Data publication: Dual wetting electrode surfaces for alkaline water electrolysis

2026-04-21T00:35:34Z https://rodare.hzdr.de/oai2d

oai:rodare.hzdr.de:3330 2025-05-06T09:06:49Z openaire_data user-rodare user-energy user-fwd user-hzdr

true 3.1 HZDR.RODARE 10.14278/rodare.3330 Rox, Hannes 0000-0003-2826-6903 nstitute of Fluid Dynamics, Helmholtz-Zentrum Dresden-Rossendorf, Bautzner Landstrasse 400, Dresden, 01328 Germany Ränke, Fabian 0009-0001-4313-9753 Institute of Manufacturing, Technische Universität Dresden, 01062 Dresden, Germany Zschach, Lis Geraldine 0000-0002-9509-7487 Institute of Manufacturing, Technische Universität Dresden, 01062 Dresden, Germany Yang, Xuegeng 0000-0002-4617-0713 nstitute of Fluid Dynamics, Helmholtz-Zentrum Dresden-Rossendorf, Bautzner Landstrasse 400, Dresden, 01328 Germany Mutschke, Gerd 0000-0002-7918-7474 nstitute of Fluid Dynamics, Helmholtz-Zentrum Dresden-Rossendorf, Bautzner Landstrasse 400, Dresden, 01328 Germany Eckert, Kerstin 0000-0002-9671-8628 nstitute of Fluid Dynamics, Helmholtz-Zentrum Dresden-Rossendorf, Bautzner Landstrasse 400, Dresden, 01328 Germany Lasagni, Andrés Fabián 0000-0003-4333-4636 Institute of Manufacturing, Technische Universität Dresden, 01062 Dresden, Germany Baumann, Robert 0000-0002-8589-4685 Institute of Manufacturing, Technische Universität Dresden, 01062 Dresden, Germany Data publication: Dual wetting electrode surfaces for alkaline water electrolysis Rodare 2025 Alkaline water electrolysis Hydrogen evolution reaction Bubble dynamics Dual wetting Direct laser writing 2025-01-28 en https://rodare.hzdr.de/record/3330 https://www.hzdr.de/publications/Publ-40874 https://www.hzdr.de/publications/Publ-41120 10.14278/rodare.3329 https://rodare.hzdr.de/communities/energy https://rodare.hzdr.de/communities/fwd https://rodare.hzdr.de/communities/hzdr https://rodare.hzdr.de/communities/rodare 1 Creative Commons Attribution 4.0 International Open Access Tuning the electrode surfaces for better bubble management is a promising approach to increase the efficiency of alkaline water electrolysis. Therefore, Direct Laser Writing was used to structure Nickel electrodes with a dual wetting surface. The applied pillar-like structure combines superhydrophilic behavior and strong spreading of the liquid across the electrode with hydrophobic bubble nucleation sites. In addition, the electrochemically active surface area is increased by a factor of 9. As a result, the overpotential has been significantly reduced, while the size of the detached bubble has increased. The present data set compares three different electrodes, a non-structured reference electrode and two laser structured electrodes with different depths of the structure, at applied current densities of j = -20, -50 and -100 mA/cm² in terms of electrode potential, detached bubble size and number of nucleation sites. As electrolyte 1 M KOH was used. All experiments were carried out under ambient conditions (T = 293 K,p = 1 bar). Description of Data.zip: An overview of all performed experiments is given in the file Summary.csv. The data is analyzed as described in the corresponding journal publication Dual wetting electrode surfaces for alkaline water electrolysis. Each data set is stored in a .hdf5-file, with the relevant metadata incorporated into the attributes assigned to the groups/datasets within the .hdf5-file. The data files are structured in groups as follows: <ul> <li>Electrochemical Measurement Data <ul> <li>Galvanostatic Measurement Data</li> <li>CV double-layer capacitance</li> <li>LSV onset potential</li> </ul> </li> <li>Results <ul> <li>Detected Bubbles Sideview</li> </ul> </li> <li>Sideview Raw Images (only for SH2_LS_Pil_01.hdf5)</li> </ul> With the exception of a single comprehensive data set comprising unprocessed images (SH2_LS_Pil_01.hdf5), the remaining raw images from all performed measurements can be made available upon request. This project is supported by the Federal State of Saxony in terms of the "European Regional Development Fund" (H2-EPF-HZDR), the Helmholtz Association Innovation pool project "Solar Hydrogen", the Hydrogen Lab of the School of Engineering of TU Dresden, and BMBF (project ALKALIMIT, grant no. 03SF0731A).