Oxygen reduction reaction (ORR) is of significance for energy conversion technologies such as fuel cells and metal-air batteries [1,2].Currently, the electrocatalysts still need to employ expensive precious metal platinum (Pt) as the main active component to overcome the sluggish kinetics of ORR [3,4].The exploration of low-cost, highly active and highly stable ORR catalysts is then the key to the development and promotion of these new energy technologies [5].In the last decades, great breakthroughs have been made in the activity of noble metal-based catalysts, while the investigations on the stability, especially their service and failure of membrane electrode assemble (MEA) are still limited [6,7].However, measuring and evaluating the performance of nanostructured catalysts on the MEA level is the key to the catalyst's practical applications.