在Ru-N-C单原子催化剂上,旋转主导的氧激活和减少机制
Zixian Zhao1,2,3, Mingyuan Yu1,2,3, Erjun Kan1,2,3
1School of Physics, Nanjing University of Science and Technology, Nanjing 210094, Jiangsu Province, China. czhan@njust.edu.cn.
Physical chemistry chemical physics : PCCP
|November 10, 2025
概括
旋转状态显著影响--碳 (Ru-N-C) 单原子催化剂中的氧降解反应 (ORR). 了解旋转交叉效应对于优化ORR性能和探索新的电催化剂机制至关重要.
科学领域:
- 电化学 电化学 电化学
- 材料科学 材料科学 材料科学
- 催化剂是一种催化剂.
背景情况:
- 单原子M-N-C催化剂 (SAC) 对氧降解反应 (ORR) 有望.
- 对于基于Fe/Co/Ni的M-N-C催化剂,旋转状态至关重要,但在其他家族中研究较少.
- 由于忽视了旋转效应,ORR机制在M-N-C SAC中没有得到充分的探索.
研究的目的:
- 研究Ru-N4-C SACs的ORR机制,考虑各种自旋状态.
- 阐明旋转状态演变对O2激活和ORR动力学的影响.
- 为基于Ru的电催化剂的旋转相关机制提供基本见解.
主要方法:
- 使用第一原则计算来模拟ORR机制.
- 在不同潜力和连接体环境下对自旋状态演化的分析.
- 确定控制ORR动力学的活性位点和中间体.
主要成果:
- 旋转状态演变是由潜在和连接体变化协同控制的,突出显示了旋转交叉效应.
- 氧2激活机制被中心的旋转状态显著改变.
- 确定了三种活性部分 (RuNIS4,RuNLS4*OH,RuNIS4*O),它们有助于0.6V与SHE的半波电位.
结论:
- 旋转状态在Ru-N-C SAC的ORR机制中起着关键作用.
- 旋转交叉是影响ORR活动和动力学的重要因素.
- 这项研究为ORR设计自旋优化的基于Ru的电催化剂提供了基本的见解.
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