Exsolution of Fe-based pyramidal nanostructures from a noble metal doped perovskite matrix

Homogeneous pyramidal oxide exsolution is demonstrated for the first time leveraging a La_0.05Ag_0.05Sr_0.90FeO₃ perovskite. The impressive structures were comprehensively characterised using XRD, SEM, TEM, XPS, and DFT to reveal their structural and chemical identity. The hierarchical oxide formation highlights the potential of exsolution as a nano-engineering method for developing oxide-based catalysts.