Geodesic
Formation of the metal-oxide nanocomposites during the partial reduction of Nd--Sr nickelates
Nanosistemy: fizika, himiâ, matematika, Tome 14 (2023) no. 6, pp. 672-678

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A thermal reduction of Nd$_{2-x}$Sr$_x$NiO$_{4-\delta}$ ($x$ = 0–1.4) solid solutions in an Ar/H$_2$ gas mixture occurs in several separate stages. The initial stages of reduction presumably related to the reduction of Ni$^{3+}$ to Ni$^{2+}$ cause only minor changes in the initial K$_2$NiF$_4$ type structure and retain the morphology of the complex oxide particles. Occasionally, this process is accompanied by the appearance of Ni metal nanoparticles at the surface of oxide grains. As-obtained Ni/metal oxide nanocomposites similar to the products of redox exsolution demonstrate noticeable catalytic activity in the reaction of CO$_2$ hydrogenation at T = 350–400$^\circ$C.
Keywords: thermal reduction, catalysis, CO$_2$ hydrogenation.
Mots-clés : nanoparticles, nanocomposites, redox exsolution 
@article{NANO_2023_14_6_a6,
     author = {Sergey A. Malyshev and Oleg A. Shlyakhtin and Grigorii M. Timofeev and Galina N. Mazo and Ilya V. Roslyakov and Aleksander V. Vasiliev and Tatiana B. Shatalova and Aleksander L. Kustov},
     title = {Formation of the metal-oxide nanocomposites during the partial reduction of {Nd--Sr} nickelates},
     journal = {Nanosistemy: fizika, himi\^a, matematika},
     pages = {672--678},
     publisher = {mathdoc},
     volume = {14},
     number = {6},
     year = {2023},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/NANO_2023_14_6_a6/}
}
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AU  - Ilya V. Roslyakov
AU  - Aleksander V. Vasiliev
AU  - Tatiana B. Shatalova
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%A Sergey A. Malyshev
%A Oleg A. Shlyakhtin
%A Grigorii M. Timofeev
%A Galina N. Mazo
%A Ilya V. Roslyakov
%A Aleksander V. Vasiliev
%A Tatiana B. Shatalova
%A Aleksander L. Kustov
%T Formation of the metal-oxide nanocomposites during the partial reduction of Nd--Sr nickelates
%J Nanosistemy: fizika, himiâ, matematika
%D 2023
%P 672-678
%V 14
%N 6
%I mathdoc
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Sergey A. Malyshev; Oleg A. Shlyakhtin; Grigorii M. Timofeev; Galina N. Mazo; Ilya V. Roslyakov; Aleksander V. Vasiliev; Tatiana B. Shatalova; Aleksander L. Kustov. Formation of the metal-oxide nanocomposites during the partial reduction of Nd--Sr nickelates. Nanosistemy: fizika, himiâ, matematika, Tome 14 (2023) no. 6, pp. 672-678. http://geodesic.mathdoc.fr/item/NANO_2023_14_6_a6/