Local Structure of Nanocrystalline Ru1-xNixO2-delta Dioxide and Its Implications for Electrocatalytic Behavior-An XPS and XAS Study

Kód výsledku v IS VaVaI

RIV/61388955:_____/09:00340654 - isvavai.cz

Výsledek na webu

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DOI - Digital Object Identifier

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Jazyk výsledku

angličtina

Název v původním jazyce

Local Structure of Nanocrystalline Ru1-xNixO2-delta Dioxide and Its Implications for Electrocatalytic Behavior-An XPS and XAS Study

Popis výsledku v původním jazyce

Chemical composition, crystal structure, as well as short-range atomic arrangement of nanocrystalline Ru1-xNixO2-delta oxides with x ranging between 0 and 0.3 were studied using energy dispersive X-ray spectroscopy (EDX), X-ray photoelectron spectroscopy(XPS), and X-ray absorption spectroscopy (XAS). The prepared materials form single-phase nanocrystals with rutile structure. Regardless of the chemical composition, the surface of Ru1-xNixO2-delta oxides is Ni-enriched with respect to overall chemical composition. According to both XPS and XANES, the oxidation state of Ru remains +4 in the studied materials. Ni ions are present in both divalent and trivalent states with the fraction of trivalent ions decreasing with increasing Ni content. The refinement of local structure using EXAFS data based on Ru-K and Ni-K edge absorption spectra shows that Ru preserves local arrangement characteristic for ruthenium dioxide.

Název v anglickém jazyce

Local Structure of Nanocrystalline Ru1-xNixO2-delta Dioxide and Its Implications for Electrocatalytic Behavior-An XPS and XAS Study

Popis výsledku anglicky

Chemical composition, crystal structure, as well as short-range atomic arrangement of nanocrystalline Ru1-xNixO2-delta oxides with x ranging between 0 and 0.3 were studied using energy dispersive X-ray spectroscopy (EDX), X-ray photoelectron spectroscopy(XPS), and X-ray absorption spectroscopy (XAS). The prepared materials form single-phase nanocrystals with rutile structure. Regardless of the chemical composition, the surface of Ru1-xNixO2-delta oxides is Ni-enriched with respect to overall chemical composition. According to both XPS and XANES, the oxidation state of Ru remains +4 in the studied materials. Ni ions are present in both divalent and trivalent states with the fraction of trivalent ions decreasing with increasing Ni content. The refinement of local structure using EXAFS data based on Ru-K and Ni-K edge absorption spectra shows that Ru preserves local arrangement characteristic for ruthenium dioxide.

Druh

J_x - Nezařazeno - Článek v odborném periodiku (Jimp, Jsc a Jost)

CEP obor

CF - Fyzikální chemie a teoretická chemie

OECD FORD obor

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Projekt

IAA400400906: Nanokrystalické oxidy pro selektivní anodickou elektrokatalýzu

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)
Z - Vyzkumny zamer (s odkazem do CEZ)

Rok uplatnění

2009

Kód důvěrnosti údajů

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

Název periodika

Journal of Physical Chemistry C

ISSN

1932-7447

e-ISSN

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Svazek periodika

113

Číslo periodika v rámci svazku

52

Stát vydavatele periodika

US - Spojené státy americké

Počet stran výsledku

10

Strana od-do

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Kód UT WoS článku

000272936400031

EID výsledku v databázi Scopus

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