Gorazd Koderman Podboršek (Avtor), Luka Suhadolnik (Avtor), Anja Lončar (Avtor), Marjan Bele (Avtor), Armin Hrnjić (Avtor), Živa Marinko (Avtor), Miran Gaberšček (Avtor), Nejc Hodnik (Avtor), Primož Jovanovič (Avtor), Janez Kovač (Avtor), Anton Kokalj (Avtor), Lea Gašparič (Avtor), Angela Šurca Vuk (Avtor), Ana Rebeka Kamšek (Avtor), Goran Dražić (Avtor)

Povzetek

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.

Ključne besede

elektrokemija;elektrokataliza;nanodelci;iridij;kisik;

Podatki

Jezik: Angleški jezik
Leto izida:
Tipologija: 1.01 - Izvirni znanstveni članek
Organizacija: KI - Kemijski inštitut
Založnik: ACS Publications
UDK: 544.5/.6
COBISS: 135522051 Povezava se bo odprla v novem oknu
ISSN: 2155-5435
Št. ogledov: 34
Št. prenosov: 9
Ocena: 0 (0 glasov)
Metapodatki: JSON JSON-RDF JSON-LD TURTLE N-TRIPLES XML RDFA MICRODATA DC-XML DC-RDF RDF

Ostali podatki

Sekundarni jezik: Slovenski jezik
Sekundarne ključne besede: elektrokemija;elektrokataliza;nanodelci;iridij;kisik;
Vrsta dela (COBISS): Članek v reviji
Komentar vira: Nasl. z nasl. zaslona; Opis vira z dne 28. 12. 2022;
Strani: str. 15135–15145
Letnik: ǂVol. ǂ12
Zvezek: ǂiss. ǂ24
Čas izdaje: Nov. 28, 2022
DOI: 10.1021/acscatal.2c04160
ID: 26352466