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Registration Number

0221U101067, 0120U002090 , R & D reports

Title

Development of synthesis methods of polymetallic nanostructures based on d-elements for electrically conductive compositions and catalytic nanosystems

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Head

Kytsia Andrii R,

Registration Date

13-01-2021

Organization

Department of Physical and Chemistry of Combustible Fossils LM Litvinenko of the National Academy of Sciences of Ukraine

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As a result of the investigations on the first stage of the project the follows can be concluded: 1. The influence of synthesis conditions (temperature and precursor concentration) on the kinetics of nickel nanoparticle formation has been studied. It is established that the orders of reactions of nucleation and growth of nickel nanoparticles by precursor are 0.3 and 1 respectively. The values ​​of activation energies of nucleation and growth of nickel nanoparticles are calculated. It is shown that the values ​​of activation energies of nucleation and growth of NiNPs are twice lower than Ea of nickel nanoparticle formation under conditions of their homogeneous nucleation, which indicates the participation of the surface of Ni(OH)2 sol particles in the nucleation process of NiNPs. 2. The chemical equilibria for complex compounds of nickel and hydrazine in ethylene glycol solutions were investigated by spectrophotometry and the stoichiometry of the complex compound of nickel and hydrazine, which is a precursor for the synthesis of nickel nanoparticles, was established. 3. The influence of the composition of the reaction mixture on the composition and morphology of the obtained bimetallic Ni-Co nanoparticles was studied. It is shown that in all of cases the composition of the initial reaction mixture correlates well with the composition of the obtained products. The morphology of Ni-Co nanoparticles was studied by scanning electron microscopy. It is shown that with increasing of cobalt content, the average diameter of nanoparticles increases from 250 nm for Ni0.67Co0.33 to several microns for pure cobalt.

Product Description

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Antonyshyn Iryna S
Bazylyak Liliya I
Dozhdzhanyk Veronika V
Fedorchuk Anatoliy O

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2021-01-13