期刊
ACS NANO
卷 15, 期 8, 页码 13129-13139出版社
AMER CHEMICAL SOC
DOI: 10.1021/acsnano.1c02515
关键词
CsPbBr3; platinum; single-atom; trap states; photocatalysis
类别
资金
- National Natural Science Foundation of China [51922073, 21973067]
- Natural Science Foundation of Jiangsu Province [BK20180097]
- National Key Research and Development Program of China [2018YFB0703900]
- 111 Project
- Collaborative Innovation Center of Suzhou Nano Science and Technology (NANO-CIC)
- Priority Academic Program Development of Jiangsu Higher Education Institutions (PAPD)
- NSERC
- CFI
- CRC
- Postgraduate Research and Practice Innovation Program of Jiangsu Province [KYCX18_2505]
The study demonstrates that Pt single atoms can be successfully deposited on CsPbBr3 NCs through a photoassisted approach, leading to efficient photocatalytic properties. CsPbBr3 nanocrystals can also be used as suitable substrates for anchoring other metal single atoms, expanding their applications in catalysis.
Lead halide perovskite nanocrystals (CsPbX3 NCs) have been regarded as promising materials in photocatalysis. Combining metal single atoms with CsPbX3 NCs may be a practical way in exploring perovskite-based catalysts. However, such hybrids have not been achieved experimentally yet, mainly due to the weak interaction between the metal atom and the CsPbX3 surface. Here, we demonstrate that Pt single atoms can be deposited on CsPbBr3 NCs through a photoassisted approach, in which the surface was partially oxidized first, followed by the anchoring of Pt single atoms through the formation of Pt-O and Pt-Br bonds. The deposition of Pt single atoms can significantly change the photophysical properties of CsPbBr3 NCs by inducing the generation of deep trap states in the band gap. The as-prepared Pt-SA/CsPbBr3 can be used as efficient and durable catalysts for photocatalytic semi-hydrogenation of propyne. A CsPbBr3 nanocrystal might be a suitable substrate for anchoring other metal single atoms, such as Cu, Au, Ag, Pd, and so on.
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