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Towards maximized utilization of iridium for the acidic oxygen evolution reaction

  • Marc LedendeckerEmail author
  • Simon Geiger
  • Katharina Hengge
  • Joohyun Lim
  • Serhiy Cherevko
  • Andrea M. Mingers
  • Daniel Göhl
  • Guilherme V. Fortunato
  • Daniel Jalalpoor
  • Ferdi Schüth
  • Christina Scheu
  • Karl J. J. MayrhoferEmail author
Open Access
Research Article
  • 204 Downloads

Abstract

The reduction in noble metal content for efficient oxygen evolution catalysis is a crucial aspect towards the large scale commercialisation of polymer electrolyte membrane electrolyzers. Since catalytic stability and activity are inversely related, long service lifetime still demands large amounts of low-abundant and expensive iridium. In this manuscript we elaborate on the concept of maximizing the utilisation of iridium for the oxygen evolution reaction. By combining different tin oxide based support materials with liquid atomic layer deposition of iridium oxide, new possibilities are opened up to grow thin layers of iridium oxide with tuneable noble metal amounts. In-situ, time- and potential-resolved dissolution experiments reveal how the stability of the substrate and the catalyst layer thickness directly affect the activity and stability of deposited iridium oxide. Based on our results, we elaborate on strategies how to obtain stable and active catalysts with maximized iridium utilisation for the oxygen evolution reaction and demonstrate how the activity and durability can be tailored correspondingly. Our results highlight the potential of utilizing thin noble metal films with earth abundant support materials for future catalytic applications in the energy sector.

Keywords

oxygen evolution reaction liquid atomic layer deposition catalysis iridium core-shell nanoparticles 

Notes

Acknowledgements

This research has been funded by the Federal Ministry for Economic Affairs and Energy (BMWi) of Germany in the framework of PtTM@HGS (No. 03ET6080A). G. V. F. thanks CAPES for the PDSE fellowship (No. 88881.131904/2016-01).

Supplementary material

12274_2019_2383_MOESM1_ESM.pdf (3.7 mb)
Supplementary material, approximately 228 KB.

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Authors and Affiliations

  • Marc Ledendecker
    • 1
    Email author
  • Simon Geiger
    • 1
  • Katharina Hengge
    • 1
  • Joohyun Lim
    • 1
  • Serhiy Cherevko
    • 3
  • Andrea M. Mingers
    • 1
  • Daniel Göhl
    • 1
  • Guilherme V. Fortunato
    • 1
    • 5
  • Daniel Jalalpoor
    • 2
  • Ferdi Schüth
    • 2
  • Christina Scheu
    • 1
  • Karl J. J. Mayrhofer
    • 1
    • 3
    • 4
    Email author
  1. 1.Department of Interface Chemistry and Surface EngineeringNanoanalytics and Interfaces Max-Planck-Institut für Eisenforschung GmbHDüsseldorfGermany
  2. 2.Department of Heterogeneous CatalysisMax-Planck-Institut für KohlenforschungMülheim an der RuhrGermany
  3. 3.Helmholtz-Institute Erlangen-Nürnberg for Renewable Energy (IEK-11)Forschungszentrum JülichErlangenGermany
  4. 4.Department of Chemical and Biological EngineeringFriedrich-Alexander-Universität Erlangen-NürnbergErlangenGermany
  5. 5.Institute of ChemistryUniversidade Federal de Mato Grosso do SulCampo Grande, MSBrazil

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