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Lioubov Kiwi

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Publications associées (131)

Carbon supported gold and silver: Application in the gas phase hydrogenation of m-dinitrobenzene

Lioubov Kiwi, Fernando Cardenas Lizana

We have studied the gas phase continuous hydrogenation of m-dinitrobenzene (m-DNB) over acid treated activated carbon (AC) supported Au and Ag prepared by deposition-precipitation. Temperature programmed reduction of a 1%wt. metal loading generated a broad ...

Elsevier Science Bv2015

Increasing Pt selectivity to vinylaniline by alloying with Zn via reactive metal-support interaction

Lioubov Kiwi, Charline Berguerand, Artur Yarulin

The promoting effect of Zn on Pt-based catalyst was studied for the liquid-phase hydrogenation of 3-nitrostyrene (3-NS). The monodispersed Pt nanoparticles (ca. 2.3 nm) supported on ZnO catalyzed the target 3-vinylaniline (3-VA) formation (S3-VA = 97% at X ...

Elsevier2015

Preparation and Characterization of High-Surface-Area Bi(1-x)/3V1-xMoxO4 Catalysts

Lioubov Kiwi, Alexandre Nell

We report the successful application of a templating approach employing ordered mesoporous carbon to the synthesis of BiVO4, Bi2Mo3O12, and Bi0.85V0.55Mo0.45O4 and the performance of these materials as catalysts for the oxidation of propene to acrolein. Or ...

American Chemical Society2014

Impact of organic-ligand shell on catalytic performance of colloidal Pd nanoparticles for alkyne gas-phase hydrogenation

Lioubov Kiwi, Fernando Cardenas Lizana, Daniel André Samuel Lamey, Irina Prokopyeva

Monodispersed Pd nanoparticles (NPs) have been prepared by colloidal technique and deposited on a structured support consisting of carbon nanofibers (CNF) grown on sintered metal fibres (SMF). The surface properties of Pd NPs have been fine-tuned by (i) ch ...

Elsevier2014

Highly Selective Catalytic Reduction of Nitro- to Azoarenes under Ambient Conditions

Lioubov Kiwi, Carlos Gilberto Morales Guio

Catalytic system of Au nanoparticles supported on metal oxides has been developed to produce azoarenes in one-step directly from nitroarenes under mild conditions (30 °C, 1 bar of N2) using 2-propanol as solvent and reducing agent. Close to 100 % chemosele ...

Springer/Plenum Publishers2014

Size and Shape-controlled Pd Nanocrystals on ZnO and SiO2: When the Nature of the Support Determines the Active Phase

Lioubov Kiwi, Rocio Micaela Crespo Quesada

The structure sensitivity of acetylene hydrogenation was studied over size-controlled cubic and octahedral Pd nanocrystals (NCs) supported on ZnO and SiO2. Acetylene hydrogenation was found to be structure sensitive [with Pd(111) in octahedra being more ac ...

Wiley-VCH Verlag2014

Life Cycle Analysis within Pharmaceutical Process Optimization and Intensification: Case Study of Active Pharmaceutical Ingredient Production

Lioubov Kiwi, Charline Berguerand

As the demand for new drugs is rising, the pharmaceutical industry faces the quest of shortening development time, and thus, reducing the time to market. Environmental aspects typically still play a minor role within the early phase of process development. ...

Wiley-VCH Verlag Berlin2014

Structure Sensitivity of 2-Methyl-3-butyn-2-ol Hydrogenation on Pd: Computational and Experimental Modeling

Lioubov Kiwi, Rocio Micaela Crespo Quesada

In the frame of DFT paradigms, the adsorption of 2-methyl-3-butyn-2-ol (MBY) and 2-methyl-3-buten-2-ol (MBE) on a Pd-30 cluster, including both {100} and {111} faces, was studied along with the pathways involved in the hydrogenation, taking place on plane ...

American Chemical Society2014

Selective hydrogenation of 2-methyl-3-butyn-2-ol over Pd-nanoparticles stabilized in hypercrosslinked polystyrene: Solvent effect

Lioubov Kiwi

Selective hydrogenation of 2-methyl-3-butyn-2-ol (MBY) to 2-methyl-3-butene-2-ol (MBE) over Pd supported on hypercrosslinked polystyrene was studied in polar (ethanol, isopropanol, water) and non-polar (cyclohexane, toluene, octane, hexane, heptane and m-x ...

Elsevier2014

An examination of catalyst deactivation in p-chloronitrobenzene hydrogenation over supported gold

Lioubov Kiwi, Fernando Cardenas Lizana, Daniel André Samuel Lamey, Xiaodong Wang

The stability of Au/Al2O3 in the continuous gas phase (423 K) hydrogenation of p-chloronitrobenzene (p-CNB) to p-chloroaniline (p-CAN) has been investigated over an inlet H-2/p-CNB = 4-390, i.e. from close to stoichiometry to H2 far in excess. The catalyst ...

Elsevier2014

The use of Pd catalysts on carbon-based structured materials for the catalytic hydrogenation of bromates in different types of water

Lioubov Kiwi

The aim of this work is to study the activity of new Pd catalysts, supported on two different nano structured carbon materials, for bromate catalytic hydrogenation. The influence of the support has been studied, obtaining the best results with a palladium ...

Elsevier2014

Innovative transparent non-scattering TiO2 bactericide thin films inducing increased E. coli cell wall fluidity

Juan Kiwi, Lioubov Kiwi, Andrzej Kulik, César Pulgarin, Rosendo Sanjines, Sami Rtimi, Mariusz Andrzejczuk

This study presents the first account for transparent, non-scattering TiO2 films on radio-frequency (RF) plasma and ultraviolet light in the C-spectral region (UVC) pretreated polyethylene (PE). These pretreatments allow the PE to bind higher amounts of Ti ...

Elsevier Science Sa2014

Intensification of slow reversible chemical transformation: carboxylation of resorcinol as a case study

Lioubov Kiwi, Anne-Laure Dessimoz, Charline Berguerand

Conjugated kinetic and thermodynamic modeling is suggested as a suitable approach to identify a novel process window (NPW) for the intensification of slow reversible reactions. The aqueous Kolbe-Schmitt synthesis of beta-resorcylic acid is taken as a model ...

De Gruyter2013

Nanostructured Catalysts for the Continuous Reduction of Nitrates and Bromates in Water

Lioubov Kiwi

Nanostructured C-based catalysts have been developed to be used in continuously operated (open-flow) reactors for the removal of bromates and nitrates from polluted water. The catalysts contain transition-metal (Pd, Cu, and Sn) nanoparticles (NPs) supporte ...

Amer Chemical Soc2013

Multi-injection microstructured reactor for intensification of fast exothermic reactions: proof of concept

Thomas Maeder, Lioubov Kiwi, Albert Renken, Bo Jiang, Julien Haber

Quasi-instantaneous exothermic reactions lead to the formation of unwanted hot spots even when carried out in conventional microstructured reactors (MSR) with tube diameter of 100 − 1000 μm. For this reason, alternative MSR designs are warranted to enable ...

Walter de Gruyter2013

Effects 0f Microfluidics on Preparative Chemistry Processes

Lioubov Kiwi, Albert Renken, Madhvanand Namadeo Kashid

This chapter deals with the effects of microfluidics on preparative chemistry processes. The main characteristic features of microstructured reactors (MSR) are their high surface area-to-volume ratio in the range from 10000 to 50000 m2/m3. Various paramete ...

wiley2013

Sintered metal fibers coated with transition metal oxides as structured catalysts for hydrogen peroxide decomposition

Lioubov Kiwi, Julien Haber

This study aimed at the development of active and stable structured catalyst for the decomposition of hydrogen peroxide under industrial conditions. Sintered metal fibers of stainless steel (SMFss) in the form of flat panels were surface coated by differen ...

Elsevier2013

Bromate catalytic reduction in continuous mode using metal catalysts supported on monoliths coated with carbon nanofibers

Lioubov Kiwi

Nitrogen-doped and un-doped carbon nanofibers layers, denoted as N-CNFs and CNFs respectively, coating the walls of cordierite monoliths have been used as support for Pd and Ru catalyst. They have been tested in bromate reduction in batch and continuous op ...

Elsevier2013

Self-Cleaning Textiles Modified by TiO2 and Bactericide Textiles Modified by Ag and Cu

Lioubov Kiwi, César Pulgarin

During the last few years the development of innovative textiles with added value has become a focus of interest in the textile industry. The use of TiO2 and TiO2/SiO2 in the form of semiconductor colloids or/and powders or a combination of both leads to p ...

John Wiley & Sons, Ltd2013

Heterogeneous Catalysis in Switzerland

Lioubov Kiwi, Davide Ferri, Javier Perez-Ramirez

Swiss Chemical Soc2012

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