FU Ming-kai,WU Xuan,YU Dan-feng,WU Zheng-long.Composition-driven Intelligent Prediction of XPS O 1s Binding Energy and Chemical Shift in Inorganic Materials[J].Journal of Instrumental Analysis,2026,45(10):2162-2170.
FU Ming-kai,WU Xuan,YU Dan-feng,WU Zheng-long.Composition-driven Intelligent Prediction of XPS O 1s Binding Energy and Chemical Shift in Inorganic Materials[J].Journal of Instrumental Analysis,2026,45(10):2162-2170.DOI: 10.12452/j.fxcsxb.26061008.
Composition-driven Intelligent Prediction of XPS O 1s Binding Energy and Chemical Shift in Inorganic Materials
The O 1s XPS binding energy is a key indicator for identifying oxygen chemical environments in inorganic materials with broad applications in energy materials,catalysis,and synthesis monitoring. However,the cross-system peak assignment relies heavily on extensive validation experiments. In this study,we developed a composition-driven machine learning framework based on O 1s binding energy data from 514 oxygen-containing inorganic compounds. This framework exclusively uses chemical formula inputs for low-cost pre-experimental peak-position estimation and trend assessment. Using the original compositional descriptors,the Gradient Boosting model achieved a test MAE of 0.505 eV. After introducing physically inspired descriptors,including the cation field strength and transition metal fraction,the MAE decreased to 0.481 eV and
R
2
increased to 0.71
6. The mean cation radius was identified as a key variable,a finding further supported by the XPS measurements of Ca
14
Mg
5
M
4
O
25
(M=Al,Sc,Y). For the paired salt/oxide systems,the model predicted the relative chemical shifts with an MAE of 0.339 eV and a
R
2
of 0.822. This method provides a low-cost and interpretable auxiliary reference for XPS analysis of complex oxygen-containing inorganic materials.
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