Publications Repository - Helmholtz-Zentrum Dresden-Rossendorf
1 PublicationOscillating hydrogen bubbles at Pt microelectrodes
Bashkatov, A.; Hossain, S. S.; Yang, X.; Mutschke, G.; Eckert, K.
Abstract
The dynamics of hydrogen bubbles produced via electrolysis in acidic electrolytes is studied in a combination of experiments and numerical simulations.
A transition from monotonous to oscillatory bubble growth is observed after 2/3 of the bubble lifetime, if the electric potential exceeds -3V. This work analyzes characteristic features of the oscillations in terms of bubble geometry, the thickness of the microbubble carpet and the oscillation frequency. An explanation of the oscillation mechanisms is provided by the competition between buoyancy and electric force, the magnitude of which depends on the carpet thickness. Both the critical carpet thickness at detachment and the oscillation frequencies of the bubble as predicted by the model agree well with the experiment.
Keywords: electrolysis; hydrogen bubble; oscillations; charged bubble; electric force
-
Physical Review Letters 123(2019)21, 214503-1-214503-6
DOI: 10.1103/PhysRevLett.123.214503
Cited 51 times in Scopus
Permalink: https://www.hzdr.de/publications/Publ-29132
Years: 2023 2022 2021 2020 2019 2018 2017 2016 2015