Studies of the electrodeposition of cobalt on a vitreous carbon electrode

Bertazzoli, Rodnei; Sousa, Maria de Fátima Pinto

doi:10.1590/s0103-50531997000400007

Cited by 25 publications

(15 citation statements)

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“…Bertazzoli et al [13] and Ragnini et al [7] reported the values of 2.0 Â 10 )5 cm 2 s )1 and 7.0 Â 10 )5 cm 2 s )1 , respectively, for Pb(II) in electrolytes similar to the one used in this work. The diffusion coefficient of Cu(II) in sulphate medium is 4.9 Â 10 )5 cm 2 s )1 [21] and the value of 4.0 Â 10 )5 cm 2 s )1 was reported for Co(II) in the same medium [22].…”

Section: Cyclic Voltammetrymentioning

confidence: 62%

Removal of Pb(II) from simulated wastewaters using a stainless-steel wool cathode in a flow-through cell

et al. 2006

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The investigation of an electrolytic process to remove Pb(II) from simulated wastewaters using a stainless-steel wool (SSW) cathode in a flow-through cell under potentiostatic condition is reported. Voltammetry under hydrodynamic conditions was used to estimate the diffusion coefficient, which was found to be 1.4 Â 10 )5 cm 2 s )1 in the supporting electrolyte (0.10 mol l )1 NaNO 3 and 0.10 mol l )1 H 3 BO 3 , pH 4.8). The performance of the flow-through cell was evaluated for three potentials: )0.70, )0.80 and )0.90 V vs. saturated calomel electrode (SCE). At )0.70 V, the reaction was found not to be completely controlled by mass transfer, while at )0.80 V and )0.90 V the Pb(II) concentration decayed exponentially. At )0.90 V, using a flow rate of 250 l h )1 , after a 90-min electrolysis, the Pb(II) concentration decayed from 50 ppm to only 1 ppm, corresponding to a 98% removal.

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Section: Cyclic Voltammetrymentioning

confidence: 62%

Removal of Pb(II) from simulated wastewaters using a stainless-steel wool cathode in a flow-through cell

et al. 2006

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“…At pH 4.5 the nucleation mechanism is 3D progressive. In sulfate solution, pH 6, that Co deposition consistent with the progressive nucleation model followed by 3D diffusionlimited growth [9]. However, in mixed chloride sulfate solution a transition from progressive to instantaneous nucleation mechanism was established for Co deposition on Pt and Au(1 1 1) substrates at pH 4.2 and [10,11].…”

Section: Introductionmentioning

confidence: 72%

“…Co and its alloys are eligible materials for application in opto-electronic and magnetic devices [1][2][3][4]. Electrochemical Co film growth on various substrates and experimental conditions has been widely studied [5][6][7][8][9][10][11]. A progressive nucleation mode was established in chloride baths, for the electrocrystallization of Co on carbon and gold substrates [5,6].…”

Section: Introductionmentioning

confidence: 99%

Electrochemical nucleation and growth of Co and CoFe alloys on Pt/Si substrates

et al. 2006

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“…Moreover, NH 4 + ions may preferentially adsorb on certain orientations too, delaying the nucleation rate. 26 It has been proposed that the diffusion-limited 3D growth of metallic centers can be predicted by: 27 (4) where:…”

Section: Choronoamperometric Studymentioning

confidence: 99%

Electrochemical study about zinc electrodeposition onto GCE and HOPG substrates

Granados-Ner¹,

Mendoza-Huízar²,

Ríos-Reyes³

2011

Quím. Nova

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We carried out an electrochemical study about zinc electrodeposition onto GCE and HOPG substrates from an electrolytic plating bath containing 0.01M ZnSO 4 + 1M (NH 4 ) 2 SO 4 at pH 7. Under our experimental conditions the predominant chemical species was the complex [ZnSO 4 (H 2 O) 5 ]. The chronoamperometric study showed that zinc electrodeposition follows a typical 3D nucleation mechanism in both substrates. The average ΔG calculated for the stable nucleus formation was 6.92 x 10 -21 J nuclei −1 and 1.35 x 10 -20 J nuclei −1 for GCE and HOPG, respectively. The scanning electron microscopy (SEM) images showed different nucleation and growth processes on GCE and HOPG substrates at same overpotential.

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Studies of the electrodeposition of cobalt on a vitreous carbon electrode

Cited by 25 publications

References 0 publications

Removal of Pb(II) from simulated wastewaters using a stainless-steel wool cathode in a flow-through cell

Removal of Pb(II) from simulated wastewaters using a stainless-steel wool cathode in a flow-through cell

Electrochemical nucleation and growth of Co and CoFe alloys on Pt/Si substrates

Electrochemical study about zinc electrodeposition onto GCE and HOPG substrates

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