Zum anodische verhalten von gold und kupfer in salzsäure

Just, G.; Landsberg, R.

doi:10.1016/0013-4686(64)80067-0

Cited by 16 publications

(10 citation statements)

References 14 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…At ca. 0.99 V gold dissolution occurs principally as Au(III) in good agreement with previous coulometric data [2,3,15]. The Au(III) concentration in solution increases during repetitive potential scanning.…”

Section: Potentiodynamic Eli Curves Run With a Single Symmetric Triansupporting

confidence: 91%

“…15), where I L is the extrapolated limiting The RDE data indicate that the rate of gold electrodissolution in C1--ion containing solutions fits, within the concentration range investigated, a 1st order dependence with respect to Cl-ion concentration (Fig. 16) instead of a 2nd order dependence as it has been claimed [2]. The separation between the anodic and the cathodic current peaks observed in the potential region of gold electrodissolution and electrodeposition, increases with the Cl -ion concentration and concomitantly, the anodic to cathodic charge ratio increases.…”

Section: The Potential Region Of Gold Electrodissolution and Electrodmentioning

confidence: 55%

“…Data previously reported by other authors about Epass dependence on Ccn_ are also included in Fig. 20 [2].…”

Section: The Passivity Regionmentioning

confidence: 96%

“…Accordingly when Cc Vo _ -~ 0, the AuC12 species should occur as the main reaction product. Therefore, the heterogeneous equilibrium determines the magnitude of the Au(1)/Au(III) concentration ratio in solution [2], and it also explains the well-known gold sludge formation at the anode.…”

Section: The Possible Mechanism Of Gold Elee Trodissolu Tionmentioning

confidence: 98%

See 3 more Smart Citations

The electrochemistry of gold in acid aqueous solutions containing chloride ions

Gallego

Castellano

Calandra

et al. 1975

Journal of Electroanalytical Chemistry and Interfacial Electroc

View full text Add to dashboard Cite

Results obtained with differently prepared gold electrodes in acid solutions containing chloride ion at temperatures ranging from 22 to 65°C are reported. Potentiostatie techniques and rotating disc electrodes were employed. The anodic dissolution, the onset of passivity and the cathodic deposition of the metal are investigated under different experimental conditions. The anodic dissolution of Au is discussed in terms of possible reaction mechanisms involving the participation of different adsorbed species. The onset of passivation is related to the depletion of chloride ion at the reaction interface. The experimental voltammograms can be reproduced by means of an equation which considers the diffusion of chloride ion, the activation polarization related to the dissolution of Au and the establishment of passivity.

show abstract

Section: Potentiodynamic Eli Curves Run With a Single Symmetric Triansupporting

confidence: 91%

Section: The Potential Region Of Gold Electrodissolution and Electrodmentioning

confidence: 55%

“…Data previously reported by other authors about Epass dependence on Ccn_ are also included in Fig. 20 [2].…”

Section: The Passivity Regionmentioning

confidence: 96%

Section: The Possible Mechanism Of Gold Elee Trodissolu Tionmentioning

confidence: 98%

See 2 more Smart Citations

The electrochemistry of gold in acid aqueous solutions containing chloride ions

Gallego

Castellano

Calandra

et al. 1975

Journal of Electroanalytical Chemistry and Interfacial Electroc

View full text Add to dashboard Cite

show abstract

“…In the solution with a chloride concentration of 10 -2 mol/litre, passivation is at somewhat higher potentials, re-activation occurs during the reverse sweep and there is no cathodic peak, indicating that no oxide is present. These experiments confirm the theory proposed by several authors (27,28,29,31) that the formation of an oxide film on gold results in passivation. It is also obvious that chemical dissolution of the oxide film is possible in chloride solutions.…”

Section: Passivation In Chloride Solutionssupporting

confidence: 91%