Journal
SUSTAINABILITY
Volume 13, Issue 14, Pages -Publisher
MDPI
DOI: 10.3390/su13148057
Keywords
carbon nanotube; coulombic efficiency; microbial fuel cell; nanocomposite; Pt
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In this study, CNT/Pt nanocomposites were synthesized as a cathode catalyst for MFCs, showing improved efficiency in wastewater treatment and energy production. The nanocomposite with a concentration of 0.3 mg/cm² exhibited the best performance in terms of CE, internal resistance, COD removal, and power generation, highlighting its potential for sustainable clean energy production.
In this paper, we reported the fabrication, characterization, and application of carbon nanotube (CNT)-platinum nanocomposite as a novel generation of cathode catalyst in microbial fuel cells (MFCs) for sustainable energy production and wastewater treatment. The efficiency of the carbon nanocomposites was compared by platinum (Pt), which is the most effective and common cathode catalyst. This nanocomposite is utilized to benefit from the catalytic properties of CNTs and reduce the amount of required Pt, as it is an expensive catalyst. The CNT/Pt nanocomposites were synthesized via a chemical reduction technique and the electrodes were characterized by field emission scanning electron microscopy, electronic dispersive X-Ray analysis, and transmission electron microscopy. The nanocomposites were applied as cathode catalysts in the MFC to obtain polarization curve and coulombic efficiency (CE) results. The catalytic properties of electrodes were tested by linear sweep voltammetry. The CNT/Pt at the concentration of 0.3 mg/cm(2) had the highest performance in terms of CE (47.16%), internal resistance (551 ohm), COD removal (88.9%), and power generation (143 mW/m(2)). In contrast, for the electrode with 0.5 mg/L of Pt catalyst, CE, internal resistance, COD removal, and power generation were 19%, 810 ohm, 96%, and 84.1 mW/m(2), respectively. So, it has been found that carbon nanocomposite cathode electrodes had better performance for sustainable clean energy production and COD removal by MFC.
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