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Title
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Single-layered imine-linked porphyrin-based two-dimensional covalent organic frameworks targeting CO₂ reduction
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Author
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Abstract
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| The reduction of carbon dioxide (CO2) using porphyrin-containing 2D covalent organic frameworks (2D-COFs) catalysts is widely explored nowadays. While these framework materials are normally fabricated as powders followed by their uncontrolled surface heterogenization or directly grown as thin films (thickness >200 nm), very little is known about the performance of substrate-supported single-layered (approximate to 0.5 nm thickness) 2D-COFs films (s2D-COFs) due to its highly challenging synthesis and characterization protocols. In this work, a fast and straightforward fabrication method of porphyrin-containing s2D-COFs is demonstrated, which allows their extensive high-resolution visualization via scanning tunneling microscopy (STM) in liquid conditions with the support of STM simulations. The as-prepared single-layered film is then employed as a cathode for the electrochemical reduction of CO2. Fe porphyrin-containing s2D-COF@graphite used as a single-layered heterogeneous catalyst provided moderate-to-high carbon monoxide selectivity (82%) and partial CO current density (5.1 mA cm(-2)). This work establishes the value of using single-layered films as heterogene ous catalysts and demonstrates the possibility of achieving high performance in CO2 reduction even with extremely low catalyst loadings. |
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Language
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English
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Source (journal)
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Advanced energy materials. - Weinheim, 2011, currens
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Publication
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Weinheim
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Wiley-v c h verlag gmbh
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2024
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ISSN
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1614-6832
[print]
1614-6840
[online]
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DOI
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10.1002/AENM.202304371
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Volume/pages
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14
:18
(2024)
, p. 1-7
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Article Reference
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2304371
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ISI
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001177577200001
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Full text (Publisher's DOI)
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Full text (open access)
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