Effects of exsolution on the stability and morphology of Ni nanoparticles on BZY thin films

Yttria doped barium zirconate (BZY) is of interest for use as a catalyst support material, supporting exsolved Ni nanoparticles. Exsolution has been hypothesized to impart catalytic nanoparticles with exceptional resistance particle coarsening, known degradation mechanism in catalysts. However, the mechanisms and kinetics nanoparticle coarsening BZY are unknown. This work analyzes on epitaxial thin films at three temperatures (600, 700, 800 ? C) over time span 150 h. It demonstrated that transitions from an Ostwald ripening process migration coalescence after particles reach critical size. The behavior BZY/Ni shown be dependent surface orientation, (111) oriented least. preferred orientation relationships between (100), (110), determined. Additionally, morphology produced through exsolution film dewetting compared, showing socketing interfacial energy independent preparation method.