TY - JOUR
T1 - Influence of anode surface chemistry on microbial fuel cell operation
AU - Santoro, Carlo
AU - Babanova, Sofia
AU - Artyushkova, Kateryna
AU - Cornejo, Jose A.
AU - Ista, Linnea
AU - Bretschger, Orianna
AU - Marsili, Enrico
AU - Atanassov, Plamen
AU - Schuler, Andrew J.
N1 - Funding Information:
This project is funded by the Army Research Office Award W911NF-12-1-0208 .
Publisher Copyright:
© 2015 Elsevier B.V.
PY - 2015/12/1
Y1 - 2015/12/1
N2 - Self-assembled monolayers (SAMs) modified gold anodes are used in single chamber microbial fuel cells for organic removal and electricity generation. Hydrophilic (N(CH3)3+, OH, COOH) and hydrophobic (CH3) SAMs are examined for their effect on bacterial attachment, current and power output. The different substratum chemistry affects the community composition of the electrochemically active biofilm formed and thus the current and power output. Of the four SAM-modified anodes tested, N(CH3)3+ results in the shortest start up time (15days), highest current achieved (225μAcm-2) and highest MFC power density (40μWcm-2), followed by COOH (150μAcm-2 and 37μWcm-2) and OH (83μAcm-2 and 27μWcm-2) SAMs. Hydrophobic SAM decreases electrochemically active bacteria attachment and anode performance in comparison to hydrophilic SAMs (CH3 modified anodes 7μAcm-2 anodic current and 1.2μWcm-2 MFC's power density). A consortium of Clostridia and δ-Proteobacteria is found on all the anode surfaces, suggesting a synergistic cooperation under anodic conditions.
AB - Self-assembled monolayers (SAMs) modified gold anodes are used in single chamber microbial fuel cells for organic removal and electricity generation. Hydrophilic (N(CH3)3+, OH, COOH) and hydrophobic (CH3) SAMs are examined for their effect on bacterial attachment, current and power output. The different substratum chemistry affects the community composition of the electrochemically active biofilm formed and thus the current and power output. Of the four SAM-modified anodes tested, N(CH3)3+ results in the shortest start up time (15days), highest current achieved (225μAcm-2) and highest MFC power density (40μWcm-2), followed by COOH (150μAcm-2 and 37μWcm-2) and OH (83μAcm-2 and 27μWcm-2) SAMs. Hydrophobic SAM decreases electrochemically active bacteria attachment and anode performance in comparison to hydrophilic SAMs (CH3 modified anodes 7μAcm-2 anodic current and 1.2μWcm-2 MFC's power density). A consortium of Clostridia and δ-Proteobacteria is found on all the anode surfaces, suggesting a synergistic cooperation under anodic conditions.
KW - Anode biofilm analysis
KW - Bioelectrocatalysis
KW - Microbial fuel cells
KW - Self assembled monolayer
KW - Surface modification
UR - http://www.scopus.com/inward/record.url?scp=84940786342&partnerID=8YFLogxK
U2 - 10.1016/j.bioelechem.2015.05.002
DO - 10.1016/j.bioelechem.2015.05.002
M3 - Article
C2 - 26025340
AN - SCOPUS:84940786342
SN - 1567-5394
VL - 106
SP - 141
EP - 149
JO - Bioelectrochemistry
JF - Bioelectrochemistry
ER -
