Bifunctional Manganese Ferrite/Polyaniline Hybrid as Electrode Material for Enhanced Energy Recovery in Microbial Fuel Cell

ACS Applied Materials & Interfaces
Santimoy KhilariDebabrata Pradhan

Abstract

Microbial fuel cells (MFCs) are emerging as a sustainable technology for waste to energy conversion where electrode materials play a vital role on its performance. Platinum (Pt) is the most common material used as cathode catalyst in the MFCs. However, the high cost and low earth abundance associated with Pt prompt the researcher to explore inexpensive catalysts. The present study demonstrates a noble metal-free MFC using a manganese ferrite (MnFe2O4)/polyaniline (PANI)-based electrode material. The MnFe2O4 nanoparticles (NPs) and MnFe2O4 NPs/PANI hybrid composite not only exhibited superior oxygen reduction reaction (ORR) activity for the air cathode but also enhanced anode half-cell potential upon modifying carbon cloth anode in the single-chambered MFC. This is attributed to the improved extracellular electron transfer of exoelectrogens due to Fe(3+) in MnFe2O4 and its capacitive nature. The present work demonstrates for the first time the dual property of MnFe2O4 NPs/PANI, i.e., as cathode catalyst and an anode modifier, thereby promising cost-effective MFCs for practical applications.

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Citations

Aug 16, 2016·Chemistry : a European Journal·Anika SöldnerBurkhard König
Feb 18, 2017·Chemical Society Reviews·Cui-E ZhaoJun-Jie Zhu
Nov 15, 2018·Dalton Transactions : an International Journal of Inorganic Chemistry·Shanmugam MahalingamYoung-Ho Ahn
Nov 27, 2020·Environmental Science and Pollution Research International·Abdul Sattar JatoiShoaib Ahmed
Dec 2, 2020·Materials Science & Engineering. C, Materials for Biological Applications·Prasanta PattanayakPatit Paban Kundu
Oct 30, 2021·Chemical Reviews·Samantha R McCuskeyThuc-Quyen Nguyen

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