催化作用
星团(航天器)
Atom(片上系统)
材料科学
锰
动力学
氧还原反应
氧原子
纳米技术
化学工程
化学
物理化学
分子
电化学
物理
冶金
电极
有机化学
嵌入式系统
工程类
量子力学
程序设计语言
计算机科学
作者
Yayin Li,Zihan Li,Kefan Shi,Lanke Luo,Haomin Jiang,Ye He,Youjian Zhao,Jiayue He,Lin Liu,Zemin Sun,Genban Sun
出处
期刊:Small
[Wiley]
日期:2023-12-19
被引量:1
标识
DOI:10.1002/smll.202309727
摘要
Abstract Integrating single atoms and clusters into one system represents a novel strategy for achieving the desired catalytic performance. In comparison to single‐atom catalysts, catalysts combining single atoms and clusters harness the advantages of both, thus displaying greater potential. Nevertheless, constructing single‐atom‐cluster systems remains challenging, and the fundamental mechanism for enhancing catalytic activity remains elusive. In this study, a directly confined preparation of a 3D hollow sea urchin‐like carbon structure (Mn SA /Mn AC ‐SSCNR) is developed. Mn single atoms synergistically interact with Mn clusters, optimizing and reducing energy barriers in the reaction pathway, thus enhancing reaction kinetics. Consequently, in contrast to Mn single‐atom catalysts (Mn SA ‐SSCNR), Mn SA /Mn AC ‐SSCNR exhibits significantly improved oxygen reduction activity, with a half‐wave potential ( E 1/2 ) of 0.90 V in 0.1 m KOH, surpassing that of Mn SA ‐SSCNR and Pt/C. This work demonstrates a strategy of remote synergy between heterogeneous single atoms and clusters, which not only contributes to electrocatalytic reactions but also holds potential for reactions involving more complex products.
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