Abstract
A safe hydrogen storage method that does not entail high-temperature reactions, high pressures, and explosion risks is required urgently. Herein, we present a polymeric hydrogen carrier bearing 2,3-diphenylquinoxaline as a hydrogen storage unit. The introduction of phenyl group into a heterocyclic nitrogen compound led to rapid dehydrogenation. The radical polymerization of 6-vinyl-2,3-diphenylquinoxline produced poly(6-vinyl-2,3-diphenylquinoxline) with a high molecular weight of ~ 105. The hydrogenation of poly(6-vinyl-2,3-diphenylquinoxline) by a borane–tetrahydrofuran complex resulted in poly(6-vinyl-2,3-diphenyl-1,2,3,4-tetrahydroquinoxaline). The reversible hydrogenation/dehydrogenation of these newly synthesized polymers was demonstrated with full conversion under mild conditions (~ 1 atm and < 200°C).
Graphical abstract
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Acknowledgments
This work was partially supported by Grants-in-Aids for Scientific Research (18H05515 and 21H04695) and by the Top Global University Project from MEXT, Japan.
Funding
This study was partially funded by Grants-in-Aids for Scientific Research (18H05515 and 21H04695) and by the Top Global University Project from MEXT, Japan.
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Oka, K., Kataoka, M., Nishide, H. et al. Poly(vinyl diphenylquinoxaline) as a hydrogen storage material toward rapid hydrogen evolution. MRS Communications 12, 213–216 (2022). https://doi.org/10.1557/s43579-022-00164-x
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DOI: https://doi.org/10.1557/s43579-022-00164-x