Ultrafine metal nanoparticles isolated on oxide nano-islands as exceptional sintering-resistant catalysts

IF 37.2 1区材料科学 Q1 CHEMISTRY, PHYSICAL

Nature Materials Pub Date : 2025-03-10 DOI:10.1038/s41563-025-02134-9

Tao Zhou, Xu Li, Jiankang Zhao, Lei Luo, Yanru Wang, Zizhen Xiao, Sunpei Hu, Ruyang Wang, Zekun Zhao, Chengyuan Liu, Wenlong Wu, Hongliang Li, Zhirong Zhang, Long Zhao, Han Yan, Jie Zeng

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引用次数: 0

Abstract

Ultrafine nanoparticles (NPs) have attracted extensive research interest, especially in heterogeneous catalysis. However, the inherent sintering propensity of NPs has been a major obstacle to their catalytic stability. Here we report an isolation strategy to preserve highly dispersed ultrafine NPs under extremely harsh conditions. Oxide nano-islands were grafted between the catalyst support and metal NPs, serving as a general approach by following a charge attraction principle. Specifically, LaO_x nano-islands were ideally suited for stabilizing Ru NPs among the synthetic library, exhibiting strong adhesion to minimize the chemical potential and disconnect the sintering path. Thus, ultrafine Ru NPs in Ru/LaO_x–SiO₂ were isolated, maintaining a mean size of 1.4 nm in CO- and H₂-rich atmosphere during efficient catalysis for methane dry reforming at 800 °C for 400 h. This isolation strategy has proved effective for many other metals on various supports, paving a practical way for the design of sintering-resistant catalysts.

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在氧化物纳米岛上分离的超细金属纳米颗粒作为优异的抗烧结催化剂

超细纳米颗粒（NPs）在多相催化方面引起了广泛的研究兴趣。然而，NPs固有的烧结倾向一直是其催化稳定性的主要障碍。在这里，我们报告了一种在极端恶劣条件下保存高度分散的超细NPs的隔离策略。氧化物纳米岛接枝在催化剂载体和金属NPs之间，作为遵循电荷吸引原理的一般方法。具体来说，LaOx纳米岛非常适合稳定合成库中的Ru NPs，具有很强的附着力，可以最小化化学势并断开烧结路径。因此，在Ru/ LaOx-SiO2中分离出了超细Ru NPs，在富CO-和h2的气氛中，在800℃下高效催化甲烷干重整400 h，其平均尺寸保持在1.4 nm。这种隔离策略已被证明对许多其他金属在各种载体上的隔离是有效的，为设计抗烧结催化剂铺平了实用的道路。

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来源期刊

Nature Materials 工程技术-材料科学：综合

CiteScore

62.20

自引率

0.70%

发文量

221

审稿时长

3.2 months

期刊介绍： Nature Materials is a monthly multi-disciplinary journal aimed at bringing together cutting-edge research across the entire spectrum of materials science and engineering. It covers all applied and fundamental aspects of the synthesis/processing, structure/composition, properties, and performance of materials. The journal recognizes that materials research has an increasing impact on classical disciplines such as physics, chemistry, and biology. Additionally, Nature Materials provides a forum for the development of a common identity among materials scientists and encourages interdisciplinary collaboration. It takes an integrated and balanced approach to all areas of materials research, fostering the exchange of ideas between scientists involved in different disciplines. Nature Materials is an invaluable resource for scientists in academia and industry who are active in discovering and developing materials and materials-related concepts. It offers engaging and informative papers of exceptional significance and quality, with the aim of influencing the development of society in the future.