Volume 136, Issue 2 e202314266
Forschungsartikel

High-efficiency Electroreduction of O2 into H2O2 over ZnCo Bimetallic Triazole Frameworks Promoted by Ligand Activation

Zi-Meng Li

Zi-Meng Li

College of Chemical Engineering, National Engineering Research Center of Chemical Fertilizer Catalyst, Fuzhou University, Fuzhou, 350002 China

These authors contributed equally to this work.

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Dr. Chao-Qi Zhang

Dr. Chao-Qi Zhang

School of Chemistry and Molecular Engineering, East China Normal University, Shanghai, 200241 China

These authors contributed equally to this work.

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Prof. Chao Liu

Corresponding Author

Prof. Chao Liu

School of Chemistry and Molecular Engineering, East China Normal University, Shanghai, 200241 China

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Prof. Hong-Wei Zhang

Prof. Hong-Wei Zhang

College of Chemical Engineering, National Engineering Research Center of Chemical Fertilizer Catalyst, Fuzhou University, Fuzhou, 350002 China

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Dr. Hao Song

Dr. Hao Song

Australian Institute for Bioengineering and Nanotechnology, The University of Queensland, Brisbane, Queensland, 4072 Australia

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Prof. Zhi-Qiang Zhang

Prof. Zhi-Qiang Zhang

Shanghai Key Laboratory of Chemical Assessment and Sustainability, School of Chemical Science and Engineering, College of Environmental Science and Engineering, Tongji University, Shanghai, 200092 China

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Prof. Guang-Feng Wei

Corresponding Author

Prof. Guang-Feng Wei

Shanghai Key Laboratory of Chemical Assessment and Sustainability, School of Chemical Science and Engineering, College of Environmental Science and Engineering, Tongji University, Shanghai, 200092 China

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Prof. Xiao-Jun Bao

Prof. Xiao-Jun Bao

College of Chemical Engineering, National Engineering Research Center of Chemical Fertilizer Catalyst, Fuzhou University, Fuzhou, 350002 China

Qingyuan Innovation Laboratory, Quanzhou, 362801 China

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Prof. Cheng-Zhong Yu

Corresponding Author

Prof. Cheng-Zhong Yu

School of Chemistry and Molecular Engineering, East China Normal University, Shanghai, 200241 China

Australian Institute for Bioengineering and Nanotechnology, The University of Queensland, Brisbane, Queensland, 4072 Australia

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Prof. Pei Yuan

Corresponding Author

Prof. Pei Yuan

College of Chemical Engineering, National Engineering Research Center of Chemical Fertilizer Catalyst, Fuzhou University, Fuzhou, 350002 China

Qingyuan Innovation Laboratory, Quanzhou, 362801 China

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First published: 08 November 2023

Abstract

Co-based metal–organic frameworks (MOFs) as electrocatalysts for two-electron oxygen reduction reaction (2e ORR) are highly promising for H2O2 production, but suffer from the intrinsic activity-selectivity trade-off. Herein, we report a ZnCo bimetal-triazole framework (ZnCo-MTF) as high-efficiency 2e ORR electrocatalysts. The experimental and theoretical results demonstrate that the coordination between 1,2,3-triazole and Co increases the antibonding-orbital occupancy on the Co−N bond, promoting the activation of Co center. Besides, the adjacent Zn−Co sites on 1,2,3-triazole enable an asymmetric “side-on” adsorption mode of O2, favoring the reduction of O2 molecules and desorption of OOH* intermediate. By virtue of the unique ligand effect, the ZnCo-MTF exhibits a 2e ORR selectivity of ≈100 %, onset potential of 0.614 V and H2O2 production rate of 5.55 mol gcat−1 h−1, superior to the state-of-the-art zeolite imidazole frameworks. Our work paves the way for the design of 2e ORR electrocatalysts with desirable coordination and electronic structure.

Conflict of interest

The authors declare no conflict of interest.

Data Availability Statement

The data that support the findings of this study are available from the corresponding author upon reasonable request.

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