Deutsch
 
Hilfe Datenschutzhinweis Impressum
  DetailsucheBrowse

Datensatz

DATENSATZ AKTIONENEXPORT
Zur Ablage hinzufügen
  Lokale TagsFreigabegeschichteDetailsÜbersicht

Freigegeben
Zeitschriftenartikel

Effect of the Specific Surface Sites on the Reducibility of α-Fe2O3/Graphene Composites by Hydrogen

MPG-Autoren
/persons/resource/persons21743

Knop-Gericke,  Axel
Inorganic Chemistry, Fritz Haber Institute, Max Planck Society;

Externe Ressourcen
Es sind keine externen Ressourcen hinterlegt
Volltexte (beschränkter Zugriff)
Für Ihren IP-Bereich sind aktuell keine Volltexte freigegeben.
Volltexte (frei zugänglich)
Es sind keine frei zugänglichen Volltexte in PuRe verfügbar
Ergänzendes Material (frei zugänglich)
Es sind keine frei zugänglichen Ergänzenden Materialien verfügbar
Zitation

Papaefthimiou, V., Florea, I., Baaziz, W., Janowska, I. M., Begin, D., Doh, W. H., et al. (2013). Effect of the Specific Surface Sites on the Reducibility of α-Fe2O3/Graphene Composites by Hydrogen. The Journal of Physical Chemistry C, 117(39), 20313-20319. doi:10.1021/jp4067718.


Zitierlink: https://hdl.handle.net/11858/00-001M-0000-0014-4F9E-8
Zusammenfassung
The reducibility of iron oxide nanoparticles (NPs) supported over few-layer thick graphite upon annealing in hydrogen is investigated by near ambient pressure X-ray photoelectron spectroscopy (NAP-XPS), near-edge X-ray absorption fine structure (NEXAFS), electron energy loss spectroscopy (EELS), and high resolution transmission electron microscopy (HR-TEM). It is found that the stability of the iron oxide NPs toward reduction is enhanced by the interaction with the graphene nanosheets, as compared to the bulk iron oxide. Post-annealing TEM micrographs reveal the existence of both core/shell and homogeneous iron oxide NPs, with the latter forming irregular trenches into the graphene sheets. EELS analysis and TEM images clearly demonstrate that the reducibility of iron oxide particles depends on the specific graphene site on which they are attached. Furthermore, we show that graphene etching can be mediated by iron oxide NPs at relatively mild reduction conditions.