scholarly journals Bimetallic Pd-Cu-composites of polyaniline in electrocatalytic hydrogenation of phenylacetylene

2017 ◽  
pp. 4-14
Author(s):  
Elena Soboleva ◽  
Yakha Visurkhanova ◽  
Nina Ivanova
Keyword(s):  
Catalytic Activity ◽  
Electrochemical Reduction ◽  
Polymer Matrix ◽  
Sodium Borohydride ◽  
Metal Content ◽  
Chemical Reduction ◽  
Metal Particles ◽  
Ethyl Benzene ◽  
Electrocatalytic Hydrogenation ◽  
Electro Catalytic Activity

Bimetallic Pd-Cu-composites of polyaniline prepared by introducing metals (II) chlorides in the process of oxida-tive polymerization of aniline with and without chemical reduction by sodium borohydride are applied to copper cath-ode activation in electrohydrogenation of phenylacetylene in basic aqueous ethanolic solutions of catholyte. Electro-catalytic activity of composites that they exhibited in the process is due to formation of metal particles (and their al-loys) by electrochemical reduction of metal cations in the polymer matrix. The main hydrogenation products are ethyl benzene and 1,4-diphenylbutane, the yields of which influence metal content in the studied composites.

Electrocatalytic Hydrogenation of CO2 to Hydrocarbons on Gold Catalyst in the Presence of Ionic Liquid

2021 ◽  
Vol 43 (6) ◽  
pp. 665-665
Author(s):  
Arshid M Ali Arshid M Ali ◽  
Aqeel Taimoor Aqeel Taimoor ◽  
Ayyaz Muhammad Ayyaz Muhammad ◽  
Muhammad A Daous and Usman Saeed Muhammad A Daous and Usman Saeed
Keyword(s):  
Ionic Liquid ◽  
Catalytic Activity ◽  
Activated Carbon ◽  
Surface Morphology ◽  
Gold Catalyst ◽  
Impregnation Method ◽  
Electrocatalytic Hydrogenation ◽  
Wet Impregnation ◽  
Wet Impregnation Method ◽  
Electro Catalytic Activity

This study is aimed to investigate the electro-catalytic activity of Au supported on both CeO2 and activated carbon (AC) to convert CO2 to mixture of C1-C4 hydrocarbons in the presence of ionic liquid (IL) 1-butyl-3-methylimidazolium methylsulfonate. The studied catalyst samples were prepared by using simultaneous wet impregnation method. The sample containing 0.6 % Au showed higher electro-catalytic activity than the sample contained 0.3 % Au. Both, the average Au particles size and the transformation of layered non-uniformed semi-oval structure to flaked tiny circular like-structure were mainly responsible for the higher catalytic activity of 0.6Au-CeO2-AC sample. In addition, the overall electro-catalytic activity depends upon the applied reaction voltage. Overall, the presence of IL, the surface morphology, and average Au particles size had played a key role in the electro-catalytic conversion of CO2 to hydrocarbons.

scholarly journals Structure formation peculiarities of nickel-filled polyvinylpyrrolidone copolymers during polymerization with simultaneous Ni2+ reduction

2020 ◽  
Vol 3 (2) ◽  
pp. 127-134
Author(s):  
O. M. Grytsenko ◽  
◽  
O. V. Suberlyak ◽  
L. Dulebovа ◽  
I. Gaydos ◽  
...  
Keyword(s):  
Molecular Weight ◽  
Polymer Matrix ◽  
Chemical Reduction ◽  
Structural Parameters ◽  
Reduction Process ◽  
Metal Particles ◽  
Polymerization Process ◽  
Nickel Ions ◽  
Monomer Composition ◽  
Matrix Volume

The course of the grafted polymerization of 2-hydroxyethylmethacrylate on polyvinylpyrrolidone with the formation of a reticulated copolymer with simultaneously chemical reduction of nickel ions is confirmed. The influence of the reduction process on the structural parameters of the polymeric matrix – the grafting efficiency and the content of polyvinylpyrrolidone in the copolymer, the molecular weight between crosslinks is established. The influence of the presence of polymer-monomer composition components on the particles formation of nickel filler is investigated. It has been found that the nickel ions reduction during the polymerization process promotes a uniform distribution of the formed metal particles in the polymer matrix volume.

Effects of Microwave-synthesizing Parameters on Structure and Electro-catalytic Activity of Pt2Mo/C towards Methanol Oxidation

2010 ◽  
Vol 25 (4) ◽  
pp. 359-364 ◽  
Author(s):  
Xin ZENG ◽  
Xian-Xia YUAN ◽  
Xiao-Yun XIA ◽  
Juan DU ◽  
Hui-Juan ZHANG ◽  
...  
Keyword(s):  
Catalytic Activity ◽  
Methanol Oxidation ◽  
Electro Catalytic Activity

scholarly journals Quantitative Determination of Paraquat in a Fatal Intoxication by HPLC-DAD following Chemical Reduction with Sodium Borohydride

2000 ◽  
Vol 24 (2) ◽  
pp. 116-121 ◽  
Author(s):  
K. Arys ◽  
J. Van Bocxlaer ◽  
K. Clauwaert ◽  
W. Lambert ◽  
M. Piette ◽  
...  
Keyword(s):  
Quantitative Determination ◽  
Sodium Borohydride ◽  
Chemical Reduction ◽  
Fatal Intoxication

scholarly journals Comparative Study of Ag Nanostructures: Molecular Simulations, Electrochemical Behavior, and Antibacterial Effect

2016 ◽  
Vol 2016 ◽  
pp. 1-9 ◽  
Author(s):  
Álvaro de Jesús Ruíz-Baltazar ◽  
Simón Yobanny Reyes-López ◽  
D. Larrañaga ◽  
R. Pérez
Keyword(s):  
Cyclic Voltammetry ◽  
Ethylene Glycol ◽  
Comparative Study ◽  
Sodium Borohydride ◽  
Electrochemical Behavior ◽  
Antibacterial Effect ◽  
Chemical Reduction ◽  
Molecular Simulations ◽  
The Other ◽  
E Coli

Nanoparticles of Ag with different sizes and structures were obtained and studied. Two methods for reductions of Ag ions were employed, chemical reduction by sodium borohydride and ethylene glycol. Cuboctahedral and icosahedral structures were obtained. Molecular simulations were carried out in order to evaluate the reactivity of both structures. On the other hand, the electrochemical activity and antibacterial effect (E. coli) of the cuboctahedral and icosahedral structures were measured experimentally. The results obtained by molecular simulation, cyclic voltammetry, and antibacterial effect were compared and discussed in this work.

scholarly journals A Review on the Catalytic Hydrogenation of Bromate in Water Phase

Catalysts ◽  
2021 ◽  
Vol 11 (3) ◽  
pp. 365
Author(s):  
Jose Luis Cerrillo ◽  
Antonio Eduardo Palomares
Keyword(s):  
Catalytic Activity ◽  
Ion Exchange ◽  
Reaction Mechanisms ◽  
Catalytic Reduction ◽  
Environmental Concern ◽  
Chemical Reduction ◽  
Catalyst Stability ◽  
Polluted Water ◽  
Water Composition

The presence of bromate in water sources generates environmental concern due to its toxicity for humans. Diverse technologies, like membranes, ion exchange, chemical reduction, etc., can be employed to treat bromate-polluted water but they produce waste that must be treated. An alternative to these technologies can be the catalytic reduction of bromate to bromide using hydrogen as a reducing agent. In this review, we analyze the research published about this catalytic technology. Specifically, we summarize and discuss about the state of knowledge related to (1) the different metals used as catalysts for the reaction; (2) the influence of the support on the catalytic activity; (3) the characterization of the catalysts; (4) the reaction mechanisms; and (5) the influence of the water composition in the catalytic activity and in the catalyst stability. Based on published papers, we analyze the strength and weaknesses of this technique and the possibilities of using this reaction for the treatment of bromate-polluted water as a sustainable process.

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