Understanding chemical reactions via variational autoencoder and atomic representations

Šípka, Martin; Erlebach, Andreas; Grajciar, Lukáš

doi:10.48550/arxiv.2203.08097

Cited by 1 publication

(1 citation statement)

References 0 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Due to the narrower error distribution of the NNPs, it is expected that NNP level simulations provide much more consistent and accurate results for the dynamics and (de)protonation of water confined in aluminosilicate zeolites in a protonic form. In addition, our recent tests 39 of the NNP performance for the proton jump barriers in H-CHA zeolites also agree well with the previously calculated 40 barriers.…”

Section: Neural Network Potential Generalization Testsupporting

confidence: 88%

Reactive Neural Network Potential for Aluminosilicate Zeolites and Water: Quantifying the effect of Si/Al ratio on proton solvation and water diffusion in H-FAU

Saha

Erlebach

Nachtigall

et al. 2022

Preprint

View full text Add to dashboard Cite

Acidic zeolites are one of the most important catalysts. In many of their catalytic applications, the mode of interaction with water heavily influences their activity, efficiency, and durability as a catalyst. Despite the recent (first principles) computational efforts to understand the mechanistic underpinning of the water-zeolite interactions, it is still prohibitively expensive to carry out comprehensive studies employing realistic zeolitic models. Therefore, we developed a reactive neural network-based potential for aluminosilicate zeolites in the protonic form including their interaction with the aqueous solution that has a capacity to accelerate simulation by orders of magnitude while retaining the reference level of accuracy. To showcase its potential, we used it to determine how multiple factors (aluminum content, water loading and temperature) influence the proton solvation and water dynamics in one of the industrially most important acidic zeolites, the faujasite (FAU). We found that Si/Al ratio is a significant determinant of the water diffusivity, water capacity to solvate protons in the nanopores, and the zeolite hydrolytic stability. We expect that many of these findings are readily extendable to other acidic zeolites in interaction with water.

show abstract

Section: Neural Network Potential Generalization Testsupporting

confidence: 88%