20.500.12556/DiRROS-24943 Microwaves assisted synthesis of IrRu alloy nanoparticles for acidic oxygen evolution reaction a balance between activity and stability Microwaves assisted synthesis of IrRu alloy nanoparticles for acidic oxygen evolution reaction: a balance between activity and stability Under the background of renewable hydrogen generation through proton exchange membrane water electrolysis, here we report highly efficient and stable iridium (Ir) and ruthenium (Ru) alloy based electrocatalysts for the acidic OER. The electrocatalysts were synthesized by a facile microwave-assisted sodium borohydride (MW-NaBH4) reduction method with 98 % reaction conversion efficiency. The ultrafine IrRu alloy nanoparticles have shown transfer of electron from Ru to Ir and d-band structure modification. Benefiting from the electron transfer between the active metals, the synthesized electrocatalysts have exhibited superior OER performance in acidic electrolyte. Among the combinations, the Ir-Ru (30:70) demonstrated mass activity as high as 481 A g−1 and requiring overpotential of 270 mV to deliver a current density of 10 mA cm−2, better performance compared to other synthesized and commercial electrocatalyst. Further, Ir-Ru (50:50) have exhibited the best OER performance of 425 A g−1 mass activity, double to that of commercial IrO2 and retained around 50 % of their initial current density (IrO2 remains only 31 %) in long-term AST tests. Based on the solution electrochemical performance such as low overpotential (310 mV vs. 330 for IrO2), high mass activity and long-term stability the Ir-Ru (50:50) alloy combination can be considered a promising electrocatalyst for PEMWE applications. electrocatalyst acidic oxygen evolution reaction water electrolysis durability elektrokatalizator elektroliza vode true false false Elsevier Nizozemska Angleški jezik Slovenski jezik © 2025 The Author(s). Neznano 2026-01-05 10:58:08 2026-01-05 10:58:09 2026-01-06 03:43:48 0000-00-00 00:00:00 2025 0 0 Nasl. z nasl. zaslona; Soavtor iz Slovenije: Sašo Gyergyek; Opis vira z dne 7. 5. 2025; str. 1-10 Vol. 703, [article no.] 163405 Sep. 2025 0000-00-00 Zaloznikova Objavljeno NiDoloceno 2025-02-19 2025-04-29 2025-05-01 54 1873-5584 10.1016/j.apsusc.2025.163405 235036675 https://www.sciencedirect.com/science/article/pii/S0169433225011201?via%3Dihub 1 0c7b7103-ea1d-11f0-94a7-001a4af901a5 https://dirros.openscience.si/Dokument.php?lang=slv&id=37362 RAZ_Khan_Inayat_Ali_2025.pdf RAZ_Khan_Inayat_Ali_2025.pdf 1 3EC357138D6C184A758960E8C4A90B9B dc6b08540bb589c2a7178146f4546aea4a7ffb07234ebf87de4136fbc5e92a4b 83e29475-ea1d-11f0-94a7-001a4af901a5 https://dirros.openscience.si/Dokument.php?lang=slv&id=37363 Institut Jožef Stefan 0 0 0