Cation Distribution in Cu(Cr2 – xAlx)O4 and Cu(Fe2 – xAlx)O4 According to Neutron-Diffraction Studies and Their Catalytic Properties in the Water-Gas Shift Reaction Full article
| Journal |
Journal of Surface Investigation: X-Ray, Synchrotron and Neutron Techniques
ISSN: 1027-4510 , E-ISSN: 1819-7094 |
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| Output data | Year: 2016, Volume: 10, Number: 6, Pages: 1172-1179 Pages count : 8 DOI: 10.1134/S102745101605058X | ||||
| Tags | activation energy, Cu(Cr2 − xAlx)O4 and Cu(Fe2 − xAlx)O4 spinels, neutron diffraction, water-gas shift reaction | ||||
| Authors |
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| Affiliations |
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Funding (2)
| 1 | Russian Foundation for Basic Research | 13-03-00469 |
| 2 | Russian Foundation for Basic Research | 14-29-04091 |
Abstract:
The neutron structural analysis of Cu(Cr2 − xAlx)O4 and Cu(Fe2 − xAlx)O4 (0 ≤ x ≤ 2) nanopowders is performed. The samples are prepared by the thermal decomposition of mixed hydroxy compounds at 900°C. Different spinel phases are shown to form in Cu(Cr2 − xAlx)O4: a tetragonally distorted phase when x ≤ 1.0, a cubic phase when x > 1.25, and a mixture of both phases when 1 < x < 1.25. As Al3+ ions substitute Cr3+ ions, a number of Cu2+ ions move from tetrahedral spinel sites to octahedral ones: the degree of inversion δ changes from 0 for CuCr2O4 to ≈0.4 for CuAl2O4. In the Cu(Fe2 − xAlx)O4 system, the cubic spinel forms at all x, except x = 0. The degree of inversion δ varies from 1 for CuFe2O4 to ≈0.4 for CuAl2O4 as Al3+ ions substitute Fe3+ ions. The change in the activation energy of the water-gas shift reaction correlates with the inversion of Cu-containing spinels.
Cite:
Plyasova L.M.
, Minyukova T.P.
, Yurieva T.M.
, Bobrikov I.A.
, Balagurov A.M.
Cation Distribution in Cu(Cr2 – xAlx)O4 and Cu(Fe2 – xAlx)O4 According to Neutron-Diffraction Studies and Their Catalytic Properties in the Water-Gas Shift Reaction
Journal of Surface Investigation: X-Ray, Synchrotron and Neutron Techniques. 2016. V.10. N6. P.1172-1179. DOI: 10.1134/S102745101605058X WOS Scopus РИНЦ AN OpenAlex
Cation Distribution in Cu(Cr2 – xAlx)O4 and Cu(Fe2 – xAlx)O4 According to Neutron-Diffraction Studies and Their Catalytic Properties in the Water-Gas Shift Reaction
Journal of Surface Investigation: X-Ray, Synchrotron and Neutron Techniques. 2016. V.10. N6. P.1172-1179. DOI: 10.1134/S102745101605058X WOS Scopus РИНЦ AN OpenAlex
Original:
Плясова Л.М.
, Минюкова Т.П.
, Юрьева Т.М.
, Бобриков И.А.
, Балагуров А.М.
Распределение катионов в Cu(Cr2 – xAlx)O4 и Cu(Fe2 – xAlx)O4 по данным нейтронографических исследований и каталитические свойства в реакции паровой конверсии СО
Поверхность. Рентгеновские, синхротронные и нейтронные исследования. 2016. №11. С.54-61. DOI: 10.7868/S0207352816110159 РИНЦ OpenAlex
Распределение катионов в Cu(Cr2 – xAlx)O4 и Cu(Fe2 – xAlx)O4 по данным нейтронографических исследований и каталитические свойства в реакции паровой конверсии СО
Поверхность. Рентгеновские, синхротронные и нейтронные исследования. 2016. №11. С.54-61. DOI: 10.7868/S0207352816110159 РИНЦ OpenAlex
Dates:
| Submitted: | Feb 20, 2016 |
| Published print: | Nov 1, 2016 |
| Published online: | Dec 6, 2016 |
Identifiers:
| Web of science: | WOS:000391039700007 |
| Scopus: | 2-s2.0-85002213822 |
| Elibrary: | 29472653 |
| Chemical Abstracts: | 2016:2005486 |
| OpenAlex: | W2560679687 |