January 28, 2025 Dataset Open Access

Rox, Hannes; Ränke, Fabian; Zschach, Lis Geraldine; Yang, Xuegeng; Mutschke, Gerd; Eckert, Kerstin; Lasagni, Andrés Fabián; Baumann, Robert

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{
  "publisher": "Rodare", 
  "issued": {
    "date-parts": [
      [
        2025, 
        1, 
        28
      ]
    ]
  }, 
  "language": "eng", 
  "DOI": "10.14278/rodare.3330", 
  "note": "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).", 
  "type": "dataset", 
  "abstract": "<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>\n\n<p><strong>Description of <em>Data.zip</em>:</strong></p>\n\n<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>\n\n<ul>\n\t<li>Electrochemical Measurement Data\n\t<ul>\n\t\t<li>Galvanostatic Measurement Data</li>\n\t\t<li>CV double-layer capacitance</li>\n\t\t<li>LSV onset potential</li>\n\t</ul>\n\t</li>\n\t<li>Results\n\t<ul>\n\t\t<li>Detected Bubbles Sideview</li>\n\t</ul>\n\t</li>\n\t<li><em>Sideview Raw Images (only for <strong>SH2_LS_Pil_01.hdf5</strong>)</em></li>\n</ul>\n\n<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>", 
  "title": "Data publication: Dual wetting electrode surfaces for alkaline water electrolysis", 
  "id": "3330", 
  "author": [
    {
      "family": "Rox, Hannes"
    }, 
    {
      "family": "R\u00e4nke, Fabian"
    }, 
    {
      "family": "Zschach, Lis Geraldine"
    }, 
    {
      "family": "Yang, Xuegeng"
    }, 
    {
      "family": "Mutschke, Gerd"
    }, 
    {
      "family": "Eckert, Kerstin"
    }, 
    {
      "family": "Lasagni, Andr\u00e9s Fabi\u00e1n"
    }, 
    {
      "family": "Baumann, Robert"
    }
  ], 
  "version": "1"
}