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通过纳米粒子使单原子催化剂失活

Alexey S Galushko¹, Valentine P Ananikov¹

¹Zelinsky Institute of Organic Chemistry, Russian Academy of Sciences, Moscow, 119991, Russia.

Angewandte Chemie (International ed. in English)

|December 16, 2025

概括

单原子催化剂 (SAC) 可以通过形成纳米颗粒 (NP) 去活化,这些纳米颗粒会毒害活性位点. 防止这种聚合的策略对于稳定和选择性催化是至关重要的.

科学领域:

催化剂是一种催化剂.
材料科学材料科学材料科学
纳米技术纳米技术

背景情况:

由于孤立的金属中心,单原子催化剂 (SAC) 提供高原子效率和精确的催化活性.
然而,在反应条件下,SACs是动态的,这挑战了它们的稳定性.

研究的目的:

挑战SACs和纳米粒子 (NP) 作为不同的系统的观点.
提出NP可以通过捕获活性原子来作为SAC的催化毒剂.
突出SAC的动态演变及其聚合到NP作为一个关键的限制.

主要方法:

审查机械学研究,热力学数据和实验观测.
分析各种反应类:化,氧化和交叉合.

主要成果:

SACs可以聚合到NP中,导致活动和选择性丧失.
这种转换代表着一个重要的停用途径,而不仅仅是一个侧面过程.
通过捕获活跃的单金属原子,NP可能会毒害SAC.

结论:

SAC-NP关系是一个动态连续,而不是二分法.
稳定孤立的活性位点对于下一代催化剂至关重要.
抑制NP形成的策略对于催化剂的稳定性和效用至关重要.

关键词:

现场捕获活动现场捕获活动催化剂的动态催化剂的动态催化剂中毒催化剂中毒金属聚合物的金属聚合物.纳米粒子失活的方法在 SAC 稳定性.一个原子的催化剂.

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Catalysis

Catalysis

The presence of a catalyst affects the rate of a chemical reaction. A catalyst is a substance that can increase the reaction rate without being consumed during the process. A basic comprehension of a catalysts’ role during chemical reactions can be understood from the concept of reaction mechanisms and energy diagrams.