Electroactive biofilms of sulphate reducing bacteria

Cristina M. Cordas; L. Tiago Guerra; Catarina Xavier; José J. G. Moura

doi:10.1016/j.electacta.2008.02.041

Electroactive biofilms of sulphate reducing bacteria

Cristina M. Cordas, L. Tiago Guerra, Catarina Xavier, José J. G. Moura

Research output: Contribution to journal › Conference article › peer-review

76 Citations (Scopus)

Abstract

Biofilms formed from a pure strain of Desulfovibrio desulfuricans 27774 on stainless steel and graphite polarised surfaces were studied. The polarisation conditions applied were -0.4 V vs. SCE for different times. A cathodic current related with the biofilms growth was observed with a maximum intensity of -270 mA m^-2 that remained stable for several days using graphite electrodes. These sulphate reducing bacteria biofilms present electrocatalytic activity towards hydrogen and oxygen reduction reactions. Electrode polarisation has a selective effect on the catalytic activity. The biofilms were also observed by scanning electronic microscopy revealing the formation of homogeneous films on the surfaces.

Original language	English
Pages (from-to)	29-34
Number of pages	6
Journal	Electrochimica Acta
Volume	54
Issue number	1(SI)
DOIs	https://doi.org/10.1016/j.electacta.2008.02.041
Publication status	Published - 1 Dec 2008
Event	International conference on biocorrosion of materials, BIOCORYS 2007 - Paris, Portugal Duration: 14 Jun 2007 → 17 Jun 2007

Keywords

Biofilms
Electrocatalysis
Electrochemistry
Hydrogenase
Sulphate reducing bacteria

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10.1016/j.electacta.2008.02.041Licence: CC BY-NC-ND

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title = "Electroactive biofilms of sulphate reducing bacteria",

abstract = "Biofilms formed from a pure strain of Desulfovibrio desulfuricans 27774 on stainless steel and graphite polarised surfaces were studied. The polarisation conditions applied were -0.4 V vs. SCE for different times. A cathodic current related with the biofilms growth was observed with a maximum intensity of -270 mA m-2 that remained stable for several days using graphite electrodes. These sulphate reducing bacteria biofilms present electrocatalytic activity towards hydrogen and oxygen reduction reactions. Electrode polarisation has a selective effect on the catalytic activity. The biofilms were also observed by scanning electronic microscopy revealing the formation of homogeneous films on the surfaces.",

keywords = "Biofilms, Electrocatalysis, Electrochemistry, Hydrogenase, Sulphate reducing bacteria",

author = "Cordas, {Cristina M.} and Guerra, {L. Tiago} and Catarina Xavier and Moura, {Jos{\'e} J. G.}",

year = "2008",

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language = "English",

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journal = "Electrochimica Acta",

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T1 - Electroactive biofilms of sulphate reducing bacteria

AU - Cordas, Cristina M.

AU - Guerra, L. Tiago

AU - Xavier, Catarina

AU - Moura, José J. G.

PY - 2008/12/1

Y1 - 2008/12/1

N2 - Biofilms formed from a pure strain of Desulfovibrio desulfuricans 27774 on stainless steel and graphite polarised surfaces were studied. The polarisation conditions applied were -0.4 V vs. SCE for different times. A cathodic current related with the biofilms growth was observed with a maximum intensity of -270 mA m-2 that remained stable for several days using graphite electrodes. These sulphate reducing bacteria biofilms present electrocatalytic activity towards hydrogen and oxygen reduction reactions. Electrode polarisation has a selective effect on the catalytic activity. The biofilms were also observed by scanning electronic microscopy revealing the formation of homogeneous films on the surfaces.

AB - Biofilms formed from a pure strain of Desulfovibrio desulfuricans 27774 on stainless steel and graphite polarised surfaces were studied. The polarisation conditions applied were -0.4 V vs. SCE for different times. A cathodic current related with the biofilms growth was observed with a maximum intensity of -270 mA m-2 that remained stable for several days using graphite electrodes. These sulphate reducing bacteria biofilms present electrocatalytic activity towards hydrogen and oxygen reduction reactions. Electrode polarisation has a selective effect on the catalytic activity. The biofilms were also observed by scanning electronic microscopy revealing the formation of homogeneous films on the surfaces.

KW - Biofilms

KW - Electrocatalysis

KW - Electrochemistry

KW - Hydrogenase

KW - Sulphate reducing bacteria

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DO - 10.1016/j.electacta.2008.02.041

M3 - Conference article

AN - SCOPUS:52949096839

SN - 0013-4686

VL - 54

SP - 29

EP - 34

JO - Electrochimica Acta

JF - Electrochimica Acta

IS - 1(SI)

T2 - International conference on biocorrosion of materials, BIOCORYS 2007

Y2 - 14 June 2007 through 17 June 2007

ER -

Electroactive biofilms of sulphate reducing bacteria

Abstract

Keywords

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