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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{
  "@context": "https://schema.org/", 
  "identifier": "https://doi.org/10.14278/rodare.3330", 
  "@id": "https://doi.org/10.14278/rodare.3330", 
  "name": "Data publication: Dual wetting electrode surfaces for alkaline water electrolysis", 
  "datePublished": "2025-01-28", 
  "url": "https://rodare.hzdr.de/record/3330", 
  "distribution": [
    {
      "fileFormat": "zip", 
      "@type": "DataDownload", 
      "contentUrl": "https://rodare.hzdr.de/api/files/7cd975f7-77f9-46f6-ba45-ae8c60f6baaf/Data.zip"
    }
  ], 
  "@type": "Dataset", 
  "sameAs": [
    "https://www.hzdr.de/publications/Publ-40874"
  ], 
  "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>\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>", 
  "license": "https://creativecommons.org/licenses/by/4.0/legalcode", 
  "keywords": [
    "Alkaline water electrolysis", 
    "Hydrogen evolution reaction", 
    "Bubble dynamics", 
    "Dual wetting", 
    "Direct laser writing"
  ], 
  "inLanguage": {
    "alternateName": "eng", 
    "name": "English", 
    "@type": "Language"
  }, 
  "version": "1", 
  "creator": [
    {
      "affiliation": "nstitute of Fluid Dynamics, Helmholtz-Zentrum Dresden-Rossendorf, Bautzner Landstrasse 400, Dresden, 01328 Germany", 
      "name": "Rox, Hannes", 
      "@type": "Person", 
      "@id": "https://orcid.org/0000-0003-2826-6903"
    }, 
    {
      "affiliation": "Institute of Manufacturing, Technische Universit\u00e4t Dresden, 01062 Dresden, Germany", 
      "name": "R\u00e4nke, Fabian", 
      "@type": "Person", 
      "@id": "https://orcid.org/0009-0001-4313-9753"
    }, 
    {
      "affiliation": "Institute of Manufacturing, Technische Universit\u00e4t Dresden, 01062 Dresden, Germany", 
      "name": "Zschach, Lis Geraldine", 
      "@type": "Person", 
      "@id": "https://orcid.org/0000-0002-9509-7487"
    }, 
    {
      "affiliation": "nstitute of Fluid Dynamics, Helmholtz-Zentrum Dresden-Rossendorf, Bautzner Landstrasse 400, Dresden, 01328 Germany", 
      "name": "Yang, Xuegeng", 
      "@type": "Person", 
      "@id": "https://orcid.org/0000-0002-4617-0713"
    }, 
    {
      "affiliation": "nstitute of Fluid Dynamics, Helmholtz-Zentrum Dresden-Rossendorf, Bautzner Landstrasse 400, Dresden, 01328 Germany", 
      "name": "Mutschke, Gerd", 
      "@type": "Person", 
      "@id": "https://orcid.org/0000-0002-7918-7474"
    }, 
    {
      "affiliation": "nstitute of Fluid Dynamics, Helmholtz-Zentrum Dresden-Rossendorf, Bautzner Landstrasse 400, Dresden, 01328 Germany", 
      "name": "Eckert, Kerstin", 
      "@type": "Person", 
      "@id": "https://orcid.org/0000-0002-9671-8628"
    }, 
    {
      "affiliation": "Institute of Manufacturing, Technische Universit\u00e4t Dresden, 01062 Dresden, Germany", 
      "name": "Lasagni, Andr\u00e9s Fabi\u00e1n", 
      "@type": "Person", 
      "@id": "https://orcid.org/0000-0003-4333-4636"
    }, 
    {
      "affiliation": "Institute of Manufacturing, Technische Universit\u00e4t Dresden, 01062 Dresden, Germany", 
      "name": "Baumann, Robert", 
      "@type": "Person", 
      "@id": "https://orcid.org/0000-0002-8589-4685"
    }
  ]
}