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Carbon supported nickel-phthalocyanine/MnOx as novel cathode catalyst for microbial fuel cell application
Authors:B.R. Tiwari  Md. T. Noori  M.M. Ghangrekar
Affiliation:1. Department of Civil Engineering, Indian Institute of Technology, Kharagpur 721302, India;2. Department of Agriculture and Food Engineering, Indian Institute of Technology, Kharagpur 721302, India
Abstract:
Performance of microbial fuel cells (MFCs) with carbon supported nickel phthalocyanine (NiPc)/>MnO<sub>x</sub> composite (MFC-1) and nickel phthalocyanine (MFC-2) incorporated cathode was compared with a control MFC with non-catalysed carbon felt as cathode (MFC-3) and MFC-4 having Pt on cathode (as benchmark reference control). MFC-1 exhibited power density of 8.02 Wm<sup>?3</sup>, which was four folds higher than control MFC-3 (2.08 Wm<sup>?3</sup>) and 1.14 times higher than MFC-2 (6.97 Wm<sup>?3</sup>). Coulombic efficiency of 30.3% obtained in MFC-1 was almost double of that obtained for control MFC-3 and it was 5.4% lesser as compared to MFC-4 (35.7%). Linear sweep voltammetry study of cathodes revealed that NiPc-MnO<sub>x</sub> could enhance the electrocatalytic activity of oxygen reduction reaction (ORR) in comparison to control cathode. However, the power recovery from MFC-1 was noted little lower than what obtained from MFC-4 (10.58 Wm<sup>?3</sup>), however the cost normalized power was two times higher than Pt catalyst on cathode. Thus, NiPc-MnO<sub>x</sub> based catalyst developed in this study has potential to enhance ORR in cathodes of MFCs in order to harvest more power.</td>
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Keywords:Cathode catalyst  Coulombic efficiency  Microbial fuel cells  Oxygen reduction reaction  Phthalocyanine
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