کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
6454899 | 1418818 | 2017 | 7 صفحه PDF | دانلود رایگان |
- 3D Fe-embedded N doped carbon framework catalyst for microbial fuel cells.
- Outstanding oxygen reduction reaction performance in a neutral pH solution.
- Operation time more than 250Â h in a feed period.
A kind of 3D Fe-embedded N doped carbon framework catalyst is successfully developed and tested in the present work as a robust cathode catalyst for microbial fuel cells (MFCs). Due to the well-arranged mesopores, the high surface area, the interconnected conductive networks as well as the finely dispersed Fe-N active species, the as-prepared 3D Fe-N-C catalyst exhibits significantly enhanced ORR activity compared to commercial Pt/C. More precisely, the 3D Fe-N-C yields a more-positive half-wave potential of â0.08Â V (vs. SCE) and remarkably stable limiting current of â¼6.2Â mAÂ cmâ2. The 3D Fe-N-C shows also an excellent tolerance to methanol as well as remarkably long-term stability with more than 82.4% retention of its initial activity after 55.5Â h operation. Based on the as-prepared 3D Fe-N-C as the air cathode catalyst, a stable microbial fuel cell (MFC) device is fabricated and tested, performing a maximum power density of 3118.9Â mWÂ mâ2 at a high current density of 9980.8Â mAÂ mâ2. More importantly, it is found that the Fe-N-C MAFC device could steadily operate for more than 250Â h in a feed period, which is substantially longer than the Pt/C-MFC device.
A microbial fuel cell with high power density output is fabricated, using for air cathode a 3D Fe-embedded N doped carbon framework as Pt-free catalyst.365
Journal: Applied Catalysis B: Environmental - Volume 202, March 2017, Pages 550-556