Genesis and Structural Properties of (Ce1–xMx)0.8Ni0.2Oy (M = La, Mg) Oxides Full article
| Journal |
Journal of Structural Chemistry
ISSN: 0022-4766 , E-ISSN: 1573-8779 |
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| Output data | Year: 2020, Volume: 61, Number: 7, Pages: 1080–1089 Pages count : 10 DOI: 10.1134/S0022476620070100 | ||||||||
| Tags | cerium dioxides, solid solutions, powder X-ray diffraction analysis, electron microscopy, Raman spectroscopy, nanomaterials | ||||||||
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| Affiliations |
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Funding (1)
| 1 | Russian Foundation for Basic Research | 18-53-45012 |
Abstract:
The genesis and structural properties of (Ce1–xMx)0.8Ni0.2Oy (M = La, Mg; x = 0, 0.2, 0.5, 0.8, 1;
1.0 ≤ y ≤ 1.8) oxides that are promising catalyst precursors are studied. A complex of physicochemical methods (low-temperature nitrogen adsorption, ex situ and in situ powder X-ray diffraction, electron microscopy, Raman spectroscopy, and EDX analysis) is used to show that after the calcination at 500 °C in the oxidizing medium, (Ce1–xMx)0.8Ni0.2Oy become mesoporous materials representing substitutional solid solutions with a cubic fluorite-type structure with supported particles of the Ni-containing phase. When M = La, Ni cations are mainly stabilized in the composition of the Ce–La–Ni–O solid solution, and when M = Mg, they are stabilized in the Mg–Ni–O composition. It is found that La- or Mg-containing samples, as compared to Ce0.8Ni0.2Oy, have highly defective structures and smaller sizes of crystallites (≤ 4 nm, x ≥ 0.5). After thermal treatment of the samples in H2/Не at 800 °C, highly dispersed Ni° particles with a size of 5-10 nm are formed. Metal particles have defects and a polycrystal structure, and they are readily reoxidized in air with the formation of “core@shell” Ni@NiO structures.
Cite:
Matus E.V.
, Ismagilov I.Z.
, Ushakov V.A.
, Nikitin A.P.
, Stonkus O.A.
, Gerasimov E.Y.
, Kerzhentsev M.A.
, Bharali P.
, Ismagilov Z.R.
Genesis and Structural Properties of (Ce1–xMx)0.8Ni0.2Oy (M = La, Mg) Oxides
Journal of Structural Chemistry. 2020. V.61. N7. P.1080–1089. DOI: 10.1134/S0022476620070100 WOS Scopus РИНЦ AN OpenAlex
Genesis and Structural Properties of (Ce1–xMx)0.8Ni0.2Oy (M = La, Mg) Oxides
Journal of Structural Chemistry. 2020. V.61. N7. P.1080–1089. DOI: 10.1134/S0022476620070100 WOS Scopus РИНЦ AN OpenAlex
Original:
Матус Е.В.
, Исмагилов И.З.
, Ушаков В.А.
, Никитин А.П.
, Стонкус О.А.
, Герасимов Е.Ю.
, Керженцев М.А.
, Брахали П.
, Исмагилов З.Р.
Генезис и структурные свойства оксидов (Ce1-xMx)0.8Ni0.2Oy (M = La, Mg)
Журнал структурной химии. 2020. Т.61. №7. С.1143-1152. DOI: 10.26902/jsc_id59849RSCI РИНЦ OpenAlex
Генезис и структурные свойства оксидов (Ce1-xMx)0.8Ni0.2Oy (M = La, Mg)
Журнал структурной химии. 2020. Т.61. №7. С.1143-1152. DOI: 10.26902/jsc_id59849RSCI РИНЦ OpenAlex
Dates:
| Submitted: | Nov 6, 2019 |
| Accepted: | Feb 25, 2020 |
| Published print: | Jul 1, 2020 |
| Published online: | Sep 4, 2020 |
Identifiers:
| Web of science: | WOS:000566422200010 |
| Scopus: | 2-s2.0-85090233434 |
| Elibrary: | 45344504 |
| Chemical Abstracts: | 2020:1779893 |
| OpenAlex: | W3083471696 |