Reduced graphene oxide supported FePt alloy nanoparticles with high electrocatalytic performance for methanol oxidation

Polarised infrared microspectroscopy of edge-oriented graphene oxide papers

“…The 1740 cm -1 band is extensively known to derive from the carbonyl stretch and has been assigned to species at the edge of GO sheets, primarily carboxyls [8,16,17,20,22,25,[27][28][29][30] as well as contributions from ketones [8,16,17] and quinones [17]. Our polarised spectra (figure 5) show a small degree of out of plane polarisation, and is consistent with edge carboxyls.…”

“…Our polarisation measurements reveal that there are in fact three narrow bands, with the central band at 1255 cm -1 polarised strongly in-plane, while the 1280 cm -1 and 1230 cm -1 bands are preferentially out of plane. A band around 1217-1245 cm -1 has been previously assigned to an epoxide stretch [16,21,25,27,29,35], the C-O stretch in phenols [17,26,33] or the in-plane bending mode of ketones [8]. In the work of Szabo et al [17] the narrow bands around 1250 cm -1 only emerge above the broad absorbance baseline after several stages of oxidation, whereas the stronger bands assigned to phenols appear at low oxidation and do not significantly increase on further oxidisation.…”

“…The strong band at 1630 cm -1 has been assigned to the O-H deformation mode of residual adsorbed water in graphene and graphite oxides [17,[20][21][22]32], unoxidised graphitic domains (aromatic C=C stretch) [33] or a combination of the two [8,26,27,31] along with possible smaller contributions from more exotic species [8]. The bandshape and intensity depends on the water content of the sample, and for high water contents (as in our samples) is dominated by water.…”

Graphene‐Supported Metal Nanostructures with Controllable Size and Shape as Advanced Electrocatalysts for Fuel Cells

“…In addition to metal nanoclusters, much work has been done on the synthesis of graphene-supported monometallic (Au [53], Pt [54][55][56][57][58], and Pd [27,59]) or metal alloy (PtPd [33,36,60,61], PtRu [62][63][64], PtAu [12,28,35,65], PdAg [66,67], PtFe [68,69], PtCo [14,70,71], PtNi [72][73][74][75], PtPdAu [76,77]) NPs and their electrocatalytic activities for fuel cells [42]. Among the alloy nanostructures, PtRu NPs have received special attention because of their high catalytic performance as both anodic and cathodic catalysts.…”

Graphene Oxide Modified Ag2O Nanocomposites with Enhanced Photocatalytic Activity under Visible‐Light Irradiation

“…[19][20][21][22] Recently, the emergence of graphene has opened up an exciting new field in science and technology with continuously growing academic and technological impetus. [23][24][25] In particular, combining graphene with photocatalysts to enhance their photocatalytic performance has attracted considerable attention. [26][27][28][29][30][31] Graphene oxide (GO) is the oxidative form of graphene with copious oxygen functional groups on the basal planes and edges.…”