Exsolution of Nickel Nanoparticles from Mixed‐Valence Metal Oxides: A Quantitative Evaluation by Magnetic Measurements,Particle & Particle Systems Characterization

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Exsolution of Nickel Nanoparticles from Mixed‐Valence Metal Oxides: A Quantitative Evaluation by Magnetic Measurements
Particle & Particle Systems Characterization ( IF 2.7 ) Pub Date : 2020-01-28 , DOI: 10.1002/ppsc.201900472
Victor B. Tinti ₁ , Debora Marani ₁ , Andre S. Ferlauto ₁ , Fabio C. Fonseca ₂ , Vincenzo Esposito ₃ , Daniel Z. Florio ₁

Affiliation

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₋_xSr_x)(Cr₁₋_yNi_y)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.

中文翻译：

从混合价金属氧化物中去除镍纳米颗粒：通过磁测量的定量评估

演示了一种快速，准确的实验方法，可以使用磁测量来评估溶解的金属纳米颗粒的比例。为基准，纳米金属镍从（LA出溶_1-_X的Sr _X）（CR _1-_Ý镍_Ý）O _3-_δ由于其高度相关性而被用作固体氧化物燃料电池组件。该方法基于溶解的金属镍（铁磁性）和掺Sr的亚铬酸镧镧陶瓷基质（顺磁性）的磁响应差异。电子显微镜分析证明，溶解的镍导致粘附在掺锶亚铬酸镧陶瓷基体表面的纳米颗粒相干。获得的结果表明该方法是研究铁磁纳米颗粒溶解的快速灵敏方法。

更新日期：2020-01-28

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