Single-atom catalysts supported on covalent triazine frameworks

Covalent triazine frameworks (CTFs) are relatively novel materials and could be used as supports for single-atom metal catalysts (SACs), which attract a lot of interest during last years. The present review shows that CTFs are suitable supports for SACs for different reactions including oxidation, hydroformylation, O₂ reduction, N₂ fixation, CO₂ photoreduction, hydrogen production, transfer and evolution. It discusses synthesis techniques and focuses on the structure of the obtained single-atom active sites including Pd, Ir, Ru, Rh, Pt, Ni, Co, Cu, and Fe atoms. It also considers some mechanisms of the mentioned reactions. The critical challenges and future perspectives for SACs based on CTFs are considered. This knowledge could be used as a base for design and engineering of single-atom active sites and will allow one to develop novel catalysts for different catalytic processes.