The photocatalyst of the new metal-organic framework accelerates the decomposition of water to produce hydrogen

Photocatalytic water splitting to produce hydrogen is one of the ideal ways to convert solar energy into chemical energy. However, developing an efficient photocatalyst with a wide range of visible light absorption for this process is still challenging.

Recently, a research group led by Professor Zhang Fuxiang of the Dalian Institute of Chemical Physics (DICP) at the Chinese Academy of Sciences has developed a new broad visible light responsive Ni-metal organic framework (MOF) photocatalyst that has the potential to enhance water. did.Generate by dividing hydrogen Under visible light irradiation.

This study was published in Journal of the American Chemical Society February 2.

Researchers have found that 1,3,6,8-tetrakis (p-benzoic acid) pyrene (H)_FourTBAPy) With a ligand as a light-harvesting complex [Ni₃O₁₆] Nickel oxide clusters as catalyst centers to the MOF single crystal framework, then stripped into 2DNi-TBAPy-NB nanobelts.

Benefiting from a special 2D nanobelt, the ordered coordination structure and special framework structure include the nanobelt’s condensing center and catalytic sites, resulting in high charge separation efficiency and water reduction activity in the nanobelt. rice field. The apparent quantum efficiency of photocatalytic water splitting to produce hydrogen reached 8.0% (420 ± 10 nm excitation).

“These results provide a reference for the design and synthesis of other high efficiency MOF-based photocatalytic materials for efficient photovoltaics.Chemical energy Conversion. ”