کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
6471858 | 1424125 | 2017 | 9 صفحه PDF | دانلود رایگان |
- CoO nanosheets were in suit successfully generated onto N-AC.
- CoO@N-ACwasfirstutilizedascathodicelectrocatalystinMFCs.
- The rate and kinetics constant for ORR were greatly enhanced.
- The MPD was 1650.1 ± 36.2 mW mâ2, 122.5% higher than that of the control.
- CoO@N-AC is a promissing cathodic electocatalyst for MFCs.
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 m2 gâ1), 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 mâ2 to 1650.1 ± 36.2 mW mâ2, which is higher than that of Pt/C (1201.4 ± 13.5 mW mâ2). The excellent catalytic activity makes CoO@N-AC a promising cathodic electrocatalyst for practical application of MFCs.
Journal: Electrochimica Acta - Volume 232, 1 April 2017, Pages 339-347