在Cu100) /H2O接口的电化学CO降低的顺序电子-质子转移动力学解决,通过量子经典框架
1College of Chemistry and Chemical Engineering, Xiamen University Xiamen China gfu@xmu.edu.cn +86-592-2183047 +86 13625012808.
Chemical science
|February 9, 2026
概括
本研究介绍了一种量子经典框架,用于模拟二氧化碳减排中的电子转移 (ET) 和质子转移 (PT). 研究结果显示,顺序的ET-PT路径比协同的质子-电子合 (PCET) 更有效.
科学领域:
- 计算化学和材料科学计算化学和材料科学
- 电催化和能量转换的电催化.
- 量子力学和分子动力学
背景情况:
- 电子转移 (ET) 和质子转移 (PT) 对电催化非常重要,但由于复杂的相互作用,理论上很难建模.
- 了解这些动态是提高能源转化和化学合成效率的关键.
- 现有的模型很难统一ET/PT过程中的电子,核和溶剂效应.
研究的目的:
- 开发和应用一个量子经典的多尺度框架来研究ET和PT动态.
- 阐明明水中的Cu{100}减少二氧化碳的机制,重点关注ET和PT的相互作用.
- 为设计更高效的电催化剂提供理论基础.
主要方法:
- 限制密度函数理论 (CDFT) 与机器学习加速分子动力学 (MLMD) 的整合.
- 训练不同的ML潜力,用于adiabatic和diabatic状态,以实现高效的采样和保持量子真实性.
- 应用糖尿病自由能量表面计算和振动质子合电子转移 (PCET) 理论.
主要成果:
- 二氧化碳的减少通过连续的内部球ET进行,形成CO2-,其次是PT形成COOH.
- 溶剂重组动态约束ET,但通过离子双极相互作用稳定CO2-中间体.
- 溶剂放松动态调整距离,增强振动合,并促进非adiabatic PT.
- 序列ET-PT路径显著更快 (大小的5个数量级),而不是在零电荷潜力 (PZC) 的协同PCET.
结论:
- 开发的量子经典框架为分析电化学接口的ET/PT动力学提供了强大的方法.
- 这项研究突出了量子核效应,振动合和电催化中的溶剂动态之间的关键相互作用.
- 结果为优化二氧化碳减排途径提供了洞察力,以提高能源转换效率.
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