Dataset Open Access
Data publication: Dual wetting electrode surfaces for alkaline water electrolysis
Rox, Hannes;
Ränke, Fabian;
Zschach, Lis Geraldine;
Yang, Xuegeng;
Mutschke, Gerd;
Eckert, Kerstin;
Lasagni, Andrés Fabián;
Baumann, Robert
DCAT Export
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<dct:title>Data publication: Dual wetting electrode surfaces for alkaline water electrolysis</dct:title>
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<dcat:keyword>Alkaline water electrolysis</dcat:keyword>
<dcat:keyword>Hydrogen evolution reaction</dcat:keyword>
<dcat:keyword>Bubble dynamics</dcat:keyword>
<dcat:keyword>Dual wetting</dcat:keyword>
<dcat:keyword>Direct laser writing</dcat:keyword>
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<dct:description><p>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<strong> <em>j</em> = -20, -50 and -100 mA/cm&sup2;</strong> in terms of electrode potential, detached bubble size and number of nucleation sites. As electrolyte <strong>1 M KOH</strong> was used. All experiments were carried out under ambient conditions (<strong><em>T</em> = 293 K,<em>p</em> = 1 bar</strong>).</p> <p><strong>Description of <em>Data.zip</em>:</strong></p> <p>An overview of all performed experiments is given in the file <strong><em>Summary.csv</em></strong>. The data is analyzed as described in the corresponding journal publication <strong><em>Dual wetting electrode surfaces for alkaline water electrolysis</em></strong>. 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:</p> <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><em>Sideview Raw Images (only for <strong>SH2_LS_Pil_01.hdf5</strong>)</em></li> </ul> <p>With the exception of a single comprehensive data set comprising unprocessed images (<strong>SH2_LS_Pil_01.hdf5</strong>), the remaining raw images from all performed measurements can be made available upon request.</p></dct:description>
<dct:description xml:lang="">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).</dct:description>
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| Data volume | 750.3 GB | 750.3 GB |
| Unique views | 524 | 524 |
| Unique downloads | 21 | 21 |
- Publication date:
- January 28, 2025
- DOI:
-
- Keyword(s):
- Alkaline water electrolysis Hydrogen evolution reaction Bubble dynamics Dual wetting Direct laser writing
- Related identifiers:
- Identical to:
https://www.hzdr.de/publications/Publ-40874 - Referenced by:
https://www.hzdr.de/publications/Publ-41120 - Communities:
- License (for files):
- Creative Commons Attribution 4.0 International