Simultaneous reduction, exfoliation and functionalization of graphite oxide into a graphene-platinum nanoparticle hybrid for methanol oxidation

Abstract

We developed a single step thermal method to synthesize platinum nanoparticle functionalized graphene sheets (Pt-G) through the thermal treatment of graphite oxide (GO) with platinum acetylacetonate (Pt(acac) 2 ). The loading concentration of platinum nanoparticles (Pt NPs) on graphene is about 22.3 wt%. We investigate the Pt NP functionalization and the reduction effects of GO by scanning electron microscopy, transmission electron microscopy, X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), thermogravimetric analysis and Raman spectroscopy. The results lead to insights into the formation of Pt-G starting from GO upon increasing the temperature. XPS and XRD analysis confirm that the platinum nanoparticle deposition is accompanied by the reduction and exfoliation of GO. Electrochemical studies reveal that Pt-G shows excellent activity and stability towards the methanol oxidation reaction.

Simple and scalable preparation of reduced graphene oxide–silver nanocomposites via rapid thermal treatment

“…In Fig. 2a, GO portrays its signature peak at 10.51, while the weak diffraction peak at 22.51 is due to the removal of surface oxy-functional groups and the restacking of reduced GO sheets during the drying process of GO [15]. The small degree of oxide functional group removal from GO is also indicated by a small hump at 151.…”

Reduced graphene oxide-titania nanocomposite-modified photoanode for efficient dye-sensitized solar cells

“…The diffraction peak for GO at 9.8°disappeared in the rGO pattern ( Figure 1c), indicating that the GO had been converted to rGO after the rapid thermal treatment, and this observation is in good agreement with the absorption studies ( Figure 1b). However, a weak diffraction peak was observed at 25.9°for rGO, as a result of the removal of surface oxy-functional groups and the restacking of reduced GO sheets during the drying process for GO [27]. The Dye-sensitized solar cells L. S. Pei et al…”

A Review on Reducing Graphene Oxide for Band Gap Engineering

“…A facile nanoparticle decoration of GO with platinum acetylacetonate was shown without the need of high temperatures or surfactants (Figure 7). Surface functionalization through a low temperature treatment (~500°C in nitrogen gas for 2 hours) resulted in exfoliation of reduced graphene sheets (Mayavan et al, 2012). In addition, rapid synthesis of few-layered graphene sheets were obtained by hydrogen induced reduction-exfoliation of GO at low temperatures (~200°C) (Kaniyoor et al, 2010).…”