ArticleRSC advances2026
Ir-based electrocatalysts for facile ethanol oxidation reaction: effect of support, loading, and alloying with Ru.
Article in RSC advances, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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Abstract
Direct ethanol fuel cells (DEFCs) offer a compelling pathway for sustainable energy conversion, yet sluggish kinetics and severe surface poisoning of conventional platinum-based anode catalysts hinder their practical adoption. Here, we present a systematic investigation of iridium-based electrocatalysts for the ethanol oxidation reaction (EOR) in acidic media, deconvoluting the independent and cooperative contributions of support identity, metal loading, and Ru alloying within a unified experimental framework. Structural and surface characterization by XRD, TEM, FT-IR, and XPS confirmed successful catalyst synthesis. It revealed systematic changes in the electronic environment of Ir upon support substitution and Ru alloying. ATO-supported Ir exhibited lower EOR activity than Ir/C, while increasing the Ir loading to 17-33 wt% partially recovered the catalytic performance. Ru alloying on carbon produced the strongest enhancement in the low-potential region, shifting the EOR onset potential to ∼0.08 V
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