Bifunctional effect of reduced graphene oxides to support active metal nanoparticles for oxygen reduction reaction and stability

Improved catalytic activity of cobalt core–platinum shell nanoparticles supported on surface functionalized graphene for methanol electro-oxidation

“…D.P. He and co-workers investigated Pt nanoparticles supported on nitrogen-doped reduced graphene oxide for use as proton exchange membrane fuel cell catalysts, his group also developed highly active and stable Pt/reduced graphene oxide electrocatalysts by tuning the O/C atom ratio of RGO supports [21,22]. Liu et al decorate Cu Pt composites on ionicliquid-assisted graphene and show that the electrocatalytic activity and stability of Cu Pt/ionic liquid-assisted graphene for methanol oxidation is better than that on commercial carbon blacks [23].…”

Simultaneous sulfonation and reduction of graphene oxide as highly efficient supports for metal nanocatalysts

“…The HRTEM images (Fig. 5b, d, e) show that the space of lattice fringes is 0.22 nm, which 14 is corresponding to (111) planes of crystalline Pt. Fig.…”

“…3 Most of the previous studies for the GNS-supported Pt catalysts employed graphene oxide (GO) as the catalyst support since there are abundant oxygen containing functional groups on GO, such as hydroxyl, epoxide, and carboxyl groups. The presence of such functional groups does make GO a good support for uniformly dispersing and depositing of Pt NPs with a small particle size, however, leads to a drastically decrease of the conductivity and stability as a result of the loss in the conjugated sp 2 network [14][15][16][17][18]. Therefore, GO is needed to be reduced further to reduced graphene oxide (rGO) which has a great increase in the conductivity and stability by restoring the hybridized sp2 network.…”

Improved oxygen reduction activity of porous carbon materials by self-doping nitrogen derived from PVP with urea as a promoter

“…However, the high cost and scarcity of Pt metals greatly hinder their wide-spread application in LTFCs. Moreover, Pt-based catalysts still suffer from serious challenges including degradation and aggregation of Pt nanoparicles [6,7], and intermediate tolerance to CO poisoning and methanol crossover in an electrochemical environment [6,8,9]. Thus, much effort has been focused on seeking valuable non-noble metal catalysts (NNMCs) to replace Pt-based catalysts.…”