Luo Jun, Li Xu, Ye Yongjie, Zhou Tao, Wu Wenlong, Li Hongliang, Yang Qing, Yan Han, Zeng Jie
Hefei National Research Center for Physical Sciences at the Microscale, Key Laboratory of Strongly-Coupled Quantum Matter Physics of Chinese Academy of Sciences, Key Laboratory of Surface and Interface Chemistry and Energy Catalysis of Anhui Higher Education Institutes, Department of Chemical Physics, University of Science and Technology of China, Hefei, Anhui, 230026, P. R. China.
Department of Chemistry, University of Science and Technology of China, Hefei, Anhui, 230026, P. R. China.
Angew Chem Int Ed Engl. 2025 Feb 10;64(7):e202419093. doi: 10.1002/anie.202419093. Epub 2024 Nov 19.
High-entropy alloys (HEAs) have emerged as burgeoning heterogeneous catalysts due to their vast material space, unique structure, and superior stability. However, the dominant trial-and-error approaches hamper the exploration of efficient catalysts, necessitating the development of rational design strategies. Here, we report a progressive approach to the design and fabrication of HEA catalysts guided by alloying effects toward propane dehydrogenation. Cu, Sn, Au, and Pd are selected and demonstrated to induce dilution, encapsulation, surface enrichment, and inhomogeneity effects on Pt. The fabricated HEA, PtCuSnAuPd/SiO, exhibits excellent activity, selectivity, and stability. The propylene formation rates reach 256 and 390 mol g h at 550 and 600 °C, respectively. Systematic characterizations reveal that the random elemental mixing, structural stability, and high Pt exposure promote the exposure of abundant stable isolated Pt sites. This work comprehensively explores the rational design and fabrication of HEA catalysts from a unique perspective, offering opportunities for developing advanced catalysts.
高熵合金（HEAs）因其广阔的材料空间、独特的结构和卓越的稳定性，已成为新兴的多相催化剂。然而，占主导地位的试错方法阻碍了高效催化剂的探索，因此需要开发合理的设计策略。在此，我们报告一种渐进的方法，用于在合金化效应指导下设计和制备用于丙烷脱氢的高熵合金催化剂。选择了铜、锡、金和钯，并证明它们对铂会产生稀释、包封、表面富集和不均匀性效应。制备的高熵合金PtCuSnAuPd/SiO表现出优异的活性、选择性和稳定性。在550和600°C下，丙烯生成速率分别达到256和390 mol g h。系统表征表明，随机元素混合、结构稳定性和高铂暴露促进了大量稳定孤立铂位点的暴露。这项工作从独特的角度全面探索了高熵合金催化剂的合理设计和制备，为开发先进催化剂提供了机会。
