Oxygen Reduction Reaction with Manganese Oxide Nanospheres in Microbial Fuel Cells

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dc.citation.firstpage11777en_US
dc.citation.issueNumber14en_US
dc.citation.journalTitleACS Omegaen_US
dc.citation.lastpage11787en_US
dc.citation.volumeNumber7en_US
dc.contributor.authorVemuri, Bhuvanen_US
dc.contributor.authorChilkoor, Govindaen_US
dc.contributor.authorDhungana, Pramoden_US
dc.contributor.authorIslam, Jamilen_US
dc.contributor.authorBaride, Aravinden_US
dc.contributor.authorKoratkar, Nikhilen_US
dc.contributor.authorAjayan, Pulickel M.en_US
dc.contributor.authorRahman, Muhammad M.en_US
dc.contributor.authorHoefelmeyer, James D.en_US
dc.contributor.authorGadhamshetty, Venkataramanaen_US
dc.date.accessioned2022-04-28T14:29:03Zen_US
dc.date.available2022-04-28T14:29:03Zen_US
dc.date.issued2022en_US
dc.description.abstractOperating microbial fuel cells (MFCs) under extreme pH conditions offers a substantial benefit. Acidic conditions suppress the growth of undesirable methanogens and increase redox potential for oxygen reduction reactions (ORRs), and alkaline conditions increase the electrocatalytic activity. However, operating any fuel cells, including MFCs, is difficult under such extreme pH conditions. Here, we demonstrate a pH-universal ORR ink based on hollow nanospheres of manganese oxide (h-Mn3O4) anchored with multiwalled carbon nanotubes (MWCNTs) on planar and porous forms of carbon electrodes in MFCs (pH = 3–11). Nanospheres of h-Mn3O4 (diameter ∼ 31 nm, shell thickness ∼ 7 nm) on a glassy carbon electrode yielded a highly reproducible ORR activity at pH 3 and 10, based on rotating disk electrode (RDE) tests. A phenomenal ORR performance and long-term stability (∼106 days) of the ink were also observed with four different porous cathodes (carbon cloth, carbon nanofoam paper, reticulated vitreous carbon, and graphite felt) in MFCs. The ink reduced the charge transfer resistance (Rct) to the ORR by 100-fold and 45-fold under the alkaline and acidic conditions, respectively. The current study promotes ORR activity and subsequently the MFC operations under a wide range of pH conditions, including acidic and basic conditions.en_US
dc.identifier.citationVemuri, Bhuvan, Chilkoor, Govinda, Dhungana, Pramod, et al.. "Oxygen Reduction Reaction with Manganese Oxide Nanospheres in Microbial Fuel Cells." <i>ACS Omega,</i> 7, no. 14 (2022) American Chemical Society: 11777-11787. https://doi.org/10.1021/acsomega.1c06950.en_US
dc.identifier.digitalacsomega-1c06950en_US
dc.identifier.doihttps://doi.org/10.1021/acsomega.1c06950en_US
dc.identifier.urihttps://hdl.handle.net/1911/112183en_US
dc.language.isoengen_US
dc.publisherAmerican Chemical Societyen_US
dc.rightsThis is an open-access article distributed under the terms of the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International licenseen_US
dc.rights.urihttps://creativecommons.org/licenses/by-nc-nd/4.0/en_US
dc.titleOxygen Reduction Reaction with Manganese Oxide Nanospheres in Microbial Fuel Cellsen_US
dc.typeJournal articleen_US
dc.type.dcmiTexten_US
dc.type.publicationpublisher versionen_US
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