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对于超快速N₂固定的直接Z方案通道的光驱陷工程

Cun-Biao Lin¹, De-Bo Lin¹, Wen-Xian Chen¹

¹H-PSI Computational Chemistry Lab, Institute of Industrial Catalysis, State Key Laboratory Breeding Base of Green-Chemical Synthesis Technology, College of Chemical Engineering, Zhejiang University of Technology, Hangzhou 310032, P.R. China.

The journal of physical chemistry letters

|December 8, 2025

概括

在C7N6/MoSe2异质连接处的缺陷工程创建了浅陷状态. 这些状态加速重组,在环境条件下提高光催化固定效率.

科学领域:

材料科学材料科学材料科学
计算化学计算化学
催化剂是一种催化剂.

背景情况:

有效的光催化固定对于可持续的氨生产至关重要.
了解异质连接中的电荷载体动力学是优化光催化剂性能的关键.
缺陷工程提供了一个有前途的途径来调整材料的电子特性.

研究的目的:

调查Se空位和B原子兴奋剂在光催化N2固定的C7N6/MoSe2异质连接中的作用.
阐明电荷载体运输,再组合和N2激活的机制.
在环境条件下提高氨的选择性和效率.

主要方法:

密度功能理论 (DFT) 与非adiabatic分子动力学 (NAMD) 相结合.
实时时间依赖的DFT (RT-TDDFT) 用于分析载波动态.
用缺陷策略对异质连接的计算建模.

主要成果:

由Se空位和B兴奋剂引起的浅电荷陷状态调节载体运输和速度.
快速捕获释放机制加速了层间重组,缩短了载体的寿命.
光生成的电子在55 fs内激活N2,由补充剂促进.
实现了0.23V的低限制电位,并提高了NH3的选择性.

结论:

在C7N6/MoSe2 Z模式异质连接中,缺陷工程有效调节电荷迁移和重组.
浅陷状态增强载体氧化还原能力,这对于高效的光催化N2固定至关重要.
这项研究为设计用于固的环境光催化剂提供了新的视角.

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