IDEAS home Printed from https://ideas.repec.org/a/nat/natcom/v12y2021i1d10.1038_s41467-021-24181-x.html
   My bibliography  Save this article

The origin of the high electrochemical activity of pseudo-amorphous iridium oxides

Author

Listed:
  • Marine Elmaalouf

    (ITODYS, CNRS, UMR 7086, Université de Paris)

  • Mateusz Odziomek

    (Sorbonne Université, CNRS, Collège de France, Laboratoire Chimie de la Matière Condensée de Paris, LCMCP, UMR 7574)

  • Silvia Duran

    (Laboratoire de Chimie Moléculaire (LCM), CNRS, Ecole Polytechnique, Institut Polytechnique de Paris)

  • Maxime Gayrard

    (Sorbonne Université, CNRS, Collège de France, Laboratoire Chimie de la Matière Condensée de Paris, LCMCP, UMR 7574)

  • Mounib Bahri

    (IPCMS, CNRS, Université de Strasbourg)

  • Cédric Tard

    (Laboratoire de Chimie Moléculaire (LCM), CNRS, Ecole Polytechnique, Institut Polytechnique de Paris)

  • Andrea Zitolo

    (Synchrotron SOLEIL, L’Orme des Merisiers, Saint-Aubin)

  • Benedikt Lassalle-Kaiser

    (Synchrotron SOLEIL, L’Orme des Merisiers, Saint-Aubin)

  • Jean-Yves Piquemal

    (ITODYS, CNRS, UMR 7086, Université de Paris)

  • Ovidiu Ersen

    (IPCMS, CNRS, Université de Strasbourg)

  • Cédric Boissière

    (Sorbonne Université, CNRS, Collège de France, Laboratoire Chimie de la Matière Condensée de Paris, LCMCP, UMR 7574)

  • Clément Sanchez

    (Sorbonne Université, CNRS, Collège de France, Laboratoire Chimie de la Matière Condensée de Paris, LCMCP, UMR 7574)

  • Marion Giraud

    (ITODYS, CNRS, UMR 7086, Université de Paris)

  • Marco Faustini

    (Sorbonne Université, CNRS, Collège de France, Laboratoire Chimie de la Matière Condensée de Paris, LCMCP, UMR 7574)

  • Jennifer Peron

    (ITODYS, CNRS, UMR 7086, Université de Paris)

Abstract

Combining high activity and stability, iridium oxide remains the gold standard material for the oxygen evolution reaction in acidic medium for green hydrogen production. The reasons for the higher electroactivity of amorphous iridium oxides compared to their crystalline counterpart is still the matter of an intense debate in the literature and, a comprehensive understanding is needed to optimize its use and allow for the development of water electrolysis. By producing iridium-based mixed oxides using aerosol, we are able to decouple the electronic processes from the structural transformation, i.e. Ir oxidation from IrO2 crystallization, occurring upon calcination. Full characterization using in situ and ex situ X-ray absorption spectroscopy, X-ray photoelectron spectroscopy, X-ray diffraction and transmission electron microscopy allows to unambiguously attribute their high electrochemical activity to structural features and rules out the iridium oxidation state as a critical parameter. This study indicates that short-range ordering, corresponding to sub-2nm crystal size for our samples, drives the activity independently of the initial oxidation state and composition of the calcined iridium oxides.

Suggested Citation

  • Marine Elmaalouf & Mateusz Odziomek & Silvia Duran & Maxime Gayrard & Mounib Bahri & Cédric Tard & Andrea Zitolo & Benedikt Lassalle-Kaiser & Jean-Yves Piquemal & Ovidiu Ersen & Cédric Boissière & Clé, 2021. "The origin of the high electrochemical activity of pseudo-amorphous iridium oxides," Nature Communications, Nature, vol. 12(1), pages 1-10, December.
    • Handle: RePEc:nat:natcom:v:12:y:2021:i:1:d:10.1038_s41467-021-24181-x
    DOI: 10.1038/s41467-021-24181-x
    as

    Download full text from publisher

    File URL: https://www.nature.com/articles/s41467-021-24181-x
    File Function: Abstract
    Download Restriction: no
    File URL: https://libkey.io/10.1038/s41467-021-24181-x?utm_source=ideas
    LibKey link: if access is restricted and if your library uses this service, LibKey will redirect you to where you can use your library subscription to access this item
    ---><---

    Citations

    Citations are extracted by the CitEc Project, subscribe to its RSS feed for this item.
    as


    Cited by:

    1. María Retuerto & Laura Pascual & Jorge Torrero & Mohamed Abdel Salam & Álvaro Tolosana-Moranchel & Diego Gianolio & Pilar Ferrer & Paula Kayser & Vincent Wilke & Svenja Stiber & Verónica Celorrio & Mo, 2022. "Highly active and stable OER electrocatalysts derived from Sr2MIrO6 for proton exchange membrane water electrolyzers," Nature Communications, Nature, vol. 13(1), pages 1-10, December.

    More about this item

    Statistics

    Access and download statistics

    Corrections

    All material on this site has been provided by the respective publishers and authors. You can help correct errors and omissions. When requesting a correction, please mention this item's handle: RePEc:nat:natcom:v:12:y:2021:i:1:d:10.1038_s41467-021-24181-x. See general information about how to correct material in RePEc.

    If you have authored this item and are not yet registered with RePEc, we encourage you to do it here. This allows to link your profile to this item. It also allows you to accept potential citations to this item that we are uncertain about.

    We have no bibliographic references for this item. You can help adding them by using this form .

    If you know of missing items citing this one, you can help us creating those links by adding the relevant references in the same way as above, for each refering item. If you are a registered author of this item, you may also want to check the "citations" tab in your RePEc Author Service profile, as there may be some citations waiting for confirmation.

    For technical questions regarding this item, or to correct its authors, title, abstract, bibliographic or download information, contact: Sonal Shukla or Springer Nature Abstracting and Indexing (email available below). General contact details of provider: http://www.nature.com .

    Please note that corrections may take a couple of weeks to filter through the various RePEc services.

    IDEAS is a RePEc service. RePEc uses bibliographic data supplied by the respective publishers.