Chem. J. Chinese Universities ›› 2015, Vol. 36 ›› Issue (8): 1570.doi: 10.7503/cjcu20150135

• Physical Chemistry • Previous Articles     Next Articles

Benchmark Studies of Density Functional Theory on the Hydrogen Adsorption

SUN Xiaoli1, HUO Ruiping1, BU Yuxiang2, LI Jilai1,*()   

  1. 1. Institute of Theoretical Chemistry, Jilin University, Changchun 130023, China
    2. School of Chemistry and Chemical Engineering, Shandong University, Jinan 250100, China
  • Received:2015-02-06 Online:2015-08-10 Published:2015-07-17
  • Contact: LI Jilai E-mail:jilai@jlu.edu.cn
  • Supported by:
    † Supported by the National Basic Research Program of China(No.2012CB932800), the National Natural Science Foundation of China(Nos.21103064, 21473070) and Postdoctral Daily Expense of China

Abstract:

A benchmark study of density functional theory(DFT) method was conducted on the adsorption energy of hydrogen. The effects of DFT methods, dispersion and the size of basis sets were explored on the prediction of adsorption energy. The results show that the adsorption energies predicted by different DFT methods varies considerably; the dispersion term can not be ignored; the basis set and model have minor contributions for the final energy refinement; larger models are more independent on the size of basis set, and larger basis set can make up the deficiency of smaller model. The method selection strategy will provide valuable clues for relevant studies.

Key words: Binding energy, Adsorption energy, Density functional theory, Benchmark

CLC Number: 

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