N,P‐Codoped Carbon Networks as Efficient Metal‐free Bifunctional Catalysts for Oxygen Reduction and Hydrogen Evolution Reactions |
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| Authors: | Dr. Jintao Zhang Prof. Liangti Qu Prof. Gaoquan Shi Jiangyong Liu Prof. Jianfeng Chen Prof. Liming Dai |
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| Affiliation: | 1. Center of Advanced Science and Engineering for Carbon (Case4carbon), Department of Macromolecular Science and Engineering, Case Western Reserve University, Cleveland, OH, USA;2. Key Laboratory of Colloid and Interface Chemistry, Ministry of Education, School of Chemistry and Chemical Engineering, Shandong University, Jinan, China;3. Key Laboratory of Cluster Science, Ministry of Education, School of Chemistry, Beijing Institute of Technology, Beijing, China;4. Department of Chemistry, Tsinghua University, Beijing, China;5. State Key Laboratory of Organic-Inorganic Composites, BUCT-CWRU International Joint Laboratory, College of Energy, Beijing University of Chemical Technology, Beijing, China |
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| Abstract: | The high cost and scarcity of noble metal catalysts, such as Pt, have hindered the hydrogen production from electrochemical water splitting, the oxygen reduction in fuel cells and batteries. Herein, we developed a simple template‐free approach to three‐dimensional porous carbon networks codoped with nitrogen and phosphorus by pyrolysis of a supermolecular aggregate of self‐assembled melamine, phytic acid, and graphene oxide (MPSA/GO). The pyrolyzed MPSA/GO acted as the first metal‐free bifunctional catalyst with high activities for both oxygen reduction and hydrogen evolution. Zn–air batteries with the pyrolyzed MPSA/GO air electrode showed a high peak power density (310 W g?1) and an excellent durability. Thus, the pyrolyzed MPSA/GO is a promising bifunctional catalyst for renewable energy technologies, particularly regenerative fuel cells. |
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| Keywords: | electrocatalyst graphitic carbon hydrogen evolution oxygen reduction Zn-air battery |
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