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Erhöhte Leistungsfähigkeit mikrobieller Elektrolysezellen durch Einsatz mikrostrukturierter Elektroden
Author(s) -
Keil T.M.,
Windisch D.,
Joukov V.,
Niedermeier J.,
Schulz W.,
Albrecht J.
Publication year - 2021
Publication title -
materialwissenschaft und werkstofftechnik
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.285
H-Index - 38
eISSN - 1521-4052
pISSN - 0933-5137
DOI - 10.1002/mawe.202000198
Subject(s) - electrolysis , hydrogen , electrode , passivation , hydrogen production , materials science , methane , chemical engineering , electrolysis of water , bubble , nanotechnology , chemistry , layer (electronics) , computer science , engineering , electrolyte , organic chemistry , parallel computing
A microbial electrolysis cell is set up with the purpose to realize an efficient power‐to‐gas process. Both hydrogen production by electrolysis and biomethanization proceed in the same reactor cell. In particular, the formation of hydrogen bubbles is strongly governed by the surface properties of the used stainless steel electrodes. Here, we introduce surface topography modifications on the micron‐scale to enhance the electrical transport in the cell and support charge conversion into hydrogen. Furthermore, it is analyzed if hydrogen bubble detachment can be supported to form smaller bubbles that can be efficiently converted into methane. A positive influence on the electrical transport is found and explained by a surface‐controlled suppression of bio‐film passivation.