Nanoconfined Nickel@Carbon Core-Shell Cocatalyst Promoting Highly Efficient Visible-Light Photocatalytic H2 Production

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Ke ZhangShi-Zhang Qiao

Abstract

The realization of large-scale solar hydrogen (H2 ) production relies on the development of high-performance and low-cost photocatalysts driven by sunlight. Recently, cocatalysts have demonstrated immense potential in enhancing the activity and stability of photocatalysts. Hence, the rational design of highly active and inexpensive cocatalysts is of great significance. Here, a facile method is reported to synthesize Ni@C core-shell nanoparticles as a highly active cocatalyst. After merging Ni@C cocatalyst with CdS nanorod (NR), a tremendously enhanced visible-light photocatalytic H2 -production performance of 76.1 mmol g-1 h-1 is achieved, accompanied with an outstanding quantum efficiency of 31.2% at 420 nm. The state-of-art characterizations (e.g., synchrotron-based X-ray absorption near edge structure) and theoretical calculations strongly support the presence of pronounced nanoconfinement effect in Ni@C core-shell nanoparticles, which leads to controlled Ni core size, intimate interfacial contact and rapid charge transfer, optimized electronic structure, and protection against chemical corrosion. Hence, the combination of nanoconfined Ni@C with CdS nanorod leads to significantly improved photocatalytic activity and stabilit...Continue Reading

References

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Citations

Apr 6, 2019·Dalton Transactions : an International Journal of Inorganic Chemistry·Kaustav ChatterjeeUjjal K Gautam
Aug 25, 2020·Chemical Communications : Chem Comm·Chaochen XuShi-Zhang Qiao
Mar 5, 2020·Nanoscale·Shuxian ZhongSong Bai
Jun 3, 2021·Chemical Reviews·Ryland C ForsytheAstrid M Müller

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