Volume 61, Issue 31 e202206283
Research Article

Bioinspired Metalation of the Metal-Organic Framework MIL-125-NH2 for Photocatalytic NADH Regeneration and Gas-Liquid-Solid Three-Phase Enzymatic CO2 Reduction

Gang Lin

Gang Lin

College of Materials Science and Engineering, Qingdao University of Science and Technology, Qingdao, 266042 P. R. China

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Yuanyuan Zhang

Yuanyuan Zhang

College of Materials Science and Engineering, Qingdao University of Science and Technology, Qingdao, 266042 P. R. China

Qingdao Institute of Bioenergy and Bioprocess Technology, Chinese Academy of Sciences, Shandong Energy Institute, Qingdao, 266101 P. R. China

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Yutao Hua

Yutao Hua

College of Materials Science and Engineering, Qingdao University of Science and Technology, Qingdao, 266042 P. R. China

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Chunhui Zhang

Chunhui Zhang

Key Laboratory of Bio-inspired Smart Interfacial Science and Technology of Ministry of Education, School of Chemistry, Beihang University, Beijing, 100191 P. R. China

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Dr. Changchao Jia

Dr. Changchao Jia

College of Materials Science and Engineering, Qingdao University of Science and Technology, Qingdao, 266042 P. R. China

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Dr. Dianxing Ju

Corresponding Author

Dr. Dianxing Ju

College of Materials Science and Engineering, Qingdao University of Science and Technology, Qingdao, 266042 P. R. China

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Dr. Cunming Yu

Dr. Cunming Yu

Key Laboratory of Bio-inspired Smart Interfacial Science and Technology of Ministry of Education, School of Chemistry, Beihang University, Beijing, 100191 P. R. China

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Prof. Peng Li

Corresponding Author

Prof. Peng Li

Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials, Department of Chemistry, Fudan University, Shanghai, 200433 P. R. China

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Prof. Jian Liu

Corresponding Author

Prof. Jian Liu

College of Materials Science and Engineering, Qingdao University of Science and Technology, Qingdao, 266042 P. R. China

Qingdao Institute of Bioenergy and Bioprocess Technology, Chinese Academy of Sciences, Shandong Energy Institute, Qingdao, 266101 P. R. China

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First published: 18 May 2022
Citations: 102

Graphical Abstract

Bioinspired metalation of the MOF MIL-125-NH2 was accomplished by incorporating the electron-transfer unit of a Rh complex for facilitated photocatalytic NADH regeneration. By immobilizing formate dehydrogenase onto the hydrophobic layer of the membrane, a gas-liquid-solid three-phase interface around the enzyme site could be formed for sustained and enhanced formic acid production coupled with in situ generated NADH.

Abstract

Coenzyme NADH regeneration is crucial for sustained photoenzymatic catalysis of CO2 reduction. However, light-driven NADH regeneration still suffers from the low regeneration efficiency and requires the use of a homogeneous Rh complex. Herein, a Rh complex-based electron transfer unit was chemically attached onto the linker of the MIL-125-NH2. The coupling between the light-harvesting iminopyridine unit and electron-transferring Rh-complex facilitated the photo-induced electron transfer for the NADH regeneration with the yield of 66.4 % in 60 mins for 5 cycles. The formate dehydrogenase was further deposited onto the hydrophobic layer of the membrane by a reverse filtering technique, which forms the gas-liquid-solid reaction interface around the enzyme site. It gave an enhanced formic acid yield of 9.5 mM in 24 hours coupled with the in situ regenerated NADH. The work could shed light on the construction of integrated inorganic-enzyme hybrid systems for artificial photosynthesis.

Conflict of interest

The authors declare no conflict of interest.

Data Availability Statement

The data that support the findings of this study are available in the Supporting Information of this article.

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