Oxygen Vacancy-Rich 2D TiO₂ Nanosheets: A Bridge Toward High Stability and Rapid Hydrogen Storage Kinetics of Nano-Confined MgH₂.

ABSTRACT: MgH₂ has attracted intensive interests as one of the most promising hydrogen storage materials. Nevertheless, the high desorption temperature, sluggish kinetics, and rapid capacity decay hamper its commercial application. Herein, 2D TiO₂ nanosheets with abundant oxygen vacancies are used to fabricate a flower-like MgH₂/TiO₂ heterostructure with enhanced hydrogen storage performances. Particularly, the onset hydrogen desorption temperature of the MgH₂/TiO₂ heterostructure is lowered down to 180 °C (295 °C for blank MgH₂). The initial desorption rate of MgH₂/TiO₂ reaches 2.116 wt% min^-1 at 300 °C, 35 times of the blank MgH₂ under the same conditions. Moreover, the capacity

SUBMITTER: Ren L 

PROVIDER: S-EPMC9287516 | biostudies-literature | 2022 Jul

REPOSITORIES: biostudies-literature