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了解在银纳米集群中单原子兴奋剂对通过单个实体电化学减少氧气的位置效应

Zehui Sun¹, Cheng Chen², Mengdan Wei¹

¹School of Chemistry and Molecular Engineering, Key Laboratory for Advanced Materials and Joint International Research Laboratory of Precision Chemistry and Molecular Engineering, Feringa Nobel Prize Scientist Joint Research Center, Frontiers Science Center for Materiobiology and Dynamic Chemistry, East China University of Science and Technology, 130 Meilong Road, Shanghai, 200237, P.R. China.

Angewandte Chemie (International ed. in English)

|April 30, 2025

概括

合金纳米集群与单个原子增强了催化. 这项研究揭示了双金属纳米集群中的多原子位置如何影响单个原子水平的氧降解反应活性.

科学领域:

纳米材料科学科学纳米材料科学
催化剂是一种催化剂.
电化学电化学电化学

背景情况:

使用单原子兴奋剂合金纳米集群 (NCs) 通过协同相互作用提高了催化性能.
了解原子层次的NC中剂的精确位置效应至关重要,但具有挑战性.

研究的目的:

为了研究单个单原子合双金属M1Ag24 (M = Ag,Au,Pt,Cu) 纳米集群的氧降解反应 (ORR) 的电催化行为.
为了阐明单原子剂在单原子分辨率下对ORR活动的位置效应.
揭示这些纳米集群内的动态合金过程和反应机制.

主要方法:

利用单个实体碰撞电化学来进行高分辨率,高通量电化学测量.
研究的单个单原子合双金属M1Ag24 (M = Ag,Au,Pt,Cu) 纳米集群.
将实验发现与理论计算结合起来.

主要成果:

成功地区分了不同单原子兴奋剂 (Ag,Au,Pt,Cu) 对M1Ag24NC单原子水平的ORR活性的影响.
确定了M1Ag24NCs的独特电催化种群.
在Au1Ag24NCs的动态合金过程中揭示了Au单原子的集群内迁移,阐明了反应动态.

结论:

展示了一种新的方法,用于在现场识别外来兴奋剂原子位置对合金NC单个原子水平上的电催化活性的影响.
这些发现为用于催化的单原子合金纳米集群的结构-活性关系提供了基本的见解.

关键词:

合金纳米集群合金纳米集群集群内部迁移的迁移一个原子的兴奋剂.位置效应位置效应单一实体电化学单一实体电化学

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