20.500.12556/DKUM-88513 Selection on antimony-doped tin oxide (ATO) as an efficient support for iridium-based oxygen evolution reaction (OER) catalyst in acidic media Reducing the iridium content while preserving high OER activity is an important prerequisite for the progress of inexpensive anodic water splitting electrocatalysts in low pH medium. Here we report the effects of bulk and surface structures of antimony doped tin oxide (ATO) supports on the ATO supported Ir-based electrocatalyst’s activity for oxygen evolution reaction (OER) in acidic media. Ability of the ATO supports to anchor the Ir nanoparticles, measured as the fraction of Ir species from reaction bath landed on ATO support (conversion efficiency; η c ), is found to be strongly dependent on its surface chemistry, characterized in terms of presence of surface oxygen groups (O surface ). Both O surface content and electronic conductivity of ATOs show strong influence on OER activity. In general, high conductivity and low O surface though low O surface may compromise η c content are preferred for high OER activity, . The optimal catalyst demonstrates superior OER activity of 777 A g 1 , 2.5 times that of the state-of-the-art commercial catalyst at 1.65 V vs. RHE. Further, the synthesized catalysts exhibit durability comparable to that of the commercial counterpart. true false true Elsevier Sequoia S.A. Angleški jezik Angleški jezik https://www.sciencedirect.com/journal/materials-chemistry-and-physics Članek v reviji 2024-05-08 10:41:25 2024-05-08 10:41:27 2026-01-06 11:59:54 0000-00-00 00:00:00 2023 0 0 str. 128192-1-128192-11 Vol. 308 2023 0000-00-00 Zaloznikova Objavljeno NiDoloceno 2023-04-22 2023-07-15 2023-07-17 620.1/.2 161011971 10.1016/j.matchemphys.2023.128192 0254-0584 1-s2.0-S0254058423009008-main.pdf 1-s2.0-S0254058423009008-main.pdf 1 D7E2C7BBFBBC6765DD2290A5C2F24419 304b473cf251d7dbc1f6ea40c3dff5744282abfe7b3837b14bde9c48bae2ce19 7e8561b6-0d17-11ef-9ef1-00155d000105 https://dk.um.si/Dokument.php?lang=slv&id=179102 https://www.sciencedirect.com/science/article/pii/S0254058423009008?via%3Dihub 0 8d0a75ba-0d17-11ef-9ef1-00155d000105 https://dk.um.si/Dokument.php?lang=slv&id=179103 Fakulteta za kemijo in kemijsko tehnologijo 0 0 0