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  1. 1 Open Chemistry

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  1. 1 2007

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  1. 1 Lengyel B.

  2. 1 Mészáros G.

  3. 1 Szenes I.

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Sub-millivolt amplitude potential oscillations observed in the noise of hydrogen evolution on Ag and Cu microelectrodes

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Szenes I., Mészáros G., Lengyel B.
Open Chemistry
|
2007
|
vol. 5
|
issue 2
466-478
EN
A strange effect was observed while using the method of quasi-simultaneous determination of electrochemical voltage noise and impedance to obtain information on the kinetics of the hydrogen evolution reaction on Ag and Cu microelectrodes. Beyond a certain polarizing current density we found microvolt-amplitude potential oscillations on both electrodes with a frequency in the 5 Hz–5 kHz range. The oscillations were observed in every single experiment with Ag and Cu, while no oscillatory behavior was observed during the control experiments with the Pt microelectrode. The presence of the oscillations indicates that the mechanism of hydrogen evolution is more complex compared to the original assumption. [...]
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