Repozitorij Univerze v Novi Gorici

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Naslov:Electrochemical dissolution of iridium and iridium oxide particles in acidic media : transmission electron microscopy, electrochemical flow cell coupled to inductively coupled plasma mass spectrometry and X-ray absorption spectroscopy study
Avtorji:ID Jovanovič, Primož (Avtor)
ID Hodnik, Nejc (Avtor)
ID Ruiz-Zepeda, Francisco (Avtor)
ID Arčon, Iztok (Avtor)
ID Jozinović, Barbara (Avtor)
ID Zorko, Milena (Avtor)
ID Bele, Marjan (Avtor)
ID Šala, Martin (Avtor)
ID Šelih, Vid Simon (Avtor)
ID Hočevar, Samo B. (Avtor)
ID Gaberšček, Miran (Avtor)
Datoteke: Gradivo nima datotek, ki so prostodostopne za javnost. Gradivo je morda fizično dosegljivo v knjižnici fakultete, zalogo lahko preverite v COBISS-u. Povezava se odpre v novem oknu
Jezik:Angleški jezik
Vrsta gradiva:Delo ni kategorizirano
Tipologija:1.01 - Izvirni znanstveni članek
Organizacija:UNG - Univerza v Novi Gorici
Opis:Iridium based particles as the most promising proton exchange membrane electrolyser electrocatalysts were investigated by transmission electron microscopy (TEM), and by coupling of electrochemical flow cell (EFC) with online inductively coupled plasma mass spectrometer (ICP-MS). Additionally, a thin-film rotating disc electrode (RDE), an identical location transmission and scanning electron microscopy (IL-TEM and IL-SEM) as well as an X-ray absorption spectroscopy (XAS) studies have been performed. Extremely sensitive online time-and potential-resolved electrochemical dissolution profiles revealed that iridium particles dissolved already well below oxygen evolution reaction (OER) potentials, presumably induced by iridium surface oxidation and reduction processes, also referred to as transient dissolution. Overall, thermally prepared rutile type IrO2 particles (T-IrO2) are substantially more stable and less active in comparison to as prepared metallic (A-Ir) and electrochemically pretreated (E-Ir) analogues. Interestingly, under OER relevant conditions E-Ir particles exhibit superior stability and activity owing to the altered corrosion mechanism where the formation of unstable Ir(>IV) species is hindered. Due to the enhanced and lasting OER performance, electrochemically pre-oxidized E-Ir particles may be considered as the electrocatalyst of choice for an improved low temperature electrochemical hydrogen production device, namely a proton exchange membrane electrolyser.
Ključne besede:Iridium Oxide Par-ticles, Electrochemical Dissolution of Iridium, Ir L3-edge XANES
Leto izida:2017
Št. strani:Str. 1-12
Številčenje:1
PID:20.500.12556/RUNG-3216-df022b97-612e-6b39-349c-8341d10d7635 Novo okno
COBISS.SI-ID:6203674 Novo okno
ISSN pri članku:0002-7863
DOI:10.1021/jacs.7b08071 Novo okno
NUK URN:URN:SI:UNG:REP:MF97OCXH
Datum objave v RUNG:23.08.2017
Število ogledov:3996
Število prenosov:0
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Skupna ocena:(0 glasov)
Vaša ocena:Ocenjevanje je dovoljeno samo prijavljenim uporabnikom.
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Gradivo je del revije

Naslov:Journal of the American Chemical Society
Skrajšan naslov:J. Am. Chem. Soc.
Založnik:American Chemical Society
ISSN:0002-7863
COBISS.SI-ID:5281029 Novo okno

Sekundarni jezik

Jezik:Ni določen
Ključne besede:elektrokataliza, elektrolizer, iridij, evolucija kisika, transmisijska elektronska mikroskopija, ICP-MS, XAS, EXAFS


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