Sur le comportement anodique du Cuivre II.‐Influence de la densité de courant en milieu alcalin

Brouckère, Lucia De; Bouillon, Florent; Bouillon‐Nyssen, Y.

doi:10.1002/bscb.19510600105

Cited by 15 publications

(15 citation statements)

References 7 publications

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“…As a consequence of this we felt that an extension some of our previous work (6) on the transition metal oxides with respect to the energy levels and chemistry in the cell would be of value in understanding the wet photovoltaic cells. One can illustrate the general schematic for the energy levels in the typical cell as is shown in Fig.…”

Section: Discussionmentioning

confidence: 95%

“…Thus experimental data may only be obtained over the inter- Replacing i(t) in Eq. [6] by ig demonstrates that E has a minimum (Emln) when S = V2. The time taken to achieve this minimum (tmin) is thus obtained trivially from Eq.…”

Section: Polycrystalline Copper Electrodes--cyclicmentioning

confidence: 97%

“…[5] is the appropriate basis for the potentiostatic-to-galvanostatic transformation. Equation [5] may be rewritten i(t) = 4ira(S) (1 --S) [6] where im is the maximum of the potentiostatic current-time transient and S is the surface coverage function (0 ~ S ~ 1). If it is assumed that im and tm are exponential functions of potential, then ir~ = (nFkJ4) : 10 a~'+~ [7] tm = (p2 9 in (2)/GM~k12No) : 10 a*'E+b2 [8] Equations [5]- [8] may be regarded as a set of differential equations specifying i as a function of t for various E in the case of three-dimensional instantaneous nucleation.…”

Section: Polycrystalline Copper Electrodes--cyclicmentioning

confidence: 99%

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The Anodic Oxidation of Copper Amalgam and Polycrystalline Copper Electrodes in LiOH Solution

Fletcher

Barradas

Porter

1978

J. Electrochem. Soc.

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The anodie behavior of copper in lithium hydroxide solution was investigated at room temperature under controlled potential conditions. The electrodes were either saturated copper amalgams or small polycrystalline wires. Particular attention was focused on the copper (I) region. Two layerplanes of Cu~O were formed at anodic overpotentials following the dissolution of copper (I) hydroxy complexes on the COl~per amalgam electrodes. Some novel data are reported concerning the nucleation of holes in these layers during the reverse reaction. Behavior analogous to that of the amalgam electrodes was observed on the polycrystalline electrodes, except that a thick layer of Cu20 was also formed On top of the previously formed layer-planes. A model is proposed for the growth of this thick layer, and it is demonstrated that this model also describes the galvanostatic data acquired by earlier workers.* Electrochemical Society Active Member. ** Electrochemical Society Student Member.

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Section: Discussionmentioning

confidence: 95%

Section: Polycrystalline Copper Electrodes--cyclicmentioning

confidence: 97%

Section: Polycrystalline Copper Electrodes--cyclicmentioning

confidence: 99%

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The Anodic Oxidation of Copper Amalgam and Polycrystalline Copper Electrodes in LiOH Solution

Fletcher

Barradas

Porter

1978

J. Electrochem. Soc.

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“…It is generally considered that cuprous oxide, Cu20, is the first product of the anodic oxidation of copper in alkaline solutions (1)(2)(3)(4)(5)(6)(7)(8)(9)(10)(11)(12)(13)(14). In the case of electrochemical reaction in aqueous sodium hydroxide this has been confirmed by electron diffraction (5).…”

mentioning

confidence: 89%

“…More importance has been attached to the formation of copper(II) species during subsequent electrochemical oxidation reactions. According to the various sources, cupric oxide, CuO (2,5,6,8,9), cupric hydroxide, Cu(OH)2 (3)(4)(5)(6)(7)(8), and a soluble species thought to be the bicuprite anion, HCuO~- (7,10), may be formed. Nevertheless, there appear to be several conflicting opinions in the literature as to whether these divalent species form in consecutive or concurrent electrode reactions.…”

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confidence: 99%

The Anodic Formation of Cu2 O in Alkaline Solutions

Ashworth

Fairhurst

1977

J. Electrochem. Soc.

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Chronopotentiometry has been used in conjunction with electron microsscopy to investigate the anodic formation of Cu2O on copper electrodes immersed in aqueous sodium hydroxide solutions (0.01–1M). The anodic transition time τ for Cu2O formation is related to the applied current density, i1 , by the relationshipi1τ1/2=normala constantA nucleation and growth model of film formation is proposed which is in good agreement with the experimental results. The rate‐determining step is the formation of a soluble copper(I) species, film growth taking place by precipitation from solution.

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Sur l'oxydation sèche du cuivre et de ses alliages I, Influence de la température sur l'oxydation isochrone du cuivre pur

Bouillon

1951

Bulletin des Soc Chimique

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Sur l'oxydation si?che du cuivre et de ses alliages I. Influencc de la tempbratwe sur I'oxydation isochroiic du cuivre pur F. BOUILLON (Bruxelles) SC'MMAHY. --Elcctropolished samples of copper were kept in contact with dry oxygen under atmospheric pressure, a t temperatures ranging from 1000 to 9000 C.These were all examined under the microscope, by electron diffraction and in some L'BSCS by X ray, diffraction and with .an' electron microscope. They were also analyshed qualitatively and quantitatively, by Miley's clertrochemical method.It was shown that the direct oxidation of copper always ledd to cuprous oxide Cu,O. .4t temperatures higher than 224O C cuprous oxide was in its turn oxidized to cupric oxide CuO. Above 3 1 V C the rate of oxidation was so great that cuprous oxide could no longer be detected in the films.It appeared also that the first layers of cuprous oxide had a strong [111] orientation, which disappeared as soon as film thickness reached about 7 W A . At first 'it was randomly orientated, but recrystallized as it thickened, and finally showed, in very thick films, a very marked orientation.Finally i t was shown that the beginning of scalling coincided with the first appearance of cupric oxide but disapeared for temperatures higher than 8 O O o C .Oxide films were formed.Cupric oxide behaved in a quite different manner.

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Sur le comportement anodique du Cuivre II.‐Influence de la densité de courant en milieu alcalin

Abstract: 3) M. I'M IIBAIX. Thermodynamique des solutions uqueiises dilutes. (4) F. BOUILLON. c'e reruril 59, fiB0, (1950). Delft 1945.

Cited by 15 publications

References 7 publications

The Anodic Oxidation of Copper Amalgam and Polycrystalline Copper Electrodes in LiOH Solution

The Anodic Oxidation of Copper Amalgam and Polycrystalline Copper Electrodes in LiOH Solution

The Anodic Formation of Cu2 O in Alkaline Solutions

Sur l'oxydation sèche du cuivre et de ses alliages I, Influence de la température sur l'oxydation isochrone du cuivre pur

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