Journal
APPLIED CATALYSIS B-ENVIRONMENTAL
Volume 280, Issue -, Pages -Publisher
ELSEVIER
DOI: 10.1016/j.apcatb.2020.119455
Keywords
Hydrogen production; Cocatalysts; Sulfur-rich NiS(1+)x nanoclusters; Active S sites
Funding
- National Natural Science Foundation of China [51672203, 21771142]
- Fundamental Research Funds for the Central Universities [WUT 2019IB002]
Ask authors/readers for more resources
Transition-metal sulfides, such as NiS1+x nanoclusters, have been shown to enhance H-2 evolution rates in photocatalysts by providing active unsaturated S sites. The study demonstrates that NiS1+x nanoclusters anchored on TiO2 particles greatly improve the efficiency and stability of photocatalytic H-2 production. This method can also be extended to other metal sulfides to further enhance H-2-evolution activity.
Transition-metal sulfides have been proved to be a favorable candidate for high-efficiency cocatalyst for photocatalysts, but the major bottlenecks remains lacking sufficient active sites for interfacial H-2-generation reactions. In this article, the sulfur-rich NiS1+x nanoclusters with abundant active unsaturated S sites are homogeneously anchored on TiO2 particles by a facile S2O32--mediated photodeposition route. The as-synthesized NiS1+x/TiO2(1 wt%) photocatalyst achieves the boosted H-2 evolution rate of 264.42 mu mol h(-1) as well as shows an outstanding stability and repeatability. The sulfur-rich NiS1+x nanoclusters can not only act as an outstanding cocatalyst to effectively accelerate the electron migration from TiO2 to NiS1+x nanoclusters, but also provide numerous active unsaturated S sites to promote interfacial H-2-generation reaction, thereby promoting the photocatalytic H-2 -production rate of the NiS1+x/TiO2 photocatalysts. Particularly, the present method can be extended to construct other metal sulfides (AgSx, CoSx or CuSx) to evidently promote the photocatalytic H-2-evolution activity.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available