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Synthesis and characterization of metastable CeO2-ZrO2 solid solution obtained by polymerized complex method

Miśta W., Rayment T., Hanuza J., Macalik L.

Materials Science Poland

2004

Vol. 22, No. 2

153--170

The paper describes the preparation and characterization of nano-size metastable tetragonal CeO2–ZrO2 mixed oxides prepared by a polymerized complex method. A glycine–ethylene glycol solution containing Ce3+ and Zr4+ ions was polymerized at 80–110 °C to form a viscous transparent resin without any visible precipitation. After heat-treatment at relatively low temperature (ca 250 °C) on a hot plate in static air, the solid precursor ignited in part due to self-combustion, resulting in the formation of a nanocrystalline, compositionally-homogeneous solid solution. Its structure was confirmed using X-ray diffraction, HRTEM and Raman spectroscopy. The phase separation in CeO2–ZrO2 system on a subsequent heat-treatment in air and in a mixture of H2 and He was also investigated up to 1100 °C.

Characterization and catalytic properties of CeO2-ZrO2 solid solution.

Miśta W., Rayment T., Zawadzki M.

Prace Naukowe Instytutu Chemii i Technologii Nafty i Węgla Politechniki Wrocławskiej. Konferencje

1999

Vol. 9, nr 56

237-241

The nanocrystalline, metastable tetragonal (t') ceria-circonia solid solution were prepared by the polymerized complex method at a relatively low temperature. The as prepared transparent homogenous hybrid inorganic precursors can be also used in thin film applications. The solid materials were characterized by XRD, TEM, DTA/TG and nitrogen adsorption method. The catalytic activity of Pt/CeO2-ZrO2 catalyst in total oxidation of iso-butene and possibility of the gasification of graphite were evaluated.

Otrzymano nanokrystaliczne, metastabilne roztwory stałe Ce)2-ZrO2 o strukturze tatragonalnej (t') za pomocą metody 'polimerycznej' w wyjątkowo niskich temperaturach. Tak otrzymane klarowne, homogenne nieorganiczno-organiczne prekursory mogą być zastosowane do nanoszenia cieńkich filmów. Materiały lite charakteryzowano za pomocą technik XRD, TEM, DTA/TG oraz niskotemperaturowej adsorpcji azotu. Określono aktywność katalityczną katalizatorów Pt/CeO2-ZrO2 w całkowitym spalaniu izo-butenu oraz możliwość zgazowania grafitu.