Journal
NANO ENERGY
Volume 101, Issue -, Pages -Publisher
ELSEVIER
DOI: 10.1016/j.nanoen.2022.107616
Keywords
Photocatalysis; Electron spin polarization; Hydrogen evolution; Defect; Z-scheme heterojunction
Categories
Funding
- National Natural Science Foundation of China [52172206, 21871078]
- Heilongjiang Province Natural Science Foundation of China [JQ2019B001]
- Shandong Province Natural Science Foundation [ZR2021MB016]
- Heilongjiang Provincial Institutions of Higher Learning Basic Research Funds Basic Research Projects [2021-KYYWF-0007]
- Heilongjiang Postdoctoral Startup Fund [LBH-Q14135]
- Heilongjiang University Science Fund for Distinguished Young Scholars [JCL201802]
- Heilongjiang Touyan Innovation Team Program
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Electron spin polarization plays a vital role in photocatalysis, but it is rarely taken into consideration. In this study, a double-layer hollow yolk-shell superstructure photocatalyst was prepared and it successfully enhanced the photocatalytic hydrogen evolution efficiency. The optimized photocatalytic performance was attributed to the enhanced electron spin polarization and the formation of Z-scheme heterojuctions.
Electron spin polarization plays a vital role on photocatalysis but rarely considered. Herein, a double-layer hollow yolk-shell Pd/CoP@CoNiP superstructure photocatalyst is prepared via two ion exchanges approach using Co-MOF as a template. It shows ferromagnetic characteristics and obvious photothermal effect due to the special structure. Interestingly, the photocatalytic hydrogen evolution is enhanced about twice under external magnetic field compared to field-free. The improvement can be ascribed to the enhanced electron spin polari-zation of the vacancy defects for Pd/CoP@CoNiP superstructure and the formation of Z-scheme heterojunctions promoting efficient photogenerated charge separation and prolonging the lifetimes obviously. The special double-layer hollow yolk-shell superstructure is another reason for the optimized photocatalytic performance, which could expose adequate surface active sites for photocatalytic reaction. Moreover, the high stability of this defective Pd/CoP@CoNiP superstructure indicates the potential applications in field of photocatalysis. This strategy may provide new insights for fabricating high-efficient superstructure photocatalysts with electron spin polarization.
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