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Heterostructure construction of covalent organic frameworks/Ti 3 C 2 -MXene for high-efficiency electrocatalytic CO 2 reduction
Covalent organic frameworks (COFs), as typical organic functional materials, have shown promising potential for application in photo/electrocatalysis, especially in the electrocatalytic CO 2 reduction reaction (CO 2 RR). COFs can ensure effective CO 2 adsorption and rapid mass transfer by virtue of...
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Published in: | Green chemistry : an international journal and green chemistry resource : GC 2024-02, Vol.26 (3), p.1454-1461 |
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Main Authors: | , , , , , , |
Format: | Article |
Language: | English |
Citations: | Items that this one cites Items that cite this one |
Online Access: | Get full text |
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Summary: | Covalent organic frameworks (COFs), as typical organic functional materials, have shown promising potential for application in photo/electrocatalysis, especially in the electrocatalytic CO
2
reduction reaction (CO
2
RR). COFs can ensure effective CO
2
adsorption and rapid mass transfer by virtue of controllable active sites and a large specific surface area. However, the inefficient interlayer conductivity of most COFs leads to a low electron transfer rate that restricts their practical applications. In this work, porphyrin-based covalent organic framework nanosheets (Por-COF) were vertically grown on the modified MXene surface for efficient electrocatalytic CO
2
RR. The large exposed MXene surface serves as a carrier “bridge” for dispersed COFs, which can endow heterojunctions with more active sites and fast ion transport channels. The optimal sample can exhibit superior efficient CO
2
RR performance, in which the faradaic efficiency of the CO
2
-to-CO conversion was 97.28% at −0.6 V
vs.
RHE, and the bias current density was −9.33 mA cm
−2
at −1.0 V
vs.
RHE. |
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ISSN: | 1463-9262 1463-9270 |
DOI: | 10.1039/D3GC03778A |