arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 2107.02599cond-mat.mtrl-sciphysics.chem-ph
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一种从纯金属到合金吸附能预测的可移植机器学习方案

A Transferable Machine-learning Scheme from Pure Metals to Alloys in Predicting Adsorption Energies

Xin Li, Bo Li, Zhiwen Chen, Wang Gao, Qing Jiang

摘要:

合金由于其组成、结构和元素分布的可调性,在催化领域具有巨大的应用潜力,但同时也限制了潜在合金催化剂的快速筛选。机器学习方法能够解决多变量问题,但由于缺乏通用描述符,仍然无法从纯金属的性质预测复杂合金催化剂。在此,我们提出了一个可转移的机器学习模型的基础上的基板和吸附物的固有属性,它可以预测单原子合金(SAA),AB金属间化合物(ABs)和高熵合金(HEAs)的吸附能,简单地通过训练过渡金属(TM)的属性。此外,该模型还从机器学习的角度建立了合金表面吸附能的构效关系,揭示了表面原子的价态、电负性和配位性以及吸附物的价态对吸附能的影响。这种可转移的方案促进了对合金吸附机理的理解和合金催化剂的快速设计。

英文摘要:

Alloys present the great potential in catalysis because of their adjustable compositions, structures and element distributions, which unfortunately also limit the fast screening of the potential alloy catalysts. Machine learning methods are able to tackle the multi-variable issues but still cannot yet predict the complex alloy catalysts from the properties of pure metals due to the lack of universal descriptors. Herein we propose a transferable machine-learning model based on the intrinsic properties of substrates and adsorbates, which can predict the adsorption energies of single-atom alloys (SAAs), AB intermetallics (ABs) and high-entropy alloys (HEAs), simply by training the properties of transition metals (TMs). Furthermore, this model builds the structure-activity relationship of the adsorption energies on alloys from the perspective of machine learning, which reveals the role of the surface atoms' valence, electronegativity and coordination and the adsorbates' valence in determining the adsorption energies. This transferable scheme advances the understanding of the adsorption mechanism on alloys and the rapid design of alloy catalysts.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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