Authors
Bingzhi Li, Ganggang Li, Zeyu Zhao, Ziyi Shui, Yan Zhang, Longlong Fan, Jochi Tseng, Dongshuang Wu, Zhengping Hao
Published in
Advanced materials (Deerfield Beach, Fla.). Pages e74010. Jul 07, 2026. Epub Jul 07, 2026.
Abstract
High-entropy oxides (HEOs) show great promise in heterogeneous catalysis due to their unique structural properties. However, stabilizing the amorphous structure of HEOs under high-temperature conditions remains challenging. Herein, we propose a thermodynamic synergy-driven strategy to construct the long-range disordered structure in HEO, achieving the preservation of defect-rich sites with high thermal stability. By integrating multiple metal elements with substantial atomic size differences, we construct an amorphous MnFeCoNiCuYZrOx HEO (MYZrOx-a), in which the high configurational entropy creates a thermodynamic barrier against amorphous-to-crystalline transition. This strategy also demonstrates both universality and scalability for synthesizing thermally stable amorphous HEOs. Combined experimental characterization and theoretical calculations reveal that MYZrOx-a retains short‑range disorder and abundant defect sites even after calcination at 600°C. Moreover, the stabilized high‑valence metal-oxygen vacancy (Mδ+-Ov) pairs facilitate the activation of C─H bonds and oxygen species, endowing MYZrOx-a with exceptional methane combustion activity and durability, with stable performance exceeding 200 h even under high‑humidity conditions. This work underscores the pivotal role of configurational entropy in designing amorphous HEOs and expands their potential for advanced thermocatalytic applications.
PMID:
42412391
Bibliographic data and abstract were imported from PubMed on 07 Jul 2026.
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