High-entropy oxides (HEOs) are an emerging class of ceramic materials whose stability arises from high configurational entropy. The incorporation of multiple cations within a single crystal lattice leads to unique structural, chemical, and physical properties, including high thermal and chemical stability, tunable electronic structures, and broad application potential. Owing to these features, HEOs hold great promise in catalysis, energy storage and conversion, optoelectronics, magnetic materials, and protective coatings. Their adaptability and outstanding multifunctional characteristics pave the way for sustainable development and the advancement of next-generation technologies.
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