Electrochemical dissolution of gold in presence of chloride and bromide traces 
studied by on-line electrochemical inductively coupled plasma mass spectrometry

Kasian, Olga; Kulyk, Nadiia; Mingers, Andrea Maria; Zeradjanin, Aleksandar R.; Mayrhofer, Karl J. J.; Cherevko, Serhiy

doi:10.1016/j.electacta.2016.11.074

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Electrochemical dissolution of gold in presence of chloride and bromide traces studied by on-line electrochemical inductively coupled plasma mass spectrometry

MPG-Autoren

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Kasian, Olga
Electrocatalysis, Interface Chemistry and Surface Engineering, Max-Planck-Institut für Eisenforschung GmbH, Max Planck Society;

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Kulyk, Nadiia
Electrocatalysis, Interface Chemistry and Surface Engineering, Max-Planck-Institut für Eisenforschung GmbH, Max Planck Society;

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Mingers, Andrea Maria
Electrocatalysis, Interface Chemistry and Surface Engineering, Max-Planck-Institut für Eisenforschung GmbH, Max Planck Society;

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Zeradjanin, Aleksandar R.
Helmholtz-Institute Erlangen-Nuremberg for Renewable Energy (IEK-11), Forschungszentrum Jülich, Egerlandstrasse 3, 91058 Erlangen, Germany;
Electrocatalysis, Interface Chemistry and Surface Engineering, Max-Planck-Institut für Eisenforschung GmbH, Max Planck Society;

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Mayrhofer, Karl J. J.
Helmholtz-Institute Erlangen-Nuremberg for Renewable Energy (IEK-11), Forschungszentrum Jülich, Egerlandstrasse 3, 91058 Erlangen, Germany;
Electrocatalysis, Interface Chemistry and Surface Engineering, Max-Planck-Institut für Eisenforschung GmbH, Max Planck Society;

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Cherevko, Serhiy
Helmholtz-Institute Erlangen-Nuremberg for Renewable Energy (IEK-11), Forschungszentrum Jülich, Egerlandstrasse 3, 91058 Erlangen, Germany;
Electrocatalysis, Interface Chemistry and Surface Engineering, Max-Planck-Institut für Eisenforschung GmbH, Max Planck Society;

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Zitation

Kasian, O., Kulyk, N., Mingers, A. M., Zeradjanin, A. R., Mayrhofer, K. J. J., & Cherevko, S. (2016). Electrochemical dissolution of gold in presence of chloride and bromide traces studied by on-line electrochemical inductively coupled plasma mass spectrometry. Electrochimica Acta, 222, 1056-1063. doi:10.1016/j.electacta.2016.11.074.

Zitierlink: https://hdl.handle.net/11858/00-001M-0000-002D-3FCC-4

Zusammenfassung

Electrochemical dissolution of gold in the presence of halide ions is traditionally considered as a model case in metal corrosion and passivation studies. Due to a relatively low sensitivity of the conventional techniques, such studies were predominantly limited to electrolytes with high concentrations of halides. The current work employs a special electrochemical scanning flow cell with online inductively coupled plasma mass spectrometry (SFC-ICP-MS) that allows overcoming those limitations, enabling the quantification of gold dissolution in the presence of chloride and bromide traces (1 mu M <= [Cl- / Br-] <= 100 mu M). Moreover, time-and potential-resolved gold dissolution profiles under different potential programs are provided. Based on the experimental results, a tentative mechanism of gold dissolution based on the catalyzing role of hydroxyl and halide anions is discussed. (C) 2016 Elsevier Ltd. All rights reserved.