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Unique redox properties in defective CeO2-x nanocrystallines synthesized by laser melting
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Number of Authors: 62018 (English)In: Science China Materials, ISSN 2095-8226, Vol. 61, no 8, p. 1078-1084Article in journal (Refereed) Published
Abstract [en]

Defects in cerium oxide, especially oxygen vacancies, play an essential role in its versatile applications and are efficiently preserved at ambient conditions in a non-equilibrium process. Herein, defective CeO2-x with heterogeneous structure was synthesized by high-energy laser melting, where a large amount of oxygen vacancies and Ce3+ could be introduced, leading to improved visible light absorption, narrowed bandgap and room temperature ferromagnetism. Moreover, this laser melted CeO2-x exhibits significantly enhanced low-temperature oxidation behaviors than the counterpart prepared by normal hydrogen-reduction. This unique redox performance could be attributed to the intragranular diffusion at the boundaries of assembled nanocrystallites. This method paves a new way for introducing unique multi-functions in oxide ceramics.

Place, publisher, year, edition, pages
2018. Vol. 61, no 8, p. 1078-1084
Keywords [en]
cerium oxide, laser melting, defect, boundary, redox property
National Category
Chemical Sciences Materials Engineering
Identifiers
URN: urn:nbn:se:su:diva-159028DOI: 10.1007/s40843-017-9226-5ISI: 000439332800008OAI: oai:DiVA.org:su-159028DiVA, id: diva2:1245672
Available from: 2018-09-05 Created: 2018-09-05 Last updated: 2018-09-05Bibliographically approved

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Shen, Zhijian
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Department of Materials and Environmental Chemistry (MMK)
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