期刊
CHEMCATCHEM
卷 13, 期 3, 页码 958-965出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/cctc.202001631
关键词
photoreduction of water; covalent triazine frameworks; Ni cocatalyst; hydrogen evolution
资金
- National Natural Science Foundation of China [21771131, 21971182]
- Priority Academic Program Development of Jiangsu Higher Education Institutions
The study presents a novel visible-light driven hydrogen generation method utilizing CTF photosensitizers and noble-metal-free cocatalysts. Composite materials prepared by dopant Ni and pyrimidine-2-thiolate in CTF-HC2 exhibit excellent photocatalytic performance for hydrogen generation, achieving high efficiency and recyclability under visible light.
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 lambda>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 mu mol h(-1) g(-1), which is 68 times of bare CTF-HC2 (51 mu mol h(-1) g(-1)) and 1.16 times of CTF-HC2 doped 2.0 wt % Pt (2991 mu mol h(-1) g(-1)). The efficient and recyclable heterogeneous photocatalytic H-2 production from water under visible light has been established.
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