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Author Gacitua, M.A.; Gonzalez, B.; Majone, M.; Aulenta, F.
Title Boosting the electrocatalytic activity of Desulfovibrio paquesii biocathodes with magnetite nanoparticles Type
Year 2014 Publication International Journal Of Hydrogen Energy Abbreviated Journal Int. J. Hydrog. Energy
Volume 39 Issue 27 Pages 14540-14545
Keywords Microbial biocathode; Magnetite nanoparticles; Hydrogen generation; Microbial electrolysis; Desulfovibrio sp.
Abstract The production of reduced value-added chemicals and fuels using microorganisms as cheap cathodic electrocatalysts is recently attracting considerable attention. A robust and sustainable production is, however, still greatly hampered by a poor understanding of electron transfer mechanisms to microorganisms and the lack of strategies to improve and manipulate thereof. Here, we investigated the use of electrically-conductive magnetite (Fe3O4) nanoparticles to improve the electrocatalytic activity of a H-2-producing Desulfovibrio paquesii biocathode. Microbial biocathodes supplemented with a suspension of nanoparticles displayed increased H-2 production rates and enhanced stability compared to unamended ones. Cyclic voltammetry confirmed that Faradaic currents involved in microbially-catalyzed H-2 evolution were enhanced by the addition of the nanoparticles. Possibly, nanoparticles improve the extracellular electron path to the microorganisms by creating composite networks comprising of mineral particles and microbial cells. Copyright (C) 2014, Hydrogen Energy Publications, LLC. Published by Elsevier Ltd. All rights reserved.
Address [Gacitua, Manuel A.; Gonzalez, Bernardo] Univ Adolfo Ibanez, Ctr Appl Ecol & Sustainabil CAPES, Lab Bioingn, Fac Ingn & Ciencias, Santiago 7941169, Chile, Email: mgacitua.pdc@uai.cl;
Corporate Author Thesis
Publisher Pergamon-Elsevier Science Ltd Place of Publication Editor
Language English Summary Language Original Title
Series Editor Series Title Abbreviated Series Title
Series Volume Series Issue Edition
ISSN 0360-3199 ISBN Medium
Area Expedition Conference
Notes WOS:000341897500004 Approved
Call Number UAI @ eduardo.moreno @ Serial 414
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