Electrode performance depends largely on the microstructure,hence the Ordered Nanoarrays Electrode (ONAE) has been attracted more and more attentions.The presentation aims to assess the benefit and disadvantage of the Pt Order Nanoarrays electrode (Pt-ONAE) in terms of oxygen reduction reaction (ORR).Therefore the ORR kinetic equation was formulated for both Pt-ONAE and traditional Pt/C electrode.Several structure parameters of the electrode such as thickness/porosities,surface area,and tortuosity factor are critical to the ORR kinetic.