Platinum supported on reduced graphene oxide as a catalyst for hydrogenation of nitroarenes

Synthesis of platinum/graphene composites by a polyol method: The role of graphite oxide precursor surface chemistry

“…The diffraction peaks present at around 39.8°, 44.3°, 67.5°, and 81.6°are the indications of the formation of Pt NPs with a face-centered-cubic structure, corresponding to the (1 1 1), (2 0 0), (2 2 0), and (3 1 1) planes of Pt, respectively [35]. With the increased oxidation degree of the GOs, the Pt NPs size first decreases and then increases, as indicated by the diffraction peaks of Pt (1 1 1) [21]. The TEM images of the Pt/graphene composites show that the Pt NPs are well dispersed on the graphene nanosheets without forming aggregates (Figs.…”

“…Extensive investigations have confirmed that hexachloroplatinic acid (H 2 PtCl 6 ) and GO could be simultaneously reduced into Pt nanoparticles (Pt NPs) and graphene by ethylene glycol (EG), during which the Pt NPs were anchored to the graphene by chemical bonds and electrostatic interactions [17][18][19][20][21]. Furthermore, the glycolate anions produced by the oxidation of EG in alkaline solutions can serve as a stabilizing agent by adsorbing on the surface of the formed Pt NPs [17,22].…”

Selective hydrogenation of C C bond over N-doped reduced graphene oxides supported Pd catalyst

“…was observed in XRD patterns of graphene-based supports (Fig. 1a), which indicates that GO was reduced by partially removing surface oxygen-containing groups (see Table 1) and then restacked to a poorly ordered graphite-like material [26,27]. The (002) peak of NRGO-300 is weaker and boarder than that of RGO, which could be attributed to less re-graphitization of NRGO-300 because of the incorporation of nitrogen atoms into carbon skeletal of graphene.…”

In situ thermolysis of Pt-carbonyl complex to form supported clean Pt nanoclusters with enhanced catalytic performance

“…Liu and co-workers [19] prepared Pt NPs supported on multiwall carbon nanotubes (MWCNTs), which exhibited excellent activity for the solvent-free hydrogenation of NB to AN at a pressure of 2.0 MPa. Nie et al [20] used Pt/reduced graphene oxide (rGO) nanocomposites as the catalysts for the hydrogenation of nitroarenes, which showed higher catalytic activity than Pt/CNTs at 1.0 MPa. Nevertheless, these catalytic systems are not efficient enough and require harsh conditions.…”