DETERMINATION OF THE PHASE COMPOSITION OF CATALYST PRECURSORS FOR MULTIWALL CARBON NANOTUBES BY THE STOICHIOGRAPHIC DIFFERENTIAL DISSOLUTION METHOD
a:2:{s:4:"TYPE";s:4:"HTML";s:4:"TEXT";s:85:"L. S. Dovlitova1, A. A. Pochtar’1, V. V. Malakhov1,2";}
1Boreskov Institute of Catalysis, Siberian Branch, Russian Academy of Sciences, Novosibirsk, Russia
2Novosibirsk State University, Novosibirsk, Russia
Keywords: катализаторы синтеза МУНТ, дифференцирующее растворение, стехиографический метод, MWCNT synthesis catalysts, differential dissolution, stoichiographic method
Subsection: PROCEEDINGS OF THE CONFERENCE “METHODS FOR STUDYING THE COMPOSITION AND STRUCTURE OF FUNCTIONAL MATERIALS,” OCTOBER 21-25, 2013, NOVOSIBIRCK, RUSSIA
Abstract
The standardless stoichiographic differential dissolution (DD) method is used for phase analysis of superfine multicomponent oxide precursors of Fe-Co MWCNT synthesis catalysts obtained by the Pechini method. The analysis identifies the individual phases in the studied samples of Fe
2Co/Al
2O
3, Fe
2Co/MgO, and Fe
2Co/CaCO
3 and determines their stoichiometric composition and quantitative content. It is found that the samples are a complex mixture of superfine oxide phases the composition of which corresponds to a spinel structure and may simultaneously include both active (Fe and Co) and carrier elements (Al and Mg) to form solid solutions. It is only the Fe
2Co/CaCO
3 samples that contain a carrier-free phase the composition of which corresponds to a spinel structure.
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