Structural development on Ru and RuO2 electrodes during oxygen evolution – a soft X-ray absorption spectroscopy approach

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61388955%3A_____%2F24%3A00599071" target="_blank" >RIV/61388955:_____/24:00599071 - isvavai.cz</a>

Výsledek na webu

<a href="https://hdl.handle.net/11104/0356631" target="_blank" >https://hdl.handle.net/11104/0356631</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.electacta.2024.145066" target="_blank" >10.1016/j.electacta.2024.145066</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Structural development on Ru and RuO2 electrodes during oxygen evolution – a soft X-ray absorption spectroscopy approach

Popis výsledku v původním jazyce

Time resolved in-situ X-ray absorption spectroscopy (XAS) in soft X-ray region was used to characterize polarized interphase on Ru and Ru oxide based electrodes under oxygen evolution reaction (OER) conditions. XAS spectra were used to align the type and population of oxygen-containing species formed at electrodes at anodic potentials with local electronic structure of the OER catalyst. The soft XAS data do not identify a single rate limiting process for OER at potentials negative to 1.7 V vs. RHE. Individual intermediates of the oxygen evolution process coexist at the surface at potentials preceding the actual OER onset. The OER is accompanied with redistribution of the electron density resulting for a start of the catalytic cycle reflecting the transfer of the electrons from water to the external circuit during catalyzed water oxidation. The observed spectral behavior indicates a confinement of the OER to the coordination unsaturated sites (cus) at the surface.

Název v anglickém jazyce

Structural development on Ru and RuO2 electrodes during oxygen evolution – a soft X-ray absorption spectroscopy approach

Popis výsledku anglicky

Time resolved in-situ X-ray absorption spectroscopy (XAS) in soft X-ray region was used to characterize polarized interphase on Ru and Ru oxide based electrodes under oxygen evolution reaction (OER) conditions. XAS spectra were used to align the type and population of oxygen-containing species formed at electrodes at anodic potentials with local electronic structure of the OER catalyst. The soft XAS data do not identify a single rate limiting process for OER at potentials negative to 1.7 V vs. RHE. Individual intermediates of the oxygen evolution process coexist at the surface at potentials preceding the actual OER onset. The OER is accompanied with redistribution of the electron density resulting for a start of the catalytic cycle reflecting the transfer of the electrons from water to the external circuit during catalyzed water oxidation. The observed spectral behavior indicates a confinement of the OER to the coordination unsaturated sites (cus) at the surface.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10403 - Physical chemistry

Projekt

Výsledek vznikl pri realizaci vícero projektů. Více informací v záložce Projekty.

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2024

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

Electrochimica acta

ISSN

0013-4686

e-ISSN

1873-3859

Svazek periodika

507

Číslo periodika v rámci svazku

DEC 2024

Stát vydavatele periodika

GB - Spojené království Velké Británie a Severního Irska

Počet stran výsledku

11

Strana od-do

145066

Kód UT WoS článku

001327084900001

EID výsledku v databázi Scopus

2-s2.0-85204781152