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

• Authors: Ildikó Szenes , Gábor Mészáros , Béla Lengyel
• Languages of publication: EN

Abstracts

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. [...]

Keywords

EN

Hydrogen reduction; electrochemical noise; electrochemical impedance; relative power spectral density; sub-millivolt electrochemical oscillation

• Publisher: De Gruyter Open
• Journal: Open Chemistry
• Year: 2007
• Volume: 5
• Issue: 2
• Pages: 466-478

Dates

published

1 - 6 - 2007

online

23 - 1 - 2007

Contributors

author

Ildikó Szenes

• Institute of Materials and Environmental Chemistry, Chemical Research Center, Hungarian Academy of Science, H-1025, Budapest, Pusztaszeri út 59-67, Hungary

author

Gábor Mészáros

• Institute of Materials and Environmental Chemistry, Chemical Research Center, Hungarian Academy of Science, H-1025, Budapest, Pusztaszeri út 59-67, Hungary

author

Béla Lengyel

• Institute of Materials and Environmental Chemistry, Chemical Research Center, Hungarian Academy of Science, H-1025, Budapest, Pusztaszeri út 59-67, Hungary

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Identifiers

DOI

10.2478/s11532-007-0004-1