Journal
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
Volume 57, Issue 17, Pages 4632-4636Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/anie.201801029
Keywords
2D materials; exfoliation; metal-organic frameworks (MOFs); nanosheets; water oxidation
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Funding
- NSFC [21701191, 21473260, 21731007, 91622109]
- 973 Project [2014CB845602]
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Two-dimensional (2D) materials and ultrathin nanosheets are advantageous for elevating the catalysis performance and elucidating the catalysis mechanism of heterogeneous catalysts, but they are mostly restricted to inorganic or organic materials based on covalent bonds. We report an electrochemical/chemical exfoliation strategy for synthesizing metal-organic 2D materials based on coordination bonds. A catechol functionalized ligand is used as the redox active pillar to construct a pillared-layer framework. When the 3D pillared-layer MOF serves as an electrocatalyst for water oxidation (pH13), the pillar ligands can be oxidized insitu and removed. The remaining ultrathin (2nm) nanosheets of the metal-organic layers are an efficient catalyst with overpotentials as low as 211 mV at 10 mAcm(-2) and a turnover frequency as high as 30 s(-1) at an overpotential of 300 mV.
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