CoO nanosheets in situ grown on nitrogen-doped activated carbon as an effective cathodic electrocatalyst for oxygen reduction reaction in microbial fuel cells
Autor: | Longlong Zhu, Huangying Wu, Huang Qiangsheng, Hua Yang, Peijiang Zhou |
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Rok vydání: | 2017 |
Předmět: |
Microbial fuel cell
Materials science Nanocomposite General Chemical Engineering Inorganic chemistry Oxide chemistry.chemical_element 02 engineering and technology 010402 general chemistry 021001 nanoscience & nanotechnology Electrocatalyst 01 natural sciences Redox 0104 chemical sciences Catalysis chemistry.chemical_compound chemistry Chemical engineering Electrochemistry medicine 0210 nano-technology Carbon Activated carbon medicine.drug |
Zdroj: | Electrochimica Acta. 232:339-347 |
ISSN: | 0013-4686 |
DOI: | 10.1016/j.electacta.2017.02.163 |
Popis: | A low cost, naturally abundant, and highly active oxygen reduction reaction (ORR) electrocatalyst is essential for the commercialization of microbial fuel cells (MFCs). In this study, a promising strategy was proposed to prepare catalyst CoO nanosheets supported by nitrogen-doped activated carbon (CoO@N-AC) to achieve a synergetic effect between metallic oxide and heteroatom-doped carbon. The nanocomposites possess a large Brunauer–Emmett–Teller surface area (1577.2 m 2 g −1 ), low total resistance (9.26 Ω), and four-electron ORR pathway. These nanocomposites are utilized as the air-cathode catalysts in MFCs. CoO@N-AC remarkably increases the maximum power density by 122.5% from 741.5 ± 8.5 mW m −2 to 1650.1 ± 36.2 mW m −2 , which is higher than that of Pt/C (1201.4 ± 13.5 mW m −2 ). The excellent catalytic activity makes CoO@N-AC a promising cathodic electrocatalyst for practical application of MFCs. |
Databáze: | OpenAIRE |
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