Počet záznamů: 1
Local structure and composition of PtRh nanoparticles produced through cathodic corrosion
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SYSNO ASEP 0506647 Druh ASEP J - Článek v odborném periodiku Zařazení RIV J - Článek v odborném periodiku Poddruh J Článek ve WOS Název Local structure and composition of PtRh nanoparticles produced through cathodic corrosion Tvůrce(i) Hersbach, T.J.P. (NL)
Kortlever, R. (NL)
Lehtimäki, Matti (UFCH-W)
Krtil, Petr (UFCH-W) RID, ORCID
Koper, M.T.M. (NL)Zdroj.dok. Physical Chemistry Chemical Physics. - : Royal Society of Chemistry - ISSN 1463-9076
Roč. 19, č. 16 (2017), s. 10301-10308Poč.str. 8 s. Jazyk dok. eng - angličtina Země vyd. GB - Velká Británie Klíč. slova ag alloy nanoparticles ; oxygen reduction ; au-ag ; heterogeneous catalysis ; metallic nanoparticles ; electrocatalysts ; bulk ; evolution ; hydrosols ; ifeffit Vědní obor RIV CF - Fyzikální chemie a teoretická chemie Obor OECD Physical chemistry Způsob publikování Open access Institucionální podpora UFCH-W - RVO:61388955 UT WOS 000400117700011 EID SCOPUS 85019969389 DOI 10.1039/c7cp01059a Anotace Alloy nanoparticles fulfill an important role in catalysis. As such, producing them in a simple and clean way is much desired. A promising alloy nanoparticle production method is cathodic corrosion, which generates particles by applying an AC voltage to an alloy electrode. However, this harsh AC potential program might affect the final elemental distribution of the nanoparticles. In this work, we address this issue by characterizing the time that is required to create 1 mu mol of Rh, Pt12Rh88, Pt55Rh45 and Pt nanoparticles under various applied potentials. The corrosion time measurements are complemented by structural characterization through transmission electron microscopy, X-ray diffraction and X-ray absorption spectroscopy. The corrosion times indicate that platinum and rhodium corrode at different rates and that the cathodic corrosion rates of the alloys are dominated by platinum. In addition, the structure-sensitive techniques reveal that the elemental distributions of the created alloy nanoparticles indeed exhibit small degrees of elemental segregation. These results indicate that the atomic alloy structure is not always preserved during cathodic corrosion. Pracoviště Ústav fyzikální chemie J.Heyrovského Kontakt Michaela Knapová, michaela.knapova@jh-inst.cas.cz, Tel.: 266 053 196 Rok sběru 2020 Elektronická adresa http://hdl.handle.net/11104/0297853
Počet záznamů: 1