AI 中文总结
研究H₂在Cu(111)表面解离化学吸附问题，测试范围分离的混合范德华密度泛函描述其动力学经典势垒的能力，利用分子准粒子预测变体，提出并实现识别AHBR(γ*)版本用于建模，接近化学精度确定势垒高度，检验相关物理的更广泛相关性。
AI 中文摘要
H₂在Cu(111)表面的解离化学吸附（DC）是理解多相催化原理的典型问题。挑战在于对反应动力学建模，这反映了原子变形、摩擦和非弹性散射的经典势。本文测试了一组范围分离的混合（RSH）范德华密度泛函（vdW-DFs）描述H₂+Cu(111) DC问题中动力学经典势垒的能力。还记录了一种用于快速准确预测分子准粒子（QPs）的变体的使用情况，在一组催化中常研究的小分子上表现出色。最后，提出并实现了一种利用QP焦点来识别最佳非经验（但特定于吸附质）的RSH vdW-DF版本AHBR(γ*)用于H₂ DC建模的方法，平衡了分子和金属方面部分冲突的要求。发现AHBR(γ*)能以接近化学精度确定经典的H₂+Cu(111) DC势垒高度。表明DC建模可检验这些RSH vdW-DFs背后物理的更广泛相关性。
英文摘要
Dissociative chemisorption (DC) of H$_2$ on the Cu(111) surface is a prototypical problem for understanding elements of heterogeneous catalysis [Science 326, 832 (2009)]. The challenge lies in modeling the reaction dynamics that in turn reflects a classical potential for atomic deformations, friction, and inelastic scattering. Here, I test the use of a set of range-separated hybrid (RSH) van der Waals density functionals (vdW-DFs) [JPCM 37, 211501 (2025)] on their ability to describe the classical barrier for dynamics in this H$_2$+Cu(111) DC problem. I furthermore document use of a variant for fast accurate predictions of the molecular quasi-particles (QPs), finding excellent performance across a set of small molecules that are often studied in catalysis. Finally, I suggest and implement a way to use that QP focus to identify what I consider a best-possible non-empirical (yet adsorbate specific) RSH vdW-DF version, denoted AHBR($γ^*$) for H$_2$ DC modeling, navigating what are partly conflicting requirements on the molecule and metal sides. I find that the AHBR($γ^*$) can determine the classical H$_2$+Cu(111) DC barrier height close to chemical accuracy. I suggest that DC modeling can test broader relevance of the physics underpinning these RSH vdW-DFs.
Comments20 pages, 4 figures, 7 tables
