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<p>Perovskite-type oxides (ABO<sub>3</sub>), featuring lanthanum at the A-site and transition metals at the B-site, have attracted considerable attention due to their structural flexibility and redox-active <i>d</i>-orbitals. Recently, High Entropy Perovskite Oxide catalysts have emerged as promising materials, owing to several key attributes: phase stabilization driven by high configurational entropy, enhanced resistance to sintering due to sluggish diffusion, lattice distortion that promotes reactivity, and the “cocktail effect,” which enables synergistic electronic and structural tuning. The selection of transition metals at the B-site plays a critical role in determining catalytic performance. In this study, we investigated two high entropy compositions—LaMg<sub>0.2</sub>Fe<sub>0.2</sub>Co<sub>0.2</sub>Ni<sub>0.2</sub>Mn<sub>0.2</sub>O<sub>3</sub> and LaMg<sub>0.2</sub>Fe<sub>0.2</sub>Co<sub>0.2</sub>Ni<sub>0.2</sub>Cu<sub>0.2</sub>O<sub>3</sub>—by comparing their catalytic activity, stability, and syngas selectivity, with particular emphasis on the role of exsolved nanoparticles in enhancing methane reforming performance.</p> Graphical abstract <p></p>

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Exploring La-Based High Entropy Perovskites for Syngas Production Via Methane Reforming

  • 期刊论文

  • 发表日期：

    2025年9月26日

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  • Aathira Bhaskaran,
  • Satyapaul A. Singh,
  • Sounak Roy

摘要

Perovskite-type oxides (ABO3), featuring lanthanum at the A-site and transition metals at the B-site, have attracted considerable attention due to their structural flexibility and redox-active d-orbitals. Recently, High Entropy Perovskite Oxide catalysts have emerged as promising materials, owing to several key attributes: phase stabilization driven by high configurational entropy, enhanced resistance to sintering due to sluggish diffusion, lattice distortion that promotes reactivity, and the “cocktail effect,” which enables synergistic electronic and structural tuning. The selection of transition metals at the B-site plays a critical role in determining catalytic performance. In this study, we investigated two high entropy compositions—LaMg0.2Fe0.2Co0.2Ni0.2Mn0.2O3 and LaMg0.2Fe0.2Co0.2Ni0.2Cu0.2O3—by comparing their catalytic activity, stability, and syngas selectivity, with particular emphasis on the role of exsolved nanoparticles in enhancing methane reforming performance.

Graphical abstract