Journal
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
Volume 59, Issue 52, Pages 23588-23592Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/anie.202012019
Keywords
CO(2)reduction; in situ exfoliation; metal-organic frameworks; nanosheets; photocatalysis
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Funding
- Strategic Priority Research Program of Chinese Academy of Sciences [XDB20000000]
- Hundred-Talent Program of Fujian Province
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Two novel two-dimensional metal-organic frameworks (2D MOFs), 2D-M2TCPE (M=Co or Ni, TCPE=1,1,2,2-tetra(4-carboxylphenyl)ethylene), which are composed of staggered (4,4)-grid layers based on paddlewheel-shaped dimers, serve as heterogeneous photocatalysts for efficient reduction of CO(2)to CO. During the visible-light-driven catalysis, these structures undergo in situ exfoliation to form nanosheets, which exhibit excellent stability and improved catalytic activity. The exfoliated 2D-M2TCPE nanosheets display a high CO evolution rate of 4174 mu mol g(-1) h(-1)and high selectivity of 97.3 % for M=Co and Ni, and thus are superior to most reported MOFs. The performance differences and photocatalytic mechanisms have been studied with theoretical calculations and photoelectric experiments. This study provides new insight for the controllable synthesis of effective crystalline photocatalysts based on structural and morphological coregulation.
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