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  • An up-scalable solid-state approach to synthesize iridium nanoparticles on ato for water splitting [Elektronski vir]
    Sadeghi, Ebrahim ...
    Proton exchange membrane water electrolysis (PEMWE) technology commercialization strongly relies on developing efficient and cost-effective anode catalysts. One key challenge is the high cost ... associated with IrO2, which can be mitigated by reducing iridium (Ir) loading. A promising approach to achieving this is using a conductive support material to anchor Ir/IrO2. In this study, we explored depositing metallic Ir on antimony-doped tin oxide (ATO) using a solid-state method. This approach is straightforward and time-efficient. Among four samples with 50 wt % Ir loading, one prepared with NaOH in 100% ethanol (Ir/ATO-NE) exhibited the highest specific oxygen evolution reaction (OER) performance. The Ir/ATO-NE catalyst achieved 340 A gIr–1 at 1.6 V (versus RHE), surpassing a commercial IrO2 catalyst, which showed 282 A gIr–1. Additionally, Ir/ATO-NE demonstrated the lowest Tafel slope, indicating enhanced oxygen evolution kinetics and long-term durability comparable to commercial catalysts. Electron microscopy revealed uniform Ir nanoparticle (NP) sizes and a complete layer of Ir NPs on the support, in contrast to other samples. This study introduces a synthesis protocol for Ir catalysts that is efficient, simple, and effective for oxygen evolution in acidic media.
    Vir: ACS applied materials & interfaces [Elektronski vir]. - ISSN 1944-8252 (Vol. 17, iss. 10, Feb. 2025, str. 15423-15435)
    Vrsta gradiva - e-članek ; neleposlovje za odrasle
    Leto - 2025
    Jezik - angleški
    COBISS.SI-ID - 263250947

    Povezava(-e):

    https://pubs.acs.org/doi/10.1021/acsami.4c21299
    DOI

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