Pt-Pd Bimetallic Nanocomposites Catalyst Formed on Graphene Surface: Preparation and high-performance for Methanol Electro-Oxidation

Reduced graphene oxide (RGO) supported Pt-Pd bimetallic nanocomposites with clean surface were prepared by direct electrodeposition method on glassy carbon electrode (GCE). The obtained Pt-Pd decorated RGO nanohybrids were characterized by field emission scanning electronic microscope (FE-SEM), X-ray photoelectron spectroscopy (XPS), and electrochemical method. The results have showed that the synergistic effect of alloying with Pd in the Pt-Pd nanoclusters structure leads to much higher performance for methanol oxidation reaction (MOR) than pristine Pt nanoparticles. Moreover, with the support of RGO, the Pt-Pd nanocomposites show much better durability and high efficiency in MOR. This work can help us deeply understand the electrocatalytic mechanism for MOR and will benefit the selection of new catalysts with high efficiency and low cost.

Automated summary

In this study, Pt-Pd bimetallic nanocomposites supported on reduced graphene oxide were prepared by direct electrodeposition, showing improved efficiency and durability for methanol oxidation reaction compared to pristine Pt nanoparticles. The synergistic effect of Pd alloying in the Pt-Pd nanoclusters structure was found to be the key factor contributing to the enhanced performance.