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Open AccessArticle

Biohybrid Cathode in Single Chamber Microbial Fuel Cell

1
Department of Applied Science and Technology, Politecnico di Torino, 10129 Torino, Italy; [email protected]
2
Center for Sustainable Future Technologies @POLITO, Istituto Italiano Di Tecnologia, 10144 Torino, Italy
3
BioRobotics Institute, Scuola Superiore Sant’Anna, 56127 Pisa, Italy
4
Center for Micro-BioRobotics @ SSSA, Istituto Italiano di Tecnologia (IIT), Pontedera, 56025 Pisa, Italy
*
Authors to whom correspondence should be addressed.
Nanomaterials 2019, 9(1), 36; https://doi.org/10.3390/nano9010036
Received: 3 December 2018 / Revised: 19 December 2018 / Accepted: 24 December 2018 / Published: 28 December 2018
The aim of this work is to investigate the properties of biofilms, spontaneously grown on cathode electrodes of single-chamber microbial fuel cells, when used as catalysts for oxygen reduction reaction (ORR). To this purpose, a comparison between two sets of different carbon-based cathode electrodes is carried out. The first one (Pt-based biocathode) is based on the proliferation of the biofilm onto a Pt/C layer, leading thus to the creation of a biohybrid catalyst. The second set of electrodes (Pt-free biocathode) is based on a bare carbon-based material, on which biofilm grows and acts as the sole catalyst for ORR. Linear sweep voltammetry (LSV) characterization confirmed better performance when the biofilm is formed on both Pt-based and Pt-free cathodes, with respect to that obtained by biofilm-free cathodes. To analyze the properties of spontaneously grown cathodic biofilms on carbon-based electrodes, electrochemical impedance spectroscopy is employed. This study demonstrates that the highest power production is reached when aerobic biofilm acts as a catalyst for ORR in synergy with Pt in the biohybrid cathode. View Full-Text
Keywords: single chamber microbial fuel cell; biohybrid catalyst; oxygen reduction reaction (ORR); electrochemical impedance spectroscopy (EIS) single chamber microbial fuel cell; biohybrid catalyst; oxygen reduction reaction (ORR); electrochemical impedance spectroscopy (EIS)
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MDPI and ACS Style

Massaglia, G.; Fiorello, I.; Sacco, A.; Margaria, V.; Pirri, C.F.; Quaglio, M. Biohybrid Cathode in Single Chamber Microbial Fuel Cell. Nanomaterials 2019, 9, 36.

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