Šarić Stjepan, Kojčinović Jelena, Tatar Dalibor, Djerdj Igor
Department of Chemistry, Josip Juraj Strossmayer University of Osijek, Cara Hadrijana 8/A, HR-31000 Osijek, Croatia.
Molecules. 2025 Feb 27;30(5):1082. doi: 10.3390/molecules30051082.
Rare-earth high-entropy oxides are a new promising class of multifunctional materials characterized by their ability to stabilize complex, multi-cationic compositions into single-phase structures through configurational entropy. This feature enables fine-tuning structural properties such as oxygen vacancies, lattice distortions, and defect chemistry, making them promising for advanced technological applications. While initial research primarily focused on their catalytic performance in energy and environmental applications, recent research demonstrated their potential in optoelectronics, photoluminescent materials, and aerospace technologies. Progress in synthesis techniques has provided control over particle morphology, composition, and defect engineering, enhancing their electronic, thermal, and mechanical properties. Rare-earth high-entropy oxides exhibit tunable bandgaps, exceptional thermal stability, and superior resistance to phase degradation, which positions them as next-generation materials. Despite these advances, challenges remain in scaling up production, optimizing compositions for specific applications, and understanding the fundamental mechanisms governing their multifunctionality. This review provides a comprehensive analysis of the recent developments in rare-earth high-entropy oxides as relatively new and still underrated material of the future.
稀土高熵氧化物是一类新型且颇具潜力的多功能材料，其特点是能够通过构型熵将复杂的多阳离子组成稳定在单相结构中。这一特性使得诸如氧空位、晶格畸变和缺陷化学等结构性质能够得到微调，使其在先进技术应用方面颇具前景。虽然最初的研究主要集中在它们在能源和环境应用中的催化性能，但最近的研究表明它们在光电子学、光致发光材料和航空航天技术方面具有潜力。合成技术的进步使得能够控制颗粒形态、组成和缺陷工程，从而增强了它们的电子、热和机械性能。稀土高熵氧化物具有可调节的带隙、出色的热稳定性和卓越的抗相降解能力，这使其成为下一代材料。尽管取得了这些进展，但在扩大生产规模、针对特定应用优化组成以及理解支配其多功能性的基本机制方面仍存在挑战。本文综述对稀土高熵氧化物作为一种相对较新且仍被低估的未来材料的最新进展进行了全面分析。
