Journal
CERAMICS INTERNATIONAL
Volume 48, Issue 9, Pages 12368-12375Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.ceramint.2022.01.101
Keywords
Perovskite ferrite; Exsolution; Thin films; Electrical response
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Funding
- ShanghaiTech University
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The exsolution of metallic nanoparticles from oxide supports provides a new approach for designing high-performance materials. In this study, Pd nanoparticles with an average size of 100 nm were homogeneously exsolved in compressively strained La0.6Sr0.4Fe0.9Pd0.1O3-delta thin films. The exsolved nanoparticles showed a more stable electrical response in redox cycling, attributed to their dynamic nature. The control of nanoparticle exsolution offers a new way to regulate the electrical response of perovskite oxide semiconductors.
Exsolution of metallic nanoparticles (NPs) from oxide supports offers a novel approach to design highperformance materials in the field of heterogeneous catalysis and energy conversion and storage. Here, we report the homogenous exsolution of Pd NPs with an average size of 100 nm in compressive strained La0.6Sr0.4Fe0.9Pd0.1O3-delta (LSFPd) thin films. We systematically explored the electrical resistivity and the redox stability of LSFPd thin films upon exsolution of NPs. Compared to La0.6Sr0.4FeO3-delta (LSF) thin films, whose electrical response was controlled by oxygen stoichiometry, LSFPd films showed a more stable electrical response in redox cycling with similar resistivity values both in air and hydrogen. The improved stability was attributed to dynamic and exsolution of NPs. Our study showed that the control of exsolution of NPs can provide a new way to regulate the electrical response of perovskite oxide semiconductors under external stimuli (i.e., atmosphere), which could be beneficial for the rational design of high-performance functional materials for micro solid oxide fuel cells, nano-sensors, and nano-actuators applications.
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