Physico-Chemical Study on the State of Cobalt in a Precipitated Cobalt-Aluminum Oxide System Full article
Journal |
PCCP: Physical Chemistry Chemical Physics
ISSN: 1463-9076 , E-ISSN: 1463-9084 |
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Output data | Year: 2002, Volume: 4, Number: 17, Pages: 4236-4243 Pages count : 8 DOI: 10.1039/b201967a | ||||||
Tags | aluminum oxide; cobalt; hydrogen; hydrotalcite; inert gas | ||||||
Authors |
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Affiliations |
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Funding (1)
1 | Russian Foundation for Basic Research | 00-15-97446 |
Abstract:
The evolution of Co–Al (1 ∶ 1) hydroxycarbonate with a hydrotalcite-like structure during its consequent calcination in an inert gas flow and reduction in H2 has been studied by means of X-ray diffraction, infrared spectroscopy, UV–VIS diffusive reflectance spectroscopy and magnetic susceptibility measurements. The oxidation of Co2+ species to Co3+ state during the calcination in the inert gas medium occurs simultaneously with the formation of a highly inverted anion-modified spinel-like structure. The samples reduced at 480 °C and 620 °C contain metallic cobalt particles. Ferromagnetic and paramagnetic contributions are distinguished and evaluated. The spontaneous magnetization of the sample reduced at 480 °C increases monotonously with the temperature in the range of 78–300 K. The correlation of the results with earlier data on physico-chemical and catalytic properties has been discussed.
Cite:
Khassin A.A.
, Anufrienko V.F.
, Ikorskii V.N.
, Plyasova L.M.
, Kustova G.N.
, Larina T.V.
, Molina I.Y.
, Parmon V.N.
Physico-Chemical Study on the State of Cobalt in a Precipitated Cobalt-Aluminum Oxide System
PCCP: Physical Chemistry Chemical Physics. 2002. V.4. N17. P.4236-4243. DOI: 10.1039/b201967a WOS Scopus РИНЦ
Physico-Chemical Study on the State of Cobalt in a Precipitated Cobalt-Aluminum Oxide System
PCCP: Physical Chemistry Chemical Physics. 2002. V.4. N17. P.4236-4243. DOI: 10.1039/b201967a WOS Scopus РИНЦ
Dates:
Submitted: | Feb 26, 2002 |
Accepted: | Jul 2, 2002 |
Published online: | Jul 26, 2002 |
Published print: | Aug 15, 2002 |
Identifiers:
Web of science | WOS:000177527500022 |
Scopus | 2-s2.0-0035982146 |
Elibrary | 13395173 |
Chemical Abstracts | 2002:625430 |
Chemical Abstracts (print) | 137:206957 |
OpenAlex | W2138032890 |