20.500.12556/RUL-144316 Iridium stabilizes ceramic titanium oxynitride support for oxygen evolution reaction Decreasing iridium loading in the electrocatalyst presents a crucial challenge in the implementation of proton exchange membrane (PEM) electrolyzers. In this respect, fine dispersion of Ir on electrically conductive ceramic supports is a promising strategy. However, the supporting material needs to meet the demanding requirements such as structural stability and electrical conductivity under harsh oxygen evolution reaction (OER) conditions. Herein, nanotubular titanium oxynitride (TiON) is studied as a support for iridium nanoparticles. Atomically resolved structural and compositional transformations of TiON during OER were followed using a task-specific advanced characterization platform. This combined the electrochemical treatment under floating electrode configuration and identical location transmission electron microscopy (IL-TEM) analysis of an in-house-prepared Ir-TiON TEM grid. Exhaustive characterization, supported by density functional theory (DFT) calculations, demonstrates and confirms that both the Ir nanoparticles and single atoms induce a stabilizing effect on the ceramic support via marked suppression of the oxidation tendency of TiON under OER conditions. electrocatalysis oxygen evolution reaction anodic oxidation titanium oxynitride nanotubular support iridium nanoparticles IL-TEM nano lab approach single atoms electron correlation layers nanoparticles oxides transition metals elektrokemija elektrokataliza nanodelci iridij kisik true false true Angleški jezik Slovenski jezik Članek v reviji 2023-02-14 12:00:34 2023-02-14 12:00:35 2023-02-22 11:16:45 0000-00-00 00:00:00 2022 0 0 Str. 15135–15145 iss. 24 Vol. 12 2022 0000-00-00 Zaloznikova Objavljeno NiDoloceno 0000-00-00 0000-00-00 0000-00-00 544.5/.6 2155-5435 10.1021/acscatal.2c04160 135522051 acscatal.2c04160.pdf acscatal.2c04160.pdf 1 C60ACC2639702AAA856740089FB1D9B8 ec002f146c22d503bd5448809c61c609821c637fe52b97a9f5d7355a3043e035 cf04e80c-ac56-11ed-9c94-00155dcfd717 https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=166564 https://pubs.acs.org/doi/10.1021/acscatal.2c04160 1 7c0610b1-ac56-11ed-9c94-00155dcfd717 https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=166563 Fakulteta za kemijo in kemijsko tehnologijo 0 0 0