Single-Point Linkage Engineering in Conjugated Phthalocyanine-Based Covalent Organic Frameworks for Electrochemical CO2 Reduction (IMAGE)
Caption
- Three novel covalent organic frameworks (COFs) composed of nickel phthalocyanine units and different linkages, including dioxin, piperazine, and dithiine, were successfully constructed.
- It was found that only a single-point structural variation of the linkage in the COFs could effectively modulate their performance in CO2 reduction reaction, where the piperazine-linked COF achieved a pretty high Faradaic efficiency for CO of 90.7% at a critically low overpotential of 0.39 V.
- Theoretical calculations indicated that the COF with dioxin linkage stabilized the *COOH intermediate more effectively than the other two NiPc-based COFs.
Credit
Wenchang Chen, Yi Zhang, Mingyu Yang, Chao Yang, Zheng Meng.
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