Functionalization of Organic Redox Mediators to Mitigate Crossover in Chemically Regenerative Redox Fuel Cells

Chemically regenerative redox fuel cells are promising alternatives to conventional PEMFCs as stationary energy conversion devices since they avoid platinum-based catalyst at the cathode for the oxygen reduction reaction thanks to the chemical oxidation of the mediators in an external tank[1]. The requirements for the mediator are a high standard redox potential (0.6 V vs. SHE), high diffusion coefficient and fast electron transfer kinetic to reach high power density. Furthermore, the mediator must be stable in acidic medium (pH