The present invention relates i. The method further includes ramping a valve control voltage for a flow control valve of the MFC to the desired valve control voltage with the tunable activation circuit, and returning control of the MFC to an MFC valve controller circuit. There is at least one recess arranged on the surface and the at least one recess also partially includes the outside of the fuel distributor. The invention also relates to the use of the electrolytic cell for production of e.