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Issue 7, 2018
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Investigation on the physicochemical properties of Ce0.8Eu0.1M0.1O2−δ (M = Zr, Hf, La, and Sm) solid solutions towards soot combustion

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Abstract

This investigation focuses on the manipulation of the physicochemical properties and oxygen defect concentration of europium doped CeO2 by the introduction of a second dopant (co-dopant, M). Accordingly, in this study a series of Ce0.8Eu0.1M0.1O2−δ (M = Zr, Hf, La, and Sm) nano-oxides were prepared and tested for diesel soot oxidation catalysis. The systematic characterization studies indicated successful incorporation of both dopants in the cubic fluorite crystal structure of CeO2. A remarkable enhancement in the reduction properties and oxygen defect concentration was observed for the co-doped samples from structural and chemical analyses. The aliovalent co-doped materials exhibited better performance than the isovalent co-doped materials. The catalytic activity order of the prepared materials towards model soot oxidation was Ce0.8Eu0.1La0.1O2−δ > Ce0.8Eu0.1Sm0.1O2−δ > Ce0.8Eu0.1Hf0.1O2−δ > Ce0.8Eu0.1Zr0.1O2−δ > Ce0.9Eu0.1O2−δ > CeO2. The most favorable modification of the physicochemical properties of europium doped ceria was ascertained in the presence of La as a co-dopant compared to other combinations investigated. The correlation of the physicochemical properties with the catalytic activity has also been clearly demonstrated in the manuscript.

Graphical abstract: Investigation on the physicochemical properties of Ce0.8Eu0.1M0.1O2−δ (M = Zr, Hf, La, and Sm) solid solutions towards soot combustion

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Publication details

The article was received on 01 Jan 2018, accepted on 18 Feb 2018 and first published on 20 Feb 2018


Article type: Paper
DOI: 10.1039/C8NJ00007G
Citation: New J. Chem., 2018,42, 5276-5283
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    Investigation on the physicochemical properties of Ce0.8Eu0.1M0.1O2−δ (M = Zr, Hf, La, and Sm) solid solutions towards soot combustion

    T. Vinodkumar, D. Mukherjee, Ch. Subrahmanyam and B. M. Reddy, New J. Chem., 2018, 42, 5276
    DOI: 10.1039/C8NJ00007G

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