionic Liquid ◽  
Carbon Cloth ◽  
Cell Configuration ◽  
Catalytically Active

scholarly journals Reduced graphene oxide: firm support for catalytically active palladium nanoparticles and game changer in selective hydrogenation reactions

Nanoscale ◽  
2013 ◽  
Vol 5 (21) ◽  
pp. 10189 ◽  
Author(s):  
Manuela Cano ◽  
Ana M. Benito ◽  
Esteban P. Urriolabeitia ◽  
Raul Arenal ◽  
Wolfgang K. Maser
Keyword(s):  
Graphene Oxide ◽  
Reduced Graphene Oxide ◽  
Selective Hydrogenation ◽  
Palladium Nanoparticles ◽  
Reduced Graphene ◽  
Catalytically Active ◽  
Hydrogenation Reactions ◽  
Game Changer

Catalytically active, magnetically separable, and water-soluble FePt nanoparticles modified with cyclodextrin for aqueous hydrogenation reactions

2009 ◽  
Vol 11 (9) ◽  
pp. 1337 ◽  
Author(s):  
Kohsuke Mori ◽  
Naoki Yoshioka ◽  
Yuichi Kondo ◽  
Tetsuya Takeuchi ◽  
Hiromi Yamashita
Keyword(s):  
Water Soluble ◽  
Fept Nanoparticles ◽  
Catalytically Active ◽  
Hydrogenation Reactions ◽  
Magnetically Separable
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