为了更好的催化剂,打破对称性:对单原子催化剂设计的洞察
Pingping Cao1, Xueqin Mu1, Fanjiao Chen1
1School of Chemistry and Molecular Engineering, Nanjing Tech University, Nanjing 211816, China. liusl@njtech.edu.cn.
Chemical Society reviews
|March 13, 2025
概括
在单原子催化剂 (SAC) 中打破结构对称性可以通过优化电子结构来提高电催化性能. 本综述探讨了破对称的原子级策略,以提高催化剂的选择性和活性.
科学领域:
- 材料科学 材料科学 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:
- 具有对称的M-N4配置的传统单原子催化剂 (SAC) 显示出低于最佳的电子性能.
- 在SAC中对称的电子密度限制了反应中间体的吸附和激活,阻碍了催化效率.
研究的目的:
- 审查用于微调催化剂电子结构的原子级对称性破坏策略.
- 探索SAC中的调制电子分布如何提高关键中间体的选择性和吸附强度.
- 要突出对称性破坏对氧化,还原和双功能反应中的电催化性能的影响.
主要方法:
- 专注于原子层次的对称性破坏策略:电荷,协调和几何破坏.
- 调查M-N4框架的修改,包括不和协调 (M-N_x),非金属兴奋剂 (MX-N_x) 和双金属兴奋剂 (M1M2-N4).
- 利用先进的表征技术和密度函数理论 (DFT) 来分析电子结构和催化机制.
主要成果:
- 对称性破坏调节了在活性中心周围的电子分布,提高了选择性和吸附强度.
- 不和协调,非金属兴奋剂和双金属兴奋剂等策略有效地打破了M-N4对称性.
- 阐明了这些策略对氧化,还原和双功能催化反应的影响.
结论:
- 打破结构对称性是提高SAC电催化性能的一个强有力的策略.
- 精确的原子层控制对称性破坏对于优化催化剂设计至关重要.
- 需要进行进一步的研究,才能充分发挥在催化中破坏对称性策略的潜力.
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