Electrochemical processes
Gas-evolving electrodes are a central element in technologically important processes such as chlor-alkali or alkaline water electrolysis. However, an in-depth understanding of bubble nucleation, growth, coalescence and bubble detachment is not yet achieved. The studies aim on fundamental understanding of bubble dynamics, especially single hydrogen bubble generated by water electrolysis at micro-electrode. Electrochemical investigations are supported by high speed optical imaging, velocity and temperature measurements and numerical simulation in cooperation.
Cooperations
- IFW Dresden
- TU Ilmenau
- Bundeswehruniversität München
Publications
Xuegeng Yang, Franziska Karnbach, Margitta Uhlemann, Stefan Odenbach, Kerstin Eckert, Dynamics of single hydrogen bubbles at a platinum microelectrode, Langmuir, 31, 8184-8193 (2015).
Franziska Karnbach, Xuegeng Yang, Gerd Mutschke, Jochen Fröhlich, Jürgen Eckert, Annett Gebert, Kristina Tschulik, Kerstin Eckert, Margitta Uhlemann, Interplay of the Open Circuit Potential-Relaxation and the Dissolution Behavior of a Single H2 Bubble Generated at a Pt Microelectrode, The Journal of Physical Chemistry C, 120, 15137-15146 (2016).
Dominik Baczyzmalski, Franziska Karnbach, Xuegeng Yang, Gerd Mutschke, Margitta Uhlemann, Kerstin Eckert, Christian Cierpka, On the Electrolyte Convection around a Hydrogen Bubble Evolving at a Microelectrode under the Influence of a Magnetic Field, Journal of The Electrochemical Society, 163, E248-E257 (2016).
Dominik Baczyzmalski, Franziska Karnbach, Gerd Mutschke, Xuegeng Yang, Kerstin Eckert, Margitta Uhlemann, Christian Cierpka, Growth and detachment of single hydrogen bubbles in a magnetohydrodynamic shear flow, Physical Review Fluids, 2, 093701 (2017).
Gerd Mutschke, Dominik Baczyzmalski, Christian Cierpka, Franziska Karnbach, Margitta Uhlemann, Xuegeng Yang, Kerstin Eckert, Jochen Fröhlich, Numerical simulation of mass transfer and convection near a hydrogen bubble during water electrolysis in a magnetic field, Magnetohydrodynamics, 53, 193-200 (2017).