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Atomically dispersed hybrid nickel-iridium sites for photoelectrocatalysis

Author

Listed:
  • Chunhua Cui

    (University of Zürich
    University of Electronic Science and Technology of China)

  • Marc Heggen

    (Ernst Ruska-Centre for Microscopy and Spectroscopy with Electrons, Forschungszentrum Juelich GmbH)

  • Wolf-Dietrich Zabka

    (University of Zürich)

  • Wei Cui

    (University of Zürich)

  • Jürg Osterwalder

    (University of Zürich)

  • Benjamin Probst

    (University of Zürich)

  • Roger Alberto

    (University of Zürich)

Abstract

Atomically dispersed supported catalysts can maximize atom efficiency and minimize cost. In spite of much progress in gas-phase catalysis, applying such catalysts in the field of renewable energy coupled with electrochemistry remains a challenge due to their limited durability in electrolyte. Here, we report a robust and atomically dispersed hybrid catalyst formed in situ on a hematite semiconductor support during photoelectrochemical oxygen evolution by electrostatic adsorption of soluble monomeric [Ir(OH)6]2− coupled to positively charged NiOx sites. The alkali-stable [Ir(OH)6]2− features synergistically enhanced activity toward water oxidation through NiOx that acts as a “movable bridge” of charge transfer from the hematite surface to the single iridium center. This hybrid catalyst sustains high performance and stability in alkaline electrolyte for >80 h of operation. Our findings provide a promising path for soluble catalysts that are weakly and reversibly bound to semiconductor-supported hole-accumulation inorganic materials under catalytic reaction conditions as hybrid active sites for photoelectrocatalysis.

Suggested Citation

  • Chunhua Cui & Marc Heggen & Wolf-Dietrich Zabka & Wei Cui & Jürg Osterwalder & Benjamin Probst & Roger Alberto, 2017. "Atomically dispersed hybrid nickel-iridium sites for photoelectrocatalysis," Nature Communications, Nature, vol. 8(1), pages 1-7, December.
    • Handle: RePEc:nat:natcom:v:8:y:2017:i:1:d:10.1038_s41467-017-01545-w
    DOI: 10.1038/s41467-017-01545-w
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    Cited by:

    1. Zhirong Zhang & Chen Feng & Dongdi Wang & Shiming Zhou & Ruyang Wang & Sunpei Hu & Hongliang Li & Ming Zuo & Yuan Kong & Jun Bao & Jie Zeng, 2022. "Selectively anchoring single atoms on specific sites of supports for improved oxygen evolution," Nature Communications, Nature, vol. 13(1), pages 1-10, December.
    2. Jie Wei & Hua Tang & Li Sheng & Ruyang Wang & Minghui Fan & Jiale Wan & Yuheng Wu & Zhirong Zhang & Shiming Zhou & Jie Zeng, 2024. "Site-specific metal-support interaction to switch the activity of Ir single atoms for oxygen evolution reaction," Nature Communications, Nature, vol. 15(1), pages 1-9, December.

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