Über einige Anwendungen der rotierenden Scheibenelektrode

Landsberg, R.; Geissler, W.; Müller, Siegfried

doi:10.1002/zfch.19610010603

Cited by 25 publications

(3 citation statements)

References 4 publications

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“…In Table V, the calculated diffusion coefficients for H + ͑aq͒ in cobalt chloride and in sodium chloride were of the same order of magnitude. The value for D H + ͑aq͒ in sodium chloride given in Table V agrees well with literature data 13 when the temperature is taken into account. This shows that the low values of D H + ͑aq͒ are derived only during the simultaneous deposition of cobalt.…”

Section: D338supporting

confidence: 88%

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Mass Transfer of Protons during Electrodeposition of Cobalt in Chloride Electrolytes

Kongstein

Haarberg

Thonstad

2010

J. Electrochem. Soc.

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In acid cobalt chloride electrolytes, the electrodeposition of cobalt and the evolution of hydrogen take place simultaneously. On a rotating platinum disk electrode, the current efficiency for cobalt deposition was calculated based on the anodic charge needed for stripping of the cobalt deposits divided by the total cathodic charge. The results showed a decrease in current efficiency with increasing rotation rate. From the partial current density for hydrogen evolution, the diffusion coefficient for protons was calculated. The derived diffusion coefficients varied with overpotential and pH but were always 1 order of magnitude lower compared to what was expected from literature values. This was attributed to water drag when transporting cobalt ions toward the electrode. The variations in the calculated diffusion coefficients were explained by the change in the transfer number when the proton concentration was changed and in the potential gradient when the potential was varied.

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Section: D338supporting

confidence: 88%

“…Diffusion coefficients for hydrogen ions have been measured by various techniques and by many authors. Landsberg et al 13 measured the D H + ͑aq͒ in different concentrations of KCl͑aq͒ at a rotating disk electrode and found the value in 1 M KCl to be 7.2 ϫ 10 −9 m 2 s at 25°C.…”

Section: Table II Calculated Values For the Tafel Kinetics For Electr...mentioning

confidence: 99%

Mass Transfer of Protons during Electrodeposition of Cobalt in Chloride Electrolytes

Kongstein

Haarberg

Thonstad

2010

J. Electrochem. Soc.

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“…Diffusion coefficients for hydrogen ions have been measured by various techniques and by many authors. Landsberg et al [14] measured the D H+ (aq) in different concentrations of KCl(aq) at a rotating disc electrode, and found the value in 1 M KCl to be 7.2 •10 -9 m 2 s at 25 °C.…”

Section: Ecs Transactions 33 (34) 3-17 (2011)mentioning

confidence: 99%

Proton Transport during Electrodeposition of Cobalt in Chloride Electrolytes

2011

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In acid cobalt chloride electrolytes the electrodeposition of cobalt and evolution of hydrogen take place simultaneously. On a rotating platinum disc electrode the current efficiency for cobalt deposition was calculated based on the anodic charge needed for stripping of the cobalt deposits divided by the total cathodic charge. The results showed a decrease in current efficiency with increasing rotation rate. From the partial current density for hydrogen evolution the diffusion coefficient for protons was calculated. The derived diffusion coefficients varied with overpotential and pH, but were always one order of magnitude lower compared to what was expected from literature values. This was attributed to water drag when transporting cobalt ions towards the electrode. The variations in the calculated diffusion coefficients were explained by change in the transfer number when the proton concentration was changed.

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Über die kathodische Reduktion yon Wasserstoffperoxid an Graphitelektroden

Landsberg

1966

Ber Bunsenges Phys Chem

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Es warden stationäre Strom‐Spannungs‐Kurven für die H2O2‐Reduktion an einer rotierenden Scheibenelektrode aus paraffiniertem Graphit aufgenommen. Aus der Analyse der erhaltenen Kurven konnte auf eine pH‐abhängige Oberflächenbedeckung der Elektrode geschlossen werden. Die effektiv elektrochemisch wirksame Elektrodenoberfläche wurde quantitativ erfaßt, und die Radien der aktiven Bereiche konnten abgeschätzt werden. Es wurden die elektrochemischen Reaktionsordnungen Z(H2O2) = 1 und Z(H+) =f(pH) sowie der Durchtrittsfaktor β = 0,1 bis 0,2 bestimmt. Für die H2O2‐Reduktion wurden zwei Mechanismen für das saure Medium einerseits und für das alkalische Medium andererseits vorgeschlagen.

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Über einige Anwendungen der rotierenden Scheibenelektrode

Cited by 25 publications

References 4 publications

Mass Transfer of Protons during Electrodeposition of Cobalt in Chloride Electrolytes

Mass Transfer of Protons during Electrodeposition of Cobalt in Chloride Electrolytes

Proton Transport during Electrodeposition of Cobalt in Chloride Electrolytes

Über die kathodische Reduktion yon Wasserstoffperoxid an Graphitelektroden

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