Journal
ADVANCED MATERIALS
Volume 30, Issue 40, Pages -Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/adma.201803641
Keywords
2D materials; black phosphorus; heterostructures; photocatalysis; ultrasmall platinum nanoparticles
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Funding
- Key Research Program of Frontier Sciences, CAS [QYZDB-SSW-SLH034]
- Shenzhen Science and Technology Research Funding [JCYJ20170818163003088, JCYJ20160229195124187]
- China Postdoctoral Science Foundation [2017M612759, 2017M622824]
- Leading Talents of Guangdong Province Program [00201520]
- Chinese Academy of Sciences Technology Service Network Program [KFJ-STS-SCYD-102]
- Hong Kong Research Grants Council (RGC) General Research Funds (GRF) [CityU 11301215, 11205617]
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A 2D black phosphorus/platinum heterostructure (Pt/BP) is developed as a highly efficient photocatalyst for solar-driven chemical reactions. The heterostructure, synthesized by depositing BP nanosheets with ultrasmall (approximate to 1.1 nm) Pt nanoparticles, shows strong Pt-P interactions and excellent stability. The Pt/BP heterostructure exhibits obvious P-type semiconducting characteristics and efficient absorption of solar energy extending into the infrared region. Furthermore, during light illumination, accelerated charge separation is observed from Pt/BP as manifested by the ultrafast electron migration (0.11 ps) detected by a femtosecond pump-probe microscopic optical system as well as efficient electron accumulation on Pt revealed by in situ X-ray photoelectron spectroscopy. These unique properties result in remarkable performance of Pt/BP in typical hydrogenation and oxidation reactions under simulated solar light illumination, and its efficiency is much higher than that of other common Pt catalysts and even much superior to that of conventional thermal catalysis. The 2D Pt/BP heterostructure has enormous potential in photochemical reactions involving solar light and the results of this study provide insights into the design of next-generation high-efficiency photocatalysts.
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