> Details

Jenewein, Ken J. [Author]; Knöppel, Julius [Author]; Hofer, André [Author]; Kormányos, Attila [Author]; Mayerhöfer, Britta [Author]; Speck, Florian D. [Author]; Bierling, Markus [Author]; Thiele, Simon [Author]; Bachmann, Julien [Author]; Cherevko, Serhiy [Author]

Dissolution of WO 3 modified with IrO x overlayers during photoelectrochemical water splitting

Reference
management

Bookmarks

Remove from
bookmarks

Share this on Whatsapp

Close

Bookmarks



You can manage bookmarks using lists, please log in to your user account for this.
  • Media type: E-Article
  • Title: Dissolution of WO 3 modified with IrO x overlayers during photoelectrochemical water splitting
  • Contributor: Jenewein, Ken J. [Author]; Knöppel, Julius [Author]; Hofer, André [Author]; Kormányos, Attila [Author]; Mayerhöfer, Britta [Author]; Speck, Florian D. [Author]; Bierling, Markus [Author]; Thiele, Simon [Author]; Bachmann, Julien [Author]; Cherevko, Serhiy [Author]
  • imprint: Wiley, 2023
  • Published in: SusMat 3(1), 128-136 (2023). doi:10.1002/sus2.107
  • Language: English
  • DOI: https://doi.org/10.1002/sus2.107
  • ISSN: 2692-4552; 2766-8479
  • Origination:
  • Footnote: Diese Datenquelle enthält auch Bestandsnachweise, die nicht zu einem Volltext führen.
  • Description: WO3, an abundant transition metal semiconductor, is one of the most discussedmaterials to be used as a photoanode in photoelectrochemical water-splittingdevices. The photoelectrochemical properties, such as photoactivity and selectivityofWO3 in different electrolytes, are already well understood. However, theunderstanding of stability, one of the most important properties for utilizationin a commercial device, is still in the early stages. In this work, a photoelectrochemicalscanning flow cell coupled to an inductively coupled plasma massspectrometer is applied to determine the influence of co-catalyst overlayers onphotoanode stability. Spray-coatedWO3 photoanodes are used as a model system.Iridium is applied to the electrodes by atomic layer deposition in controlled layerthickness, as determined by ellipsometry and x-ray photoelectron spectroscopy.Photoactivity of the iridium-modifiedWO3 photoanodes decreases with increasingiridium layer thickness. Partial blocking of the WO3 surface by iridium isproposed as the main cause of the decreased photoelectrochemical performance.On the other hand, the stability ofWO3 is notably increased even in the presenceof the thinnest investigated iridium overlayer. Based on our findings, we providea set of strategies to synthesize nanocomposite photoelectrodes simultaneouslypossessing high photoelectrochemical activity and photostability.
  • Access State: Open Access