▎ 摘 要
Reduced graphene oxide (rGO) and nitrogen doped graphene (NG) have been used as a support for decorating the platinum (Pt) and yttrium (Y) alloy (Pt3Y) nanoparticles. Pt3Y nanoparticles decorated graphene (Pt3Y/G) and Pt3Y nanoparticles decorated nitrogen doped graphene (Pt3Y/NG) have been applied as oxygen reduction reaction (ORR) electrocatalysts in proton exchange membrane fuel cells. The electrochemically active surface area has been measured by Cyclic Voltammetry (CV). The ORR activity has been investigated by polarization studies using fuel cell fixture. The enhanced catalytic activity of Pt3Y/NG towards ORR is due to homogeneous dispersion and optimum particle size of Pt3Y alloy nanoparticles over the surface of NG. This study revealed that, Pt3Y/NG is more ORR active than Pt3Y/G.