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在CuWO4 (010) 表面进行热激活水分裂的密度函数理论研究

Xuan Chu¹, Nora H de Leeuw^1,2

¹School of Chemistry, University of Leeds, Leeds LS2 9JT, United Kingdom.

The Journal of chemical physics

|August 26, 2025

概括

铜酸 (CuWO4) 显示了太阳能水分裂的潜力. 在减少的CuWO4表面上引入氧气空缺可以显著提高气的产生,从而推进可持续的能源解决方案.

科学领域:

材料科学
催化剂
可再生能源

背景情况:

太阳能驱动的水分离对于可持续的生产至关重要.
铜酸 (CuWO4) 是光催化应用的一个有前途的材料.
了解表面特性是优化催化效率的关键.

研究的目的:

通过计算研究CuWO4表面上的催化水分裂和生成.
分析原始和减少的CuWO4的反应途径和电子特性.
确定增强进化的机制.

主要方法:

密度函数理论 (DFT) 使用现场库伦和远程分散校正 (DFT+U-D3).
热力学和动力反应概况的分析.
检查中间体和过渡状态的结构和电子特性.

主要成果:

在原始和减少的CuWO4表面上研究了多种反应途径.
确定减少 CuWO4 表面的氧气空缺会产生低协调的 Cu 和 W 原子.
在氧空位点观察到局部过剩的电子,显著增强进化.

结论:

有氧空隙的 CuWO4 表面表现出增强的演化反应 (HER) 活性.
由于氧气空缺而导致的电子结构修改是提高催化性能的关键.
这项研究为设计基于CuWO4的高效光催化剂提供了洞察力.

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