Physico-Chemical Study on the State of Cobalt in a Precipitated Cobalt-Aluminum Oxide System | Sciact - CRIS-system of Boreskov Institute of Catalysis

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

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

Khassin Alexander A. ¹ , Anufrienko Vladimir F. ¹ , Ikorskii Vladimir N. ^2,3 , Plyasova Lyudmila M. ¹ , Kustova Galina N. ¹ , Larina Tatyana V. ¹ , Molina Irina Yu. ¹ , Parmon Valentin N. ¹

Affiliations

1	Boreskov Institute of Catalysis, 5, Pr. Lavrentieva, Novosibirsk, Russia 630090
2	Institute of Inorganic Chemistry, 3, Pr. Lavrentieva, Novosibirsk, Russia 630090
3	International Tomographic Center, 3A, Institutskaya st., Novosibirsk, Russia 630090

Funding (1)

Russian Foundation for Basic Research

00-15-97446

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.

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 ANCAN OpenAlex

Submitted:	Feb 26, 2002
Accepted:	Jul 2, 2002
Published online:	Jul 26, 2002
Published print:	Aug 15, 2002

Web of science:	WOS:000177527500022
Scopus:	2-s2.0-0035982146
Elibrary:	13395173
Chemical Abstracts:	2002:625430
Chemical Abstracts (print):	137:206957
OpenAlex:	W2138032890

DB	Citing
Web of science	33
Scopus	34
Elibrary	34
OpenAlex	31