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Balancing activity, stability and conductivity of nanoporous core-shell iridium/iridium oxide oxygen evolution catalysts

Author

Listed:
  • Yong-Tae Kim

    (Pusan National University)

  • Pietro Papa Lopes

    (Argonne National Laboratory)

  • Shin-Ae Park

    (Pusan National University)

  • A-Yeong Lee

    (Pusan National University)

  • Jinkyu Lim

    (Korea Advanced Institute of Science and Technology)

  • Hyunjoo Lee

    (Korea Advanced Institute of Science and Technology)

  • Seoin Back

    (Korea Advanced Institute of Science and Technology)

  • Yousung Jung

    (Korea Advanced Institute of Science and Technology)

  • Nemanja Danilovic

    (Argonne National Laboratory)

  • Vojislav Stamenkovic

    (Argonne National Laboratory)

  • Jonah Erlebacher

    (Johns Hopkins University)

  • Joshua Snyder

    (Drexel University)

  • Nenad M. Markovic

    (Argonne National Laboratory)

Abstract

The selection of oxide materials for catalyzing the oxygen evolution reaction in acid-based electrolyzers must be guided by the proper balance between activity, stability and conductivity—a challenging mission of great importance for delivering affordable and environmentally friendly hydrogen. Here we report that the highly conductive nanoporous architecture of an iridium oxide shell on a metallic iridium core, formed through the fast dealloying of osmium from an Ir25Os75 alloy, exhibits an exceptional balance between oxygen evolution activity and stability as quantified by the activity-stability factor. On the basis of this metric, the nanoporous Ir/IrO2 morphology of dealloyed Ir25Os75 shows a factor of ~30 improvement in activity-stability factor relative to conventional iridium-based oxide materials, and an ~8 times improvement over dealloyed Ir25Os75 nanoparticles due to optimized stability and conductivity, respectively. We propose that the activity-stability factor is a key “metric” for determining the technological relevance of oxide-based anodic water electrolyzer catalysts.

Suggested Citation

  • Yong-Tae Kim & Pietro Papa Lopes & Shin-Ae Park & A-Yeong Lee & Jinkyu Lim & Hyunjoo Lee & Seoin Back & Yousung Jung & Nemanja Danilovic & Vojislav Stamenkovic & Jonah Erlebacher & Joshua Snyder & Nen, 2017. "Balancing activity, stability and conductivity of nanoporous core-shell iridium/iridium oxide oxygen evolution catalysts," Nature Communications, Nature, vol. 8(1), pages 1-8, December.
    • Handle: RePEc:nat:natcom:v:8:y:2017:i:1:d:10.1038_s41467-017-01734-7
    DOI: 10.1038/s41467-017-01734-7
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    Cited by:

    1. Gyu Rac Lee & Jun Kim & Doosun Hong & Ye Ji Kim & Hanhwi Jang & Hyeuk Jin Han & Chang-Kyu Hwang & Donghun Kim & Jin Young Kim & Yeon Sik Jung, 2023. "Efficient and sustainable water electrolysis achieved by excess electron reservoir enabling charge replenishment to catalysts," Nature Communications, Nature, vol. 14(1), pages 1-12, December.
    2. Fan Liao & Kui Yin & Yujin Ji & Wenxiang Zhu & Zhenglong Fan & Youyong Li & Jun Zhong & Mingwang Shao & Zhenhui Kang & Qi Shao, 2023. "Iridium oxide nanoribbons with metastable monoclinic phase for highly efficient electrocatalytic oxygen evolution," Nature Communications, Nature, vol. 14(1), pages 1-11, December.
    3. Jiahao Yu & Felipe A. Garcés-Pineda & Jesús González-Cobos & Marina Peña-Díaz & Celia Rogero & Sixto Giménez & Maria Chiara Spadaro & Jordi Arbiol & Sara Barja & José Ramón Galán-Mascarós, 2022. "Sustainable oxygen evolution electrocatalysis in aqueous 1 M H2SO4 with earth abundant nanostructured Co3O4," Nature Communications, Nature, vol. 13(1), pages 1-10, December.
    4. Xinxuan Duan & Qihao Sha & Pengsong Li & Tianshui Li & Guotao Yang & Wei Liu & Ende Yu & Daojin Zhou & Jinjie Fang & Wenxing Chen & Yizhen Chen & Lirong Zheng & Jiangwen Liao & Zeyu Wang & Yaping Li &, 2024. "Dynamic chloride ion adsorption on single iridium atom boosts seawater oxidation catalysis," Nature Communications, Nature, vol. 15(1), pages 1-11, December.
    5. Yizhen Lu & Bixuan Li & Na Xu & Zhihua Zhou & Yu Xiao & Yu Jiang & Teng Li & Sheng Hu & Yongji Gong & Yang Cao, 2023. "One-atom-thick hexagonal boron nitride co-catalyst for enhanced oxygen evolution reactions," Nature Communications, Nature, vol. 14(1), pages 1-8, December.

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