Hydrogen evolution in aqueous solutions containing dissolved CO2: Quantitative contribution of the buffering effect

Remita, E.; Tribollet, Bernard; Sutter, Éliane; Vivier, Vincent; Ropital, F.; Kittel, Jean

doi:10.1016/j.corsci.2007.12.007

Cited by 118 publications

(86 citation statements)

References 20 publications

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“…While direct reduction of H 2 CO 3 remained the most often cited mechanism until the late 2000's, a recent consensus seems adopted on the buffer effect which was first proposed in 1974 [12]. This mechanism was recently confirmed by a reactive transport model showing that no additional reduction reaction was necessary to describe cathodic reactions in CO 2 solutions [14]. Similarly, recent 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 studies on acetic acid corrosion also showed that a direct reduction was not likely [15], also confirming older thoughts [3].…”

Section: Introductionmentioning

confidence: 76%

Corrosion mechanisms in aqueous solutions containing dissolved H2S. Part 2: Model of the cathodic reactions on a 316L stainless steel rotating disc electrode

Tribollet

Kittel

Meroufel

et al. 2014

Electrochimica Acta

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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 Corrosion mechanisms in aqueous solutions containing dissolved H 2 S. Part 2: Model of the cathodic reactions on a 316L stainless steel rotating disc electrode. AbstractIn H 2 S containing solutions, the reduction of protons with a buffer effect contributing to the transport of protons at the steel surface, is not sufficient to explain the cathodic polarization curves obtained on 316L stainless steel. An additional electrochemical reaction was observed and was attributed to a direct H 2 S reduction. A numerical model is presented with these hypotheses and a good agreement is found with the experimental data presented in a previous paper. With this model it is also possible to present the concentration profiles of the different species involved in the cathodic process.

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Section: Introductionmentioning

confidence: 76%

Corrosion mechanisms in aqueous solutions containing dissolved H2S. Part 2: Model of the cathodic reactions on a 316L stainless steel rotating disc electrode

Tribollet

Kittel

Meroufel

et al. 2014

Electrochimica Acta

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“…This effect was more marked after 15 h of immersion. After 2 h of immersion, a well-defined current plateau was reached which is ascribed to the mass transport limitation of the proton reduction reaction [9,10]. To have a better understanding of the influence of flow on the electrode kinetics, I was plotted against Ω 1/2 over the cathodic domain at a potential of -0.87 V/SCE (Fig.…”

Section: Surface Analysismentioning

confidence: 99%

Electrochemical Investigation of the Corrosion Behavior of API 5L-X65 Carbon Steel in Carbon Dioxide Medium

Henríquez¹,

Pébère²,

Ochoa³

et al. 2013

Corrosion

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International audienceThe corrosion behavior of API 5L-X65 carbon steel in a carbon dioxide (CO2)-saturated solution was investigated by electrochemical measurements (polarization curves, Levich plots, and electrochemical impedance spectroscopy) with a rotating disk electrode. Different experimental conditions such as hydrodynamics, immersion time, and temperature were considered. From the polarization curves, it was shown that both the anodic and cathodic current densities decreased as the electrode rotation speed, the immersion time, and the temperature increased. This behavior was in agreement with the impedance results obtained at the corrosion potential. It was shown that the corrosion processes were initially controlled by mass transport but they became under activation control for longer immersion times. Scanning electron microscopy was used to characterize the corrosion products. For short immersion times (2 h and 6 h), the corrosion products mainly deposited on the cathodic sites (pearlitic zones) of the carbon steel surface forming a heterogeneous layer, whereas they covered the whole electrode surface after longer periods (>15 h). At a microscale, localized corrosion, as a result of galvanic coupling between pearlite and ferrite, was also observed

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“…Their analysis considered the homogeneous reaction involving water and hydroxide, bicarbonate, and carbonate ions. Remita et al 7 have shown that, for a deaerated aqueous electrolyte containing dissolved carbon dioxide, hydrogen evolution is enhanced by the homogeneous dissociation of CO 2 . Tran et al 8 demonstrated that homogeneous dissociation of acetic acid enhances cathodic reduction of hydronium ions.…”

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confidence: 99%

The Influence of Homogeneous Reactions on the Impedance Response of a Rotating Disk Electrode

Harding

Tribollet

Vivier

et al. 2017

J. Electrochem. Soc.

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A mathematical model was developed for the impedance response associated with coupled homogeneous chemical and heterogeneous electrochemical reactions. The model includes a homogeneous reaction in the electrolyte in which species AB reacts reversibly to form A − and B + and B + reacts electrochemically on a rotating disk electrode to produce B. The resulting diffusion impedance has two asymmetric capacitive loops, one associated with convective diffusion and the other with the homogeneous reaction. For an infinitely fast homogeneous reaction, the system is shown to behave as though AB is the electroactive species. A modified Gerischer impedance was found to provide a good fit to the simulated data. The coupling of homogeneous chemical reactions and heterogeneous electrochemical reactions has drawn substantial interest over the past 80 years. Koutecky and Levich 1-3 developed a steady-state model for a homogeneous reaction coupled with an electrochemical reaction on a rotating disk electrode. The homogenous reaction was assumed to follow linear kinetics, all diffusion coefficients were assumed to be equal, and the Schmidt number was assumed infinite. Koutecky and Levich defined a characteristic dimension for the homogeneous reaction, termed the thickness of the kinetic layer and represented bywhere α = k f +k b , k f and k b are respectively the forward and backward rate constants of the homogeneous reaction, and D is the diffusion coefficient. Bossche et al. 4 describe finite-difference calculations under assumption of a steady state for an electrochemical system controlled by diffusion, migration, convection, and nonlinear homogeneous reaction kinetics. Their convection term used a three-term expansion appropriate for positions close to the electrode surface.5 Deslouis et al. 6 used a submerged impinging jet cell to measure interfacial pH during the reduction of dissolved oxygen in the presence of carbonate. Their analysis considered the homogeneous reaction involving water and hydroxide, bicarbonate, and carbonate ions. Remita et al. 7 have shown that, for a deaerated aqueous electrolyte containing dissolved carbon dioxide, hydrogen evolution is enhanced by the homogeneous dissociation of CO 2 . Tran et al. 8 demonstrated that homogeneous dissociation of acetic acid enhances cathodic reduction of hydronium ions. Smith 9,10 used AC Polarography to study different linear firstorder homogeneous reaction mechanisms, including preceding, following, and catalytic chemical reactions coupled with electrochemical reactions. Jurczakowski and Polczynski 11 developed an AC model with coupled homogenous and heterogeneous reactions accounting for cases where diffusion coefficients are not considered to be equal. The above mechanisms assumed simplified homogeneous reactions, with a maximum of two species considered.Using chronopotentiometry, Delahay and Berzins 12 showed that cadmium cyanide complexes undergo a dissociation before electrore- * Electrochemical Society Student Member. * * Electrochemical Society Fellow. * * * ...

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Hydrogen evolution in aqueous solutions containing dissolved CO2: Quantitative contribution of the buffering effect

Cited by 118 publications

References 20 publications

Corrosion mechanisms in aqueous solutions containing dissolved H2S. Part 2: Model of the cathodic reactions on a 316L stainless steel rotating disc electrode

Corrosion mechanisms in aqueous solutions containing dissolved H2S. Part 2: Model of the cathodic reactions on a 316L stainless steel rotating disc electrode

Electrochemical Investigation of the Corrosion Behavior of API 5L-X65 Carbon Steel in Carbon Dioxide Medium

The Influence of Homogeneous Reactions on the Impedance Response of a Rotating Disk Electrode

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