Počet záznamů: 1

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

SYSNO ASEP	0340654
Druh ASEP	J - Článek v odborném periodiku
Zařazení RIV	J - Článek v odborném periodiku
Poddruh J	Článek ve WOS
Název	Local Structure of Nanocrystalline Ru1-xNixO2-delta Dioxide and Its Implications for Electrocatalytic Behavior-An XPS and XAS Study
Tvůrce(i)	Petrykin, Valery (UFCH-W) Bastl, Zdeněk (UFCH-W)_{RID, ORCID} Franc, Jiří (UFCH-W) Macounová, Kateřina (UFCH-W)_RID Makarova, Marina (UFCH-W) Mukerjee, S. (US) Ramaswamy, N. (US) Spirovová, Ilona (UFCH-W)_RID Krtil, Petr (UFCH-W)_{RID, ORCID}
Zdroj.dok.	Journal of Physical Chemistry C. - : American Chemical Society - ISSN 1932-7447 Roč. 113, č. 52 (2009), s. 21657-21666
Poč.str.	10 s.
Jazyk dok.	eng - angličtina
Země vyd.	US - Spojené státy americké
Klíč. slova	oxygen evolution reaction ; nanocrystalline ; XPS study
Vědní obor RIV	CF - Fyzikální chemie a teoretická chemie
CEP	IAA400400906 GA AV ČR - Akademie věd
CEZ	AV0Z40400503 - UFCH-W (2005-2011)
UT WOS	000272936400031
DOI	10.1021/jp904935e
Anotace	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.
Pracoviště	Ústav fyzikální chemie J.Heyrovského
Kontakt	Michaela Knapová, michaela.knapova@jh-inst.cas.cz, Tel.: 266 053 196
Rok sběru	2010

Počet záznamů: 1