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<p>Oxides with ABO<sub>3</sub>-type perovskite structures are of great scientific interest due to their diverse technological applications. Here we demonstrate the phase formation pathways and local structural evolution of two distinct perovskite oxides synthesized from hydrogen peroxide-derived peroxo precursors. Utilizing advanced techniques, including electron real space pair distribution function analysis, we monitored their thermal evolution. Our findings reveal that the initial disorder in the B-O octahedron critically influences the crystallization path. Highly distorted B-O octahedra lead to amorphous precursors and a nucleation and growth pathway, whereas minimal distortions result in crystalline precursors undergoing topotactic phase transformation to the ABO<sub>3</sub> phase. These pathways culminate in varying disorder levels in the final nanometric materials, providing insights crucial for tailoring material properties for specific applications.</p>

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Decoding the evolution of peroxo precursors into perovskite oxides through real space analysis

  • 期刊论文

  • 出版模式：

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  • 发表日期：

    2026年4月28日

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  • Derik Tilly Machado,
  • Naga Vishnu Vardhan Mogili,
  • Tarcísio Micheli Perfecto,
  • Tanna Elyn Rodrigues Fiuza,
  • Edson Roberto Leite

摘要

Oxides with ABO3-type perovskite structures are of great scientific interest due to their diverse technological applications. Here we demonstrate the phase formation pathways and local structural evolution of two distinct perovskite oxides synthesized from hydrogen peroxide-derived peroxo precursors. Utilizing advanced techniques, including electron real space pair distribution function analysis, we monitored their thermal evolution. Our findings reveal that the initial disorder in the B-O octahedron critically influences the crystallization path. Highly distorted B-O octahedra lead to amorphous precursors and a nucleation and growth pathway, whereas minimal distortions result in crystalline precursors undergoing topotactic phase transformation to the ABO3 phase. These pathways culminate in varying disorder levels in the final nanometric materials, providing insights crucial for tailoring material properties for specific applications.