FUEL CELL SYSTEM, VEHICLE AND DECONTAMINATION METHOD THEREOF

The invention relates to a fuel cell system (1) comprising: - a fuel cell (10) which comprises an anode compartment and a cathode compartment, and - a supply system (2) supplying the anode compartment of the fuel cell with dihydrogen (H2) and comprising a first tank (21) adapted to store ammonia (NH3), a reforming stage (24) adapted to reform the ammonia from the first tank into dihydrogen and to produce dinitrogen (N2), and a purification stage (25) adapted to filter the dinitrogen produced in the reforming stage. According to the invention, the purification stage communicates with a second tank (41) adapted to store the dinitrogen filtered by said purification stage, the second tank communicates with the cathode compartment of the fuel cell, and there are provided means for regulating the flow rate (42, 43) of dinitrogen circulating from the second tank to the cathode compartment of the fuel cell.