The Synthesis of High Dispersed Ni/Pt/C Nano Electrocatalysts for Oxygen Reduction Reaction

Abstract

Highdispersed core–shell Ni/Pt/C nanoelectrocatalysts were prepared by “modified polyol processâ€‌ method. Effect of the experimental parameters, such as the pretreatment of XC72 supports, the method of adding the XC72 supports, the concentration of the precursors, on the characteristic and the dispersion of the Ni/Pt nanoparticles on carbon were studied in details. The prepared core–shell Ni/Pt/C catalysts were characterized with Xray diffraction (XRD), transmission electron microscopy (TEM), and electrochemical methods. The results exhibit that the choice of method of adding the XC72 support into the solution before formation of the Ni core and appropriately lower concentration of the precursor can obtain high dispersed Ni/Pt/C catalysts, which showed remarkably enhanced activity for oxygen reduction reaction (ORR).