Improving hydrogen production for carbon-nitride-based materials: crystallinity, cyanimide groups and alkali metals in solution working synergistically

The recent findings on the fundamental understanding of the activity of carbon nitride-based materials in the hydrogen evolution reaction (HER) allow to design rationally the photocatalytic systems with improved activities. Herein, combining highly ordered materials with cyanimide defects and alkali metal cations in the solution, we demonstrated an important synergistic effect which for cyanimide modified K-PHI is revealed in 12 times higher apparent quantum yield (AQY) compared to K-PHI free of surface cyanimide groups.

Automated summary

The recent study reveals the importance of combining highly ordered materials with cyanimide defects and alkali metal cations in designing photocatalytic systems for hydrogen evolution reaction. The synergistic effect of cyanimide modified K-PHI significantly enhances the apparent quantum yield compared to K-PHI without surface cyanimide groups.