Effect of nitrogen doping on the catalytic activity of carbon nano-onions for the oxygen reduction reaction in microbial fuel cells
| Autor: | Neelima Mahato, Thi Hiep Han, Jun Ho Shim, Jae-Jin Shim, Debananda Mohapatra, Smrutiranjan Parida, Van Quang Nguyen, Moo Hwan Cho, Anh Thi Nguyet Nguyen |
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| Rok vydání: | 2020 |
| Předmět: |
Reaction mechanism
Microbial fuel cell Materials science General Chemical Engineering chemistry.chemical_element 02 engineering and technology 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences Nitrogen Cathode 0104 chemical sciences law.invention Catalysis Chemical engineering chemistry law Electrode Nano 0210 nano-technology Carbon |
| Zdroj: | Journal of Industrial and Engineering Chemistry. 81:269-277 |
| ISSN: | 1226-086X |
| Popis: | In this study, highly graphitic nitrogen-doped carbon nano-onions (N-CNOs) were prepared by a one-step, direct, in situ flame synthesis technique and their potential applications as catalysts for oxygen reduction reaction (ORR) in a microbial fuel cell (MFC) were evaluated for the first time. The ORR activity of the CNO, N-CNO, and the commercial Pt/C were measured using a rotating ring-disk electrode (RRDE). The reaction mechanism for the N-CNO was found to follow a four-electron transfer pathway and possess a higher onset potential in RRDE measurement than CNOs. The ORR activity of N-CNO was 5.4 times better than that of CNO, which was attributed to the introduction of nitrogen to the carbon faramework. The MFC fabricated with the N-CNO cathode produced a maximum power density of 49.6 mW m–2, which was approximately double the performance of the CNO-based MFC. The performance of N-CNO was low compared to Pt/C but the cost per power was only 1/310th. These results confirmed that N-CNOs could be used as a low-cost alternative and an energy-efficient metal-free ORR catalyst for practical MFC applications. |
| Databáze: | OpenAIRE |
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