Advances in carbon nitride supported single-atom photocatalysts for hydrogen evolution

Owing to their distinct collaboration nature, high atom usage, and high catalytic performance, single-atom catalysts have become most dynamically studied in various catalytic reactions. Graphitic carbon nitride (g-C₃N₄), as one of the most promising two-dimensional supports for stable immobilization of single-atom metals, has received extensive investigations. In this review, the recent developments of g-C₃N₄-supported single-atom photocatalysts for hydrogen evolution are summarized, with the metal-support interactions and structure regulations for stable and efficient catalysis being highlighted. Finally, the difficulties and potentials for future development of g-C₃N₄-supported single-atom materials in photocatalytic hydrogen evolution are proposed.