Graphdiyne@Janus Magnetite for Photocatalytic Nitrogen Fixation

A highly active graphdiyne heterojunction with highly efficient photocatalysis is designed and fabricated. This catalyst demonstrates transformative properties on photocatalysis for ammonia synthesis. Such excellent properties are reigned from graphdiyne incorporating Fe site-specific magnetite resulting in a valence state transition within the catalyst. Our results show the strong advantages of graphdiyne in effectively regulating magnetite activity and coordination environments and also indicate that magnetite can selectively form two different valence tetrahedral coordination Fe and octahedral coordination Fe. The catalysts show remarkable catalytic performance for ammonia synthesis by photocatalysis, indicating transformative photocatalytic activity with an ammonia yield (YNH3 ) of unprecedented level of 1762.35 +/- 153.71 mu mol h(-1) g(cat.)(-1) (the highest YNH3 could reach up to 1916.06 mu mol h(-1) g(cat.)(-1)). This work makes full use of the structural and property features of graphdiyne and opens up a new direction for photocatalysis in the field of catalysis.

Automated summary

This study designed and fabricated a highly active graphdiyne heterojunction catalyst, showing transformative photocatalytic activity for ammonia synthesis by incorporating Fe site-specific magnetite into graphdiyne. The catalyst demonstrated remarkable catalytic performance with unprecedented levels of ammonia yield.