Dependence of the preparation method on the phase composition and particle size of the binary NiO_ZrO2 system oxides

16th International Conference of Students and Young Scientists "Prospects of Fundamental Sciences Development"

自然科学（总论）

Galanov, S.^1 ; Sidorova, O.^1 ; Magaev, O.^1

Tomsk State University, 36 Lenin Ave., Tomsk

634050, Russia^1

关键词: Coprecipitation method;    Monoclinic phase;    Oxide particles;    Preparation method;    Tetragonal phasis;    Thermal influence;    Zirconium dioxide;    Zirconium dioxide particle;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/597/1/012018/pdf
DOI  :  10.1088/1757-899X/597/1/012018

学科分类：自然科学（综合）

来源: IOP

【 摘 要 】

Was studied how preparation method influences phase composition, oxide particle size and catalytic activity of the binary NiO-ZrO2 systems. The processes taking place under the thermal influence while NiO-ZrO2 catalysts are formed from precursors, obtained using a variety of methods, were determinated using the methods of simultaneous TGA-DTG/DSC analysis and XFA. Was studied the influence of the precursor preparation method upon the catalysts' phase composition, sizes of the nickel oxide and zirconium dioxide particles. The research revealed that preparation of precursor using coprecipitation method makes it possible to obtain a binary system, where nickel oxide has minimal size, determined by CSR, and monoclinic phase prevails in ZrO2, after heating it to 800 °C. The research unearthed that the catalyst exhibiting maximal catalytic activity by deep oxidation of methane is nickel oxide-zirconium dioxide, containing equal amounts of monoclinic and tetragonal phases of ZrO2.