Dual-Atom Catalysts Derived from a Preorganized Covalent Organic Framework for Enhanced Electrochemical Oxygen Reduction |
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| Authors: | Dr Wen-Da Zhang Lang Zhou Ya-Xiang Shi Dr Yong Liu Hanwen Xu Prof Dr Xiaodong Yan Yan Zhao Prof Dr Yuqin Jiang Prof Dr Jiangwei Zhang Prof Dr Zhi-Guo Gu |
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| Institution: | 1. Key Laboratory of Synthetic and Biological Colloids, Ministry of Education, School of Chemical and Material Engineering, Jiangnan University, Wuxi, 214122 P. R. China;2. Science Center of Energy Material and Chemistry, Inner Mongolia University, Hohhot, 010021 P. R. China;3. Henan Engineering Research Centre of Chiral Hydroxyl Pharmaceutical, School of Chemistry and Chemical Engineering, Henan Normal University, Xinxiang, 453007 P. R. China |
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| Abstract: | Dual-atom catalysts (DAC) are deemed as promising electrocatalysts due to the abundant active sites and adjustable electronic structure, but the fabrication of well-defined DAC is still full of challenges. Herein, bonded Fe dual-atom catalysts (Fe2DAC) with Fe2N6C8O2 configuration were developed through one-step carbonization of a preorganized covalent organic framework with bimetallic Fe chelation sites (Fe2COF). The transition from Fe2COF to Fe2DAC involved the dissociation of the nanoparticles and the capture of atoms by carbon defects. Benefitting from the optimized d-band center and enhanced adsorption of OOH* intermediates, Fe2DAC exhibited outstanding oxygen reduction activity with a half-wave potential of 0.898 V vs. RHE. This work will guide more fabrication of dual-atom and even cluster catalysts from preorganized COF in the future. |
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| Keywords: | Covalent Organic Framework Dual-Atom Catalysts Oxygen Reduction Reaction Preorganized Structure |
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