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Synthesis of Non-precious N-doped Mesoporous Fe3O4/CoO@NC Materials towards Efficient Oxygen Reduction Reaction for Microbial Fuel Cells |
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| Authors: | Bolong Jiang Decheng Lu Nan Jiang Hailin Jiang Lihua Qi Shunjie Shi Yanyan Cui Weiqiang Tan |
| Institution: | 1. Innovation Institute for Sustainable Maritime Architecture Research and Technology, Qingdao University of Technology, Qingdao, 266000 Shandong, China;2. Jingbo Petrochemical Corporation Ltd, Boxing, 256500 Shandong, China;3. Institute of Environmental and Municipal Engineering, Qingdao University of Technology, Qingdao, 266000 Shandong, China |
| Abstract: | N-doped transition metal oxides are strategic materials towards the efficient oxygen reduction reaction (ORR) of microbial fuel cells (MFCs). Non-precious N-doped Fe3O4/CoO@NC?T (T represents carbonization temperature) catalysts are prepared by an efficient two-step strategy for ORR. Fe3O4/CoO@NC-750 exhibits the best performance with an efficient four-electron transfer pathway. The optimal power density of MFCs by using Fe3O4/CoO@NC-750 as the cathode catalyst (1243.4 mW ? m?2) is superior to that of the MFCs with commercial Pt/C catalyst (1080 mW ? m?2), which shows an outstanding activity towards ORR. No significant decrease in output voltage results over 70 days, which shows an excellent electrochemical stability. |
| Keywords: | Microbial fuel cells oxygen reduction reaction air cathode Fe3O4/CoO catalyst zeolitic imidazolate framework |