Exsolution of Nickel Nanoparticles from Mixed-Valence Metal Oxides: A Quantitative Evaluation by Magnetic Measurements

Victor B. Tinti, Debora Marani, Andre S. Ferlauto, Fabio Coral Fonseca, Vincenzo Esposito, Daniel Zanetti De Florio*

*Corresponding author for this work

Research output: Contribution to journalJournal articleResearchpeer-review

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Abstract

A fast and accurate experimental method is demonstrated to assess the fraction of exsolved metallic nanoparticles using magnetic measurements. As a benchmark, nanometric metallic nickel exsolved from (La1−xSrx)(Cr1−yNiy)O3−δ is used for its high relevance as a solid oxide fuel cell component. The method is based on the difference in the magnetic response of the exsolved metallic nickel (ferromagnetic) and Sr‐doped lanthanum chromite ceramic matrix (paramagnetic). The exsolved nickel results in coherent nanoparticles pinned on the surface of the Sr‐doped lanthanum chromite ceramic matrix, as evidenced by electron microscopy analyses. The results obtained indicate the procedure as a fast and sensitive method to study the exsolution of ferromagnetic nanoparticles.
Original languageEnglish
Article number1900472
JournalParticle & Particle Systems Characterization
Volume37
Issue number2
Number of pages7
ISSN0934-0866
DOIs
Publication statusPublished - 2020

Keywords

  • Exsolution
  • Magnetic measurements
  • Nanoparticles

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