Platinum hydride formation during cathodic corrosion in aqueous solutions

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61388955%3A_____%2F25%3A00605493" target="_blank" >RIV/61388955:_____/25:00605493 - isvavai.cz</a>

Výsledek na webu

<a href="https://www.nature.com/articles/s41563-024-02080-y" target="_blank" >https://www.nature.com/articles/s41563-024-02080-y</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1038/s41563-024-02080-y" target="_blank" >10.1038/s41563-024-02080-y</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Platinum hydride formation during cathodic corrosion in aqueous solutions

Popis výsledku v původním jazyce

Cathodic corrosion is an electrochemical phenomenon that etches metals at moderately negative potentials. Although cathodic corrosion probably occurs by forming a metal-containing anion, such intermediate species have not yet been observed. Here, aiming to resolve this long-standing debate, our work provides such evidence through X-ray absorption spectroscopy. High-energy-resolution X-ray absorption near-edge structure experiments are used to characterize platinum nanoparticles during cathodic corrosion in 10 mol l-1 NaOH. These experiments detect minute chemical changes in the Pt during corrosion that match first-principles simulations of X-ray absorption spectra of surface platinum multilayer hydrides. Thus, this work supports the existence of hydride-like platinum during cathodic corrosion. Notably, these results provide a direct observation of these species under conditions where they are highly unstable and where prominent hydrogen bubble formation interferes with most spectroscopy methods. Therefore, this work identifies the elusive intermediate that underlies cathodic corrosion.

Název v anglickém jazyce

Platinum hydride formation during cathodic corrosion in aqueous solutions

Popis výsledku anglicky

Cathodic corrosion is an electrochemical phenomenon that etches metals at moderately negative potentials. Although cathodic corrosion probably occurs by forming a metal-containing anion, such intermediate species have not yet been observed. Here, aiming to resolve this long-standing debate, our work provides such evidence through X-ray absorption spectroscopy. High-energy-resolution X-ray absorption near-edge structure experiments are used to characterize platinum nanoparticles during cathodic corrosion in 10 mol l-1 NaOH. These experiments detect minute chemical changes in the Pt during corrosion that match first-principles simulations of X-ray absorption spectra of surface platinum multilayer hydrides. Thus, this work supports the existence of hydride-like platinum during cathodic corrosion. Notably, these results provide a direct observation of these species under conditions where they are highly unstable and where prominent hydrogen bubble formation interferes with most spectroscopy methods. Therefore, this work identifies the elusive intermediate that underlies cathodic corrosion.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10403 - Physical chemistry

Projekt

—

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2025

Kód důvěrnosti údajů

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

Název periodika

Nature Materials

ISSN

1476-1122

e-ISSN

1476-4660

Svazek periodika

24

Číslo periodika v rámci svazku

JAN 2025

Stát vydavatele periodika

US - Spojené státy americké

Počet stran výsledku

7

Strana od-do

574-580

Kód UT WoS článku

001401872400001

EID výsledku v databázi Scopus

2-s2.0-85217263025