Volume 133, Issue 9 pp. 4914-4921
Forschungsartikel

Stable Dioxin-Linked Metallophthalocyanine Covalent Organic Frameworks (COFs) as Photo-Coupled Electrocatalysts for CO2 Reduction

Meng Lu

Meng Lu

Jiangsu Collaborative Innovation Centre of Biomedical Functional Materials, School of Chemistry and Materials Science, Nanjing Normal University, No. 1, Wenyuan Road, Nanjing, 210023 China

These authors contributed equally to this work.

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Mi Zhang

Mi Zhang

School of Chemistry, South China Normal University, Guangzhou, 510006 P. R. China

These authors contributed equally to this work.

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Prof. Chun-Guang Liu

Prof. Chun-Guang Liu

Department of Chemistry, Faculty of Science, Beihua University, Jilin City, 132013 P. R. China

These authors contributed equally to this work.

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Dr. Jiang Liu

Dr. Jiang Liu

Jiangsu Collaborative Innovation Centre of Biomedical Functional Materials, School of Chemistry and Materials Science, Nanjing Normal University, No. 1, Wenyuan Road, Nanjing, 210023 China

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Lin-Jie Shang

Lin-Jie Shang

Jiangsu Collaborative Innovation Centre of Biomedical Functional Materials, School of Chemistry and Materials Science, Nanjing Normal University, No. 1, Wenyuan Road, Nanjing, 210023 China

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Min Wang

Min Wang

Jiangsu Collaborative Innovation Centre of Biomedical Functional Materials, School of Chemistry and Materials Science, Nanjing Normal University, No. 1, Wenyuan Road, Nanjing, 210023 China

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Jia-Nan Chang

Jia-Nan Chang

Jiangsu Collaborative Innovation Centre of Biomedical Functional Materials, School of Chemistry and Materials Science, Nanjing Normal University, No. 1, Wenyuan Road, Nanjing, 210023 China

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Prof. Shun-Li Li

Prof. Shun-Li Li

Jiangsu Collaborative Innovation Centre of Biomedical Functional Materials, School of Chemistry and Materials Science, Nanjing Normal University, No. 1, Wenyuan Road, Nanjing, 210023 China

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Prof. Ya-Qian Lan

Corresponding Author

Prof. Ya-Qian Lan

Jiangsu Collaborative Innovation Centre of Biomedical Functional Materials, School of Chemistry and Materials Science, Nanjing Normal University, No. 1, Wenyuan Road, Nanjing, 210023 China

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First published: 11 November 2020
Citations: 50

Abstract

In this work, we rationally designed a series of crystalline and stable dioxin-linked metallophthalocyanine covalent organic frameworks (COFs; MPc-TFPN COF, M=Ni, Co, Zn) under the guidance of reticular chemistry. As a novel single-site catalysts (SSCs), NiPc/CoPc-TFPN COF exhibited outstanding activity and selectivity for electrocatalytic CO2 reduction (ECR; Faradaic efficiency of CO (FECO)=99.8(±1.24) %/ 96.1(±1.25) % for NiPc/CoPc-TFPN COF). More importantly, when coupled with light, the FECO and current density (jCO) were further improved across the applied potential range (−0.6 to −1.2 V vs. RHE) compared to the dark environment for NiPc-TFPN COF (jCO increased from 14.1 to 17.5 A g−1 at −0.9 V; FECO reached up to ca. 100 % at −0.8 to −0.9 V). Furthermore, an in-depth mechanism study was established by density functional theory (DFT) simulation and experimental characterization. For the first time, this work explored the application of COFs as photo-coupled electrocatalysts to improve ECR efficiency, which showed the potential of using light-sensitive COFs in the field of electrocatalysis.

Conflict of interest

The authors declare no conflict of interest.

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