Journal
RSC ADVANCES
Volume 11, Issue 20, Pages 12153-12161Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/d1ra00625h
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Funding
- Natural Science Foundation of Henan Province [182300410246]
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The study fabricated 2D/2D sheets of Ni2P/CdS heterostructure for photocatalytic H-2 evolution, demonstrating that Ni2P acted as an excellent cocatalyst providing abundant active sites, significantly improving the separation efficiency of photogenerated electrons and holes.
Two-dimensional (2D) semiconductor materials have attracted considerable attention in the field of photocatalysis due to the high interfacial charge separation efficiency and abundant surface active sites. Herein, we have fabricated 2D/2D sheets of Ni2P/CdS heterostructure for photocatalytic H-2 evolution. The microscopic and photocatalytic activity results suggested that Ni2P nanosheets were coupled with snowflake CdS. The optimal hydrogen production rate reached 58.33 mmol h(-1) g(-1) (QE = 34.38%, lambda = 420 nm) over 5 wt% Ni2P, which is equivalent to that of 1 wt% Pt/CdS. Compared with pure CdS, Ni2P/CdS presented lower fluorescence intensity and stronger photocurrent density, which demonstrated that the 2D/2D Ni2P/CdS heterojunction photocatalyst significantly improved the separation efficiency of photogenerated electrons and holes. The excellent performance of Ni2P/CdS clearly indicated that Ni2P was an excellent cocatalyst and could provide abundant active sites for hydrogen evolution.
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