Highly electron-deficient ultrathin Co nanosheets supported on mesoporous Cr₂O₃ for catalytic hydrogen evolution from ammonia borane

Abstract

The hydrolysis of ammonia borane (NH3BH3) on metal-based heterogeneous catalyst under light irradiation has been considered as an efficient technology for hydrogen (H2) generation, in which the activity of catalyst...

Hydrophilic amorphous Cr2O3 supported Co species toward efficient hydrogen production from ammonia borane under visible light irradiation

“…Secondly, the electron-deficiency degree of Co nanosheets is improved under visible irradiation, resulting in greatly decreased H 2 O activation and dissociation energy barrier. 29 Thirdly, the increased NH 3 BH 3 hydrolysis rate over Co/Cr 2 O 3 -E-0.5 under visible irradiation further conform the effect of Cr 2 O 3 on activity of catalyst. Notably, the activity of Co/Cr 2 O 3 -E-0.5 with TOF 95.7 min −1 is lower than Co/Cr 2 O 3 -F-0.5.…”

“…Importantly, electron-deficient Co species can decrease H 2 O activation and dissociation energy barriers (rate-determining step in NH 3 BH 3 hydrolysis) and then accelerate the rate of reaction. 29 To date, the design of catalyst has mainly focused on tuning electronic structures of active metal, while neglects catalyst wettability. The appropriate wettability of a catalyst can significantly enhance the adsorption and transfer of reactants, resulting in enhancement activity.…”