Abstract: A fuel cell catalyst support material with self-healing and service on the fly properties. The material is stable and can preserve a fuel cell's activity over an extended lifetime. The approach strikes a practical balance between the optimum size of the electrocatalyst particle and the ability of the support material to self-heal under electrochemical stress. The self-healing support material allows the use of very small catalyst particles size without affecting the fuel cell's durability. This not only increases the efficiency of the fuel cell but also allows low PGM loading.