Volume 61, Issue 2 e202113067
Communication

Near-Equilibrium Growth of Chemically Stable Covalent Organic Framework/Graphene Oxide Hybrid Materials for the Hydrogen Evolution Reaction

Yichao Bai

Yichao Bai

Beijing National Laboratory for Molecular Sciences, Key Laboratory of Organic Solids, Institute of Chemistry, Chinese Academy of Sciences, Beijing, 100190 P. R. China

University of Chinese Academy of Sciences, Beijing, 100049 P. R. China

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Youxing Liu

Youxing Liu

Beijing National Laboratory for Molecular Sciences, Key Laboratory of Organic Solids, Institute of Chemistry, Chinese Academy of Sciences, Beijing, 100190 P. R. China

University of Chinese Academy of Sciences, Beijing, 100049 P. R. China

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Minghui Liu

Minghui Liu

Beijing National Laboratory for Molecular Sciences, Key Laboratory of Organic Solids, Institute of Chemistry, Chinese Academy of Sciences, Beijing, 100190 P. R. China

University of Chinese Academy of Sciences, Beijing, 100049 P. R. China

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Xinyu Wang

Xinyu Wang

Beijing National Laboratory for Molecular Sciences, Key Laboratory of Organic Solids, Institute of Chemistry, Chinese Academy of Sciences, Beijing, 100190 P. R. China

University of Chinese Academy of Sciences, Beijing, 100049 P. R. China

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Shengcong Shang

Shengcong Shang

Beijing National Laboratory for Molecular Sciences, Key Laboratory of Organic Solids, Institute of Chemistry, Chinese Academy of Sciences, Beijing, 100190 P. R. China

University of Chinese Academy of Sciences, Beijing, 100049 P. R. China

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Wenqiang Gao

Wenqiang Gao

Beijing National Laboratory for Molecular Sciences, Key Laboratory of Organic Solids, Institute of Chemistry, Chinese Academy of Sciences, Beijing, 100190 P. R. China

University of Chinese Academy of Sciences, Beijing, 100049 P. R. China

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Changsheng Du

Changsheng Du

Beijing National Laboratory for Molecular Sciences, Key Laboratory of Organic Solids, Institute of Chemistry, Chinese Academy of Sciences, Beijing, 100190 P. R. China

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Yan Qiao

Yan Qiao

University of Chinese Academy of Sciences, Beijing, 100049 P. R. China

Beijing National Laboratory for Molecular Sciences (BNLMS), Laboratory of Polymer Physics and Chemistry, CAS Research/Education Center for Excellence in Molecular Sciences, Institute of Chemistry, Chinese Academy of Sciences, Beijing, 100190 China

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Prof. Dr. Jianyi Chen

Corresponding Author

Prof. Dr. Jianyi Chen

Beijing National Laboratory for Molecular Sciences, Key Laboratory of Organic Solids, Institute of Chemistry, Chinese Academy of Sciences, Beijing, 100190 P. R. China

University of Chinese Academy of Sciences, Beijing, 100049 P. R. China

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Prof. Dr. Jichen Dong

Corresponding Author

Prof. Dr. Jichen Dong

Beijing National Laboratory for Molecular Sciences, Key Laboratory of Organic Solids, Institute of Chemistry, Chinese Academy of Sciences, Beijing, 100190 P. R. China

University of Chinese Academy of Sciences, Beijing, 100049 P. R. China

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Prof. Dr. Yunqi Liu

Corresponding Author

Prof. Dr. Yunqi Liu

Beijing National Laboratory for Molecular Sciences, Key Laboratory of Organic Solids, Institute of Chemistry, Chinese Academy of Sciences, Beijing, 100190 P. R. China

University of Chinese Academy of Sciences, Beijing, 100049 P. R. China

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First published: 26 October 2021
Citations: 32

Graphical Abstract

A liquid-phase method has been developed for the synthesis of highly conjugated covalent organic frameworks (COFs). Vacuum filtration leads to the formation of a uniform conducting film of the COFs and COF-GO hybrid materials on a variety of substrates. The overpotential of one of the materials was as low as 45 mV in 0.5 m H2SO4 and reached a current density of 10 mA cm−2, which is better than all the metal-free catalysts currently available.

Abstract

Facile synthesis and post-processing of covalent organic frameworks (COFs) under mild synthetic conditions are highly sought after and important for widespread utilizations in catalysis and energy storage. Here we report the synthesis of the chemically stable aza-fused COFs BPT-COF and PT-COF by a liquid-phase method. The process involves the spontaneous polycondensation of vicinal diamines and vicinal diketones, and is driven by the near-equilibrium growth of COF domains at a very low monomer concentration. The method permits in situ assembly of COFs and COF-GO hybrid materials and leads to the formation of a uniform conducting film on arbitrary substrates on vacuum filtration. When used as electrocatalysts, the as-prepared membranes show a fast hydrogen evolution reaction (HER) with a low overpotential (45 mV at 10 mA cm−2) and a small Tafel slope (53 mV dec−1), which are the best among metal-free catalysts. Our results may open a new route towards the preparation of highly π-conjugated COFs for multifunctional applications.

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