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表面状态激活驱动电荷分离通过Z方案Fe₂O₃/CuO异质连接用于光催化H₂进化

Ke Ma¹, Jingying Wei¹, Chun Gou¹

¹School of Chemistry and Chemical Engineering, Yangzhou University, 180 Siwangting Road, Yangzhou 225002, People's Republic of China. jiangtengfei@yzu.edu.cn.

Physical chemistry chemical physics : PCCP

|September 1, 2025

概括

这项研究使用补充剂在Fe2O3/CuO异质连接中重新激活表面状态,以获得高效的光催化生产. 工程界面创造了电子储备, 显著提高了的进化速度.

科学领域:

材料科学
光催化
表面化学

背景情况:

表面状态对于光催化是至关重要的,但也可能导致重组.
界面上的缓慢动力学可以将表面状态转化为重组中心.
优化表面状态是提高光催化效率的关键.

研究的目的:

在Fe2O3/CuO异质连接中设计Ni介导的表面状态,以改善光催化的产生.
调查Z模式电荷转移在重新激活表面状态中的作用.
在工程界面上阐明电子积累的机制.

主要方法:

用Ni合制造Fe2O3/CuO异质连接.
用于电子结构分析的密度功能理论 (DFT) 计算.
表面光伏 (SPV) 光谱和时间解析的SPV衰变动力学.

主要成果:

异质原子在CuO导电带最小附近进入表面状态,作为电子陷.
工程表面状态形成一个界面电子储库,空间分离电荷载体.
载体寿命延长了5倍至4. 72毫秒,增加了1933. 69μmolg-1h-1的光催化H2演变.
这种材料在4个循环中保持了98%的活性.

结论:

当通过Z模式的电荷转移进行设计时,可以有效地防止载体重组.
接口电子储存机制显著增加了光催化的产生.
这项工作为设计具有动态电子积累能力的先进光催化接口提供了一种新策略.

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