Boosting Visible‐Light‐Driven H<sub>2</sub> Evolution of Covalent Triazine Framework from Water by Modifying Ni(II) Pyrimidine‐2‐thiolate Cocatalyst
Ze Xu, Yao Cui, Bin Guo, Haiyan Li, Hong‐Xi Li, Hong‐Xi Li, Hong‐Xi Li
Abstract
Abstract Covalent triazine frameworks (CTFs) have recently emerged as prospective photoactive materials coupled with Pt or Pd cocatalyst for the hydrogen evolution. Herein, we report visible‐light driven hydrogen generation catalyzed by heterogeneous systems combining CTF photosensitizers and a noble‐metal‐free cocatalyst for the first time. CTF‐HC2 was doped with two‐dimensional Ni(II) pyrimidine‐2‐thiolate ([Ni(pymt) 2 ] n ) to yield a series of x‐[Ni(pymt) 2 ] n /CTF‐HC2 (x=3, 6, 9, 12, 15, 18 and 24 wt %) composites. Illuminated with λ>420 nm, [Ni(pymt) 2 ] n /CTF‐HC2 materials display excellent photocatalytic performance for H 2 generation from water. The highest hydrogen evolution rate is up to 3472 μmol h −1 g −1 , which is 68 times of bare CTF‐HC2 (51 μmol h −1 g −1 ) and 1.16 times of CTF‐HC2 doped 2.0 wt % Pt (2991 μmol h −1 g −1 ). The efficient and recyclable heterogeneous photocatalytic H 2 production from water under visible light has been established.