Electron transfer between hydrogenase and 316L stainless steel: identification of a hydrogenase-catalyzed cathodic reaction in anaerobic mic

Silva, Serge Da; Basseguy, Régine; Bergel, Alain

doi:10.1016/j.jelechem.2003.07.005

Cited by 62 publications

(35 citation statements)

References 40 publications

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“…The involvement of the enzyme hydrogenase, which is produced by some SRB, has been often suspected and discussed [6,7,[19][20][21][22]]. Bryant and Laishley described exciting experiments performed with pure hydrogenase [23].…”

Section: Discussionmentioning

confidence: 99%

“…Stainless steel electrodes were made up from the same stainless steel grid and pre-treated thoroughly in the same conditions in order to obtain the more suitable results. Previous works [6,7] using chrono-amperometry technique showed that the electrode surface states after the electroreduction of oxides (at À0.65 V/SCE during 15 min) were totally identical. Following results were obtained from experiments performed with the same treatment conditions and presented with deviations.…”

Section: L Stainless Steel Grid Electrodementioning

confidence: 92%

“…Before curve recording, a 5-min electrolysis was performed at À0.50 V/SCE for each phosphate concentration: (a) 25 mM, (b) 50 mM, (c) 75 mM and (d) 100 mM of potassium phosphate. [6]. The potential was then scanned at the chosen rate from À0.65 to À1.50 V/SCE.…”

Section: L Stainless Steel Grid Electrodementioning

confidence: 99%

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Electrochemical deprotonation of phosphate on stainless steel

Silva

Basseguy

Bergel

2004

Electrochimica Acta

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Voltammetric experiments performed in phosphate buffer at constant pH 8.0 on platinum and stainless steel revealed clear reduction currents, which were correlated to the concentrations of phosphate. On the basis of the reactions proposed previously, a model was elaborated, assuming that both H 2 PO 4 À and HPO 4 2À underwent cathodic deprotonation, and including the acid-base equilibriums. A kinetic model was derived by analogy with the equations generally used for hydrogen evolution. Numerical fitting of the experimental data confirmed that the phosphate species may act as an efficient catalyst of hydrogen evolution via electrochemical deprotonation. This reaction may introduce an unexpected reversible pathway of hydrogen formation in the mechanisms of anaerobic corrosion. The possible new insights offered by the electrochemical deprotonation of phosphate in microbially influenced corrosion was finally discussed.

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Section: Discussionmentioning

confidence: 99%

Section: L Stainless Steel Grid Electrodementioning

confidence: 92%

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Electrochemical deprotonation of phosphate on stainless steel

Silva

Basseguy

Bergel

2004

Electrochimica Acta

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“…The mechanisms proposed to explain anaerobic MIC by SRB include: precipitation of iron sulphide, which next catalyzes proton reduction into molecular hydrogen and acts as a cathode in a galvanic couple with metallic iron [10][11][12]; catalysis of the reduction reaction by a hydrogenase enzyme coming from the bacteria [13]; anodic depolarization resulting from the local acidification at the anode [14]; metal ion chelating by extra cellular polymer substances (EPS) [15] and galvanic coupling with EPS [16]. Some authors have proposed oxygen as the terminal electron acceptor in a more complete model considering various effects of SRB metabolism on steel surfaces in a mixed aerobic/anaerobic system [17][18][19][20][21].…”

Section: Phosphates Srb and Hydrogenase In Anaerobic Biocorrosionmentioning

confidence: 99%

Role of the reversible electrochemical deprotonation of phosphate species in anaerobic biocorrosion of steels

2007

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Sulphate reducing bacteria are known to play a major role in anaerobic microbiological influenced corrosion of steels, but mechanisms behind their influence are still source of debates as certain phenomena remain unexplained. Some experiments have shown that hydrogen consumption by SRB or hydrogenase increased the corrosion rate of mild steel. This was observed only in the presence of phosphate species. Here the cathodic behaviour of phosphate species on steel was studied to elucidate the role of phosphate in anaerobic corrosion of steel. Results showed: a linear correlation between reduction waves in linear voltammetry and phosphate concentration at a constant pH value; that phosphate ions induced considerable anaerobic corrosion of mild steel, which was sensitive to hydrogen concentration in the solution; and that the corrosion potential of stainless steel in presence of phosphate was shifted to more negative values as molecular hydrogen was added to the atmosphere in the reaction vessel. Phosphate species, and possibly other weak acids present in biofilms, are suggested to play an important role in the anaerobic corrosion of steels via a reversible mechanism of electrochemical deprotonation that may be accelerated by hydrogen removal.

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“…nanowires) [11]. It is well-known that the presence of microorganisms can influence the corrosion rate [6,[15][16][17][18][19], but is not well elucidated if IRB are able to induce local corrosion. The overall influence of microorganism on corrosion mechanism is still under debate since it depends on many factors [6].…”

Section: Introductionmentioning

confidence: 99%

Influence of hydrogen-oxidizing bacteria on the corrosion of low carbon steel: Local electrochemical investigations

Moreira

Schütz

Libert

et al. 2014

Bioelectrochemistry

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Low carbon steel has been considered a suitable material for component of the multi-barrier system employed on the geological disposal of high-level radioactive waste (HLW). A non negligible amount of dihydrogen (H 2 ) is expected to be produced over the years within the geological repository due to the anoxic corrosion of metallic materials and also due to the water radiolysis. The influence of the activity of hydrogen-oxidizing bacteria (HOB) and ironreducing bacteria (IRB) on carbon steel corrosion is considered in this study because of the high availability of energetic nutriments (H 2 , iron oxides and hydroxides) produced in anoxic disposal conditions. Local electrochemical techniques were used for investigating the activity of IRB as a promoter of local corrosion in presence of H 2 as electron donor. A local consumption of H 2 by the bacteria has been evidenced and impedance measurements indicate the formation of a thick layer of corrosion products.

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Electron transfer between hydrogenase and 316L stainless steel: identification of a hydrogenase-catalyzed cathodic reaction in anaerobic mic

Cited by 62 publications

References 40 publications

Electrochemical deprotonation of phosphate on stainless steel

Electrochemical deprotonation of phosphate on stainless steel

Role of the reversible electrochemical deprotonation of phosphate species in anaerobic biocorrosion of steels

Influence of hydrogen-oxidizing bacteria on the corrosion of low carbon steel: Local electrochemical investigations

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