Nanostructured Ceria-Praseodymium and Ceria-Terbium Mixed Oxides: Relationship Between Structural Change and Catalytic Activity Towards CO Oxidation.

Author(s) Guo, M.; Yin, W.; Zhao, F.; Wang, Q.; Hu, C.
Journal J Nanosci Nanotechnol
Date Published 2019 Sep 01

The structural and textural properties of the CePrO (CP) and CePrO (CT) solid solutions were investigated by X-ray diffraction (XRD), BET surface area, transmission electron microscopy (TEM-HRTEM), UV-vis diffuse reflectance spectroscopy (UV-vis DRS), Raman spectra, and X-ray photoelectron spectroscopy (XPS). The redox recoverability and catalytic activity were analyzed by temperature-programmed reduction (TPR) and oxidation reaction using carbon monoxide as a probe molecule. It was found that the CP solid solution exhibited better structural thermal stability, oxygen storage/release capacity, as well as redox ability than that of CT solid solution, since that the microstructure and oxygen vacancy concentration of CP sample under actual using process could recover to its initial status more easily in oxygen, even at room temperature. Therefore, the CP sample presented better CO oxidation activity compared with that of CT solid solution.

DOI 10.1166/jnn.2019.16542
ISSN 1533-4880
Citation J Nanosci Nanotechnol. 2019;19(9):59996005.

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