Bimetallic organic framework-derived, oxygen-defect-rich FexCo3-xS4/FeyCo9-yS8 heterostructure microsphere as a highly efficient and robust cathodic catalyst in the microbial fuel cell
| Autor: | Jiangli Sun, Yimin Yan, Zebin Yu, Shuangfei Wang, Shanming Qin, Lingli Tu, Danquan Lan, Guiyun Yuan, Shuo Chen, Yanping Hou |
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| Rok vydání: | 2020 |
| Předmět: |
Microbial fuel cell
Materials science Renewable Energy Sustainability and the Environment Energy Engineering and Power Technology chemistry.chemical_element 02 engineering and technology Internal resistance 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences Oxygen Cathode 0104 chemical sciences law.invention Catalysis Nickel chemistry Chemical engineering law Metal-organic framework Electrical and Electronic Engineering Physical and Theoretical Chemistry 0210 nano-technology Bimetallic strip |
| Zdroj: | Journal of Power Sources. 472:228582 |
| ISSN: | 0378-7753 |
| DOI: | 10.1016/j.jpowsour.2020.228582 |
| Popis: | The sluggish kinetics of cathodic oxygen reduction reaction (ORR) is one of the critical factors hindering the development of microbial fuel cells (MFCs). Herein, the metal organic framework (MOF)-derived FexCo3-xS4/FeyCo9-yS8 (FeCoS(MOF)) is in-situ grown on nickel foam as ORR catalyst with high doping of N and S. Results show that based on the role of FeCoMOF, the FeCoS(MOF) microspheres are made up of nanosheets piling-up without phase aggregation and structural collapse. Meanwhile, more defects are generated, resulting in low internal resistance, high quality activity and high turnover frequency. In the MFC with the FeCoS(MOF) cathode, the maximum power density is 2.55 times of that of Pt/C cathode. The excellent ORR activity is due to the unique morphology and rich oxygen defects, which shortens electronic transmission distance, facilitates the exposure of more active sites, and improves oxygen adsorption and conductivity. Moreover, the durability of FeCoS(MOF) cathode outperforms Pt/C cathode, with stable output voltage maintains for 2 months, while the Pt/C cathode decreases to 67% of the initial voltage. This work provides inspiration for developing efficient MOF-derived ORR catalyst. |
| Databáze: | OpenAIRE |
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