NDLI: Tuning the structural and catalytic properties of ceria by doping with Zr$^{4+}$, La$^{3+}$ and Eu$^{3+}$ cations

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Tuning the structural and catalytic properties of ceria by doping with Zr$^{4+}$, La$^{3+}$ and Eu$^{3+}$ cations

Content Provider	Springer Nature Link
Author	DURGASRI, D NAGA MALOTH, SWAMY REDDY, BENJARAM M
Copyright Year	2015
Abstract	This work attempts to gain information about the role of trivalent and tetravalent dopants on the structural and catalytic properties of ceria (CeO$_{2}$). In this study, we have prepared Zr$^{4+}$, La$^{3+}$, and Eu$^{3+}$ doped ceria (CZ, CL, and CE) by coprecipitation method and calcined at 773 K. The physicochemical characterization was achieved by using various techniques, namely, X-ray powder diffraction (XRD), Brunauer-Emmett-Teller (BET) surface area, high resolution transmission electron microscopy (HRTEM), Raman spectroscopy, temperature programmed reduction (TPR), X-ray photoelectron spectroscopy (XPS), and electron spin resonance (ESR) spectroscopy. The catalytic efficiency for soot oxidation was evaluated by thermogravimetric (TG) method and compared with undoped CeO$_{2}$. Doped CeO$_{2}$ catalysts decreased the soot oxidation temperature by more than 158 K compared to pure ceria. This is ascribed to mutual interaction and synergistic effect between the dopant species and the ceria. Among the synthesized nanocatalysts, the CE sample exhibited better performance. The observed better activity of CE was attributed to the presence of more number of oxygen vacancies, a high specific surface area, and easy reducibility as confirmed from Raman, BET surface area, and TPR measurements, respectively. Graphical Abstract Preparation and activity of La3+, Eu3+, and Zr4+ doped ceria-based materials are described. These materials are more active than pure ceria for soot oxidation. Among them, trivalent dopants effectively modified the catalytic properties of pure ceria.
Starting Page	1145
Ending Page	1153
Page Count	9
File Format	PDF
ISSN	09743626
Journal	Journal of Chemical Sciences
Volume Number	127
Issue Number	7
e-ISSN	09737103
Language	English
Publisher	Springer India
Publisher Date	2015-09-12
Publisher Institution	Indian Academy of Sciences
Publisher Place	New Delhi
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Doped ceria coprecipitation method oxygen vacancies soot oxidation Chemistry/Food Science
Content Type	Text
Resource Type	Article
Subject	Chemistry

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