期刊
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
卷 62, 期 11, 页码 -出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/anie.202217897
关键词
Charge Transfer; Host-Guest Systems; Metal-Organic Frameworks; Photocatalytic Hydrogen Evolution; Robust Internal Electric Field
In this study, a novel MOF photocatalyst is constructed by encapsulating C-60 into a nano-sized zirconium-based MOF, NU-901, resulting in a substantial electrostatic potential difference and a robust built-in electric field. The photocatalytic hydrogen evolution rate for C-60@NU-901 reaches 22.3 mmol g(-1) h(-1), which is among the highest values for MOFs. Harnessing host-guest interactions to enhance charge separation is a promising strategy for designing efficient photocatalysts for solar-to-chemical energy conversion.
High-efficiency photocatalysts based on metal-organic frameworks (MOFs) are often limited by poor charge separation and slow charge-transfer kinetics. Herein, a novel MOF photocatalyst is successfully constructed by encapsulating C-60 into a nano-sized zirconium-based MOF, NU-901. By virtue of host-guest interactions and uneven charge distribution, a substantial electrostatic potential difference is set-up in C-60@NU-901. The direct consequence is a robust built-in electric field, which tends to be 10.7 times higher in C-60@NU-901 than that found in NU-901. In the catalyst, photogenerated charge carriers are efficiently separated and transported to the surface. For example, photocatalytic hydrogen evolution reaches 22.3 mmol g(-1) h(-1) for C-60@NU-901, which is among the highest values for MOFs. Our concept of enhancing charge separation by harnessing host-guest interactions constitutes a promising strategy to design photocatalysts for efficient solar-to-chemical energy conversion.
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