Abstract
The adsorption of H2 molecules on Li, Na and K-decorated MXenes (Ti2C) has been investigated with first-principles calculations. A detailed examination of the adsorption mechanism of the Li, Na and K-decorated systems was presented by charge population analysis, electron density and partial density of states calculations. The results show that Li-decorated Ti2C system was found suitable for hydrogen storage. The maximum storage capacity about 4.33 wt% with a suitable average adsorption energy of − 0.26 eV/H2 can be obtained for two Li atoms, which adsorbed on both sides of the Ti2C. It indicates that Li-decorated Ti2C is of great significance for the wide application of MXenes in the field of hydrogen absorption.
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Acknowledgements
This work was supported by Natural Science Foundation of Jiangsu Province (BK20171442), China Postdoctoral Science Foundation (2018T110480), Open Foundation of State Key Laboratory of Millimeter Waves of Southeast University (K202003), Research Center of Optical Communications Engineering and Technology, Jiangsu Province (ZXF201904), and Postgraduate Research and Practice Innovation Program of Jiangsu Province (SJCX19_0283).
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Zhao, J., Li, W., Feng, Y. et al. Sensing mechanism of hydrogen storage on Li, Na and K-decorated Ti2C. Appl. Phys. A 126, 945 (2020). https://doi.org/10.1007/s00339-020-04123-y
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DOI: https://doi.org/10.1007/s00339-020-04123-y