A Nitrogen,Sulfur co-Doped Porphyrin-based Covalent Organic Framework as an Efficient Catalyst for Oxygen Reduction |
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Authors: | YU Xiaoming MA Yunchao LI Cuiyan GUAN Xinyu FANG Qianrong QIU Shilun |
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Institution: | 1. State Key Laboratory of Inorganic Synthesis & Preparative Chemistry, Jilin University, Changchun 130012, P. R. China;2. Key Laboratory of Preparation and Application of Environmental Friendly Materials Ministry of Education, Jilin Normal University, Changchun 130103, P. R. China |
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Abstract: | Oxygen reduction reaction(ORR) is a significant reaction for energy conversion systems(such as fuel cells, metal-air batteries, etc.). It is an urgent need to develop cheap, durable and highly-active catalysts for efficient ORR. Hence, we report a metal-free nitrogen and sulfur co-doped porphyrin-based covalent organic framework(COF) as a high-efficiency ORR catalystthe onset potential(Eo) is 0.79 V and the half-wave potential(E1/2) is 0.70 V]. The double doping of N and S atoms causes uneven charge distribution around carbon atoms, which can act as catalytic active centers, improving ORR activity. Compared with single-atom doping, double atoms doping exhibits a higher activity due to the synergistic effect between different elements. These results demonstrate that reasonable design of stable metal-free COFs with a high electrochemical activity can promote their wide applications. |
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Keywords: | Covalent organic framework(COF) Oxygen reduction reaction co-Doped material |
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