Machine learning hydrogen adsorption on nanoclusters through structural descriptors

Tutkimustuotos: Lehtiartikkelivertaisarvioitu

Tutkijat

Organisaatiot

  • Nanolayers Research Computing Ltd
  • Kanazawa University
  • Graduate School Materials Science in Mainz

Kuvaus

Catalytic activity of the hydrogen evolution reaction on nanoclusters depends on diverse adsorption site structures. Machine learning reduces the cost for modelling those sites with the aid of descriptors. We analysed the performance of state-of-the-art structural descriptors Smooth Overlap of Atomic Positions, Many-Body Tensor Representation and Atom-Centered Symmetry Functions while predicting the hydrogen adsorption (free) energy on the surface of nanoclusters. The 2D-material molybdenum disulphide and the alloy copper–gold functioned as test systems. Potential energy scans of hydrogen on the cluster surfaces were conducted to compare the accuracy of the descriptors in kernel ridge regression. By having recourse to data sets of 91 molybdenum disulphide clusters and 24 copper–gold clusters, we found that the mean absolute error could be reduced by machine learning on different clusters simultaneously rather than separately. The adsorption energy was explained by the local descriptor Smooth Overlap of Atomic Positions, combining it with the global descriptor Many-Body Tensor Representation did not improve the overall accuracy. We concluded that fitting of potential energy surfaces could be reduced significantly by merging data from different nanoclusters.

Yksityiskohdat

AlkuperäiskieliEnglanti
Artikkeli37
Sivut1-8
Julkaisunpj Computational Materials
Vuosikerta4
Numero1
TilaJulkaistu - 1 joulukuuta 2018
OKM-julkaisutyyppiA1 Julkaistu artikkeli, soviteltu

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