计算高通量选高性能过渡金属C8N8单原子电催化剂用于氧降解反应
Keyuan Chen1,2, Xingkao Zhang1, Yongzhi Wu1
1Faculty of Materials Science and Engineering, Kunming University of Science and Technology, Kunming, 650093, China. JRong_@163.com.
Physical chemistry chemical physics : PCCP
|May 29, 2025
概括
嵌入过渡金属的新型二维C8N8材料显示出氧降解反应 (ORR) 的前景. 基于铁 (Fe) 和 (Mn) 的C8N8催化剂表现出卓越的稳定性和活性,Fe-C8N8实现了较低的超电位.
科学领域:
- 材料科学 材料科学 材料科学
- 电化学 电化学 电化学
- 催化剂是一种催化剂.
背景情况:
- 具有活性位点的二维 (2D) 材料正在成为氧降解反应 (ORR) 催化的替代品.
- C8N8是一种新的二维材料,通过将过渡金属 (TM) 纳入TM-N4子单元,提供高孔隙性和可调节结构,这表明有显著的ORR潜力.
研究的目的:
- 系统地研究各种过渡金属嵌入C8N8 (TM-C8N8)单层的ORR催化活性.
- 探索TM-C8N8材料在氧降解反应中的相互作用和催化机制.
- 为有效ORR催化确定最佳的TM-C8N8候选物.
主要方法:
- 使用了密度函数理论 (DFT) 和高通量选的组合.
- 对38种不同的TM-C8N8单层配置进行了系统的调查.
- 分析的重点是d频段中心修饰和TM-C8N8中间相互作用强度.
主要成果:
- 该研究发现,d波段中心修改对于防止ORR期间过度中间吸附至关重要.
- TM-C8N8与反应中间体之间的相互作用强度决定了催化活性.
- Fe-C8N8和Mn-C8N8被确定为最有前途的候选物,表现出卓越的热力学和电化学稳定性.
结论:
- 铁-C8N8表现出了显著的ORR性能,其超电位仅为0.26V.
- 这项研究为设计基于TM-C8N8材料的高效ORR电催化剂提供了指导.
- 该研究阐明了TM-C8N8系统中的反应机制,为进一步开发铺平了道路.
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