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Improving the Oxygen Evolution Activity and Stability of Nb-Doped TiO2-Supported RuO2 by a SnO2 Interlayer: A Model Catalyst Study on Single-Crystal Oxide Heterostructures

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Download Hi-Res ImageDownload to MS-PowerPointCite This:ACS Catal. 2023, 13, 17, 11433-11440
    Research Article

    Improving the Oxygen Evolution Activity and Stability of Nb-Doped TiO2-Supported RuO2 by a SnO2 Interlayer: A Model Catalyst Study on Single-Crystal Oxide Heterostructures
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    • Naoto Todoroki*
      Naoto Todoroki
      Graduate School of Environmental Studies, Tohoku University, 6-6-02, Aramaki Aza Aoba, Aoba-ku, Sendai, Miyagi 980-8579, Japan
      *Email: [email protected]
      More by Naoto Todoroki
      Orcidhttps://orcid.org/0000-0003-4811-6398
    • Ryutaro Kudo
      Ryutaro Kudo
      Graduate School of Engineering, Tohoku University, 2-1-1 Katahira, Aoba-ku, Sendai, Miyagi 980-8577, Japan
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    • Kenta Hayashi
      Kenta Hayashi
      Graduate School of Environmental Studies, Tohoku University, 6-6-02, Aramaki Aza Aoba, Aoba-ku, Sendai, Miyagi 980-8579, Japan
      More by Kenta Hayashi
      Orcidhttps://orcid.org/0000-0002-9638-7232
    • Mizuho Yokoi
      Mizuho Yokoi
      Graduate School of Engineering, Tohoku University, 2-1-1 Katahira, Aoba-ku, Sendai, Miyagi 980-8577, Japan
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    • Naomi Naraki
      Naomi Naraki
      Graduate School of Environmental Studies, Tohoku University, 6-6-02, Aramaki Aza Aoba, Aoba-ku, Sendai, Miyagi 980-8579, Japan
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    • Toshimasa Wadayama
      Toshimasa Wadayama
      Graduate School of Environmental Studies, Tohoku University, 6-6-02, Aramaki Aza Aoba, Aoba-ku, Sendai, Miyagi 980-8579, Japan
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    ACS Catalysis

    Cite this: ACS Catal. 2023, 13, 17, 11433–11440
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    https://doi.org/10.1021/acscatal.3c01525
    Published August 15, 2023
    Copyright © 2023 American Chemical Society
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    Abstract

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    The introduction of a SnO2(110) interlayer remarkably enhances the oxygen evolution reaction (OER) activity and electrochemical stability of RuO2/Nb-doped TiO2(110) single-crystal oxide heterostructure. The SnO2 interlayer reduces the OER overpotential of RuO2/Nb:TiO2(110) by 25 and 55 mV before and after a chronopotentiometry (CP) measurement of 0.5 mA cm–2 for 2 h, respectively. The addition of the SnO2 interlayer significantly reduces the interfacial resistance between RuO2 and TiO2 in the as-pristine state and the resistance remained nearly unchanged even after the CP. Additionally, the SnO2 interlayer stabilizes the interface between surface RuO2(110) and substrate TiO2(110) under OER, suppressing structural degradation such as nanovoid generation at the RuO2/TiO2 interface. Hence, the SnO2 interlayer is correlated with the enhanced OER activity and stability of the RuO2/Nb:TiO2(110) model catalysts because it mitigates both electrical and structural mismatches of the surface RuO2 layer and the TiO2 substrate.

    Copyright © 2023 American Chemical Society

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    Supporting Information

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    The Supporting Information is available free of charge at https://pubs.acs.org/doi/10.1021/acscatal.3c01525.

    • Lattice mismatch of rutile-type metal oxides, XPS spectra, S-numbers, cyclic voltammograms, double-layer capacitance-normalized LSV curves, stability under potential cycle loading, influence of Nb doping, and comparison with IrO2/TiO2 (PDF)

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    Cited By

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    This article is cited by 2 publications.

    1. Ryoma Sakata, Ouga Ishibashi, Takafumi Kanauchi, Hiroyuki Kasumi, Naoto Todoroki, Satoru Matsumoto, Koki Ishigame, Toshimasa Wadayama. Efficient Ozone Evolution Anode of Tantalum Nitride with Cubic Crystal Structure. ACS Sustainable Chemistry & Engineering 2024, 12 (31) , 11590-11596. https://doi.org/10.1021/acssuschemeng.4c02246
    2. Shahid Zaman, Mohmmad Khalid, Samaneh Shahgaldi. Advanced Electrocatalyst Supports for Proton Exchange Membrane Water Electrolyzers. ACS Energy Letters 2024, 9 (6) , 2922-2935. https://doi.org/10.1021/acsenergylett.4c00275
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    ACS Catalysis

    Cite this: ACS Catal. 2023, 13, 17, 11433–11440
    Click to copy citationCitation copied!
    https://doi.org/10.1021/acscatal.3c01525
    Published August 15, 2023
    Copyright © 2023 American Chemical Society
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