通过原子级载体预设计为增强光催化进化进行轨道定制的Pt站点
Xinghao Zhang1, Xiaomeng Guo2, Huiye Jiao1
1School of Materials Science and Engineering, Nankai University, Tianjin 300350, P. R. China.
ACS nano
|November 4, 2025
概括
研究人员精确控制了单原子 (SA) 协调几何,揭示了进化的结构和光催化活性之间的火山类型关系. 这指导了先进的SA催化剂的设计.
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.
- 纳米技术 纳米技术
背景情况:
- 单原子 (SA) 催化剂提供高效率,但受到协调几何学的限制.
- 精确控制SA协调是优化催化性能的关键.
- 发展结构-活动关系对于设计先进的SA催化剂至关重要.
研究的目的:
- 建立白金 (Pt) 单原子协调几何和催化活性之间的明确关系.
- 为了指导针对性,高活性SA催化剂的合成.
- 为SA航母提出一个原子级预设计战略.
主要方法:
- 合成七个不同的SA载体,控制和氧协调位点.
- 控制四个 Pt 协调几何体的合成:Pt-N4,Pt-N2,Pt-N3O.
- 使用现场KPFM-SPV,X射线光电子光谱学,秒短暂吸收和DFT计算进行了表征.
主要成果:
- 与N3O位点 (Od-CN-Pt) 协调的Pt单个原子表现出异常的光催化进化 (66.4 mmol g-1 h-1).
- 性能明显高于Pt-N4 (CN-Pt) 和Pt-N2 (Nv-CN-Pt) 催化剂.
- 建立了一种火山类型的关系模型,将活动与贝德电荷,Pt 5d强度和 ΔE.联系起来.
结论:
- 协调几何学极大地影响了单原子催化剂的催化活性.
- 已建立的描述器模型指导高性能SA催化剂的预设计.
- 这项工作为针对特定应用的SA载体的原子级预设计提供了战略.
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