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

Vinodkumar, T and Mukherjee, Deboshree and Ch, Subrahmanyam and Reddy, Benjaram M (2018) Investigation on the physicochemical properties of Ce0.8Eu0.1M0.1O2−δ (M = Zr, Hf, La, and Sm) solid solutions towards soot combustion. New Journal of Chemistry, 42 (7). pp. 5276-5283. ISSN 1144-0546

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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-delta (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-delta > Ce0.8Eu0.1Sm0.1O2-delta > Ce0.8Eu0.1Hf0.1O2-delta > Ce0.8Eu0.1Zr0.1O2-delta > Ce0.9Eu0.1O2-delta > 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.

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IITH Creators:
IITH CreatorsORCiD
Ch, Subrahmanyamhttps://orcid.org/0000-0002-2643-3854
Item Type: Article
Uncontrolled Keywords: GREEN MULTICOMPONENT SYNTHESIS; OXYGEN STORAGE CAPACITY; CATALYTIC-ACTIVITY; CO OXIDATION; DOPED CERIA; STRUCTURAL-CHARACTERIZATION; AQUEOUS-MEDIUM; DIESEL SOOT; CEO2; NO
Subjects: Chemistry
Divisions: Department of Chemistry
Depositing User: Team Library
Date Deposited: 19 Apr 2018 04:49
Last Modified: 19 Apr 2018 04:49
URI: http://raiith.iith.ac.in/id/eprint/3876
Publisher URL: http://doi.org/10.1039/c8nj00007g
OA policy: http://www.sherpa.ac.uk/romeo/issn/1144-0546/
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