opening 73 for evacuating the draining gas various contact grids 9 10 11 are arranged in contact respectively with the anode 4 1 and the cathode 2 1 more specifically the grid 11 in contact with the cathode 2 1 is made of nickel having a thickness equal to 0 45 mm with 100 mesh cells cm 2 and a unit wire diameter of 0 22 mm the contact grids 9 10 are for their part made of gold and platinum as illustrated in fig4 the grids 9 10 11 allow an electrical supply of current i and or voltage u to the cell c 1 in order for it to carry out a reaction for hte electrolysis or co electrolysis of steam h 2 o and of co 2 either a syngas h 2 co or a mixture h 2 co 2 is injected at the inlet 70 of cathode 2 1 and air is simultaneously injected at the inlet 72 of anode 4 1 without polarizing the cell the gas analysis was carried out after condensation of the gases in order to remove h 2 o by micro gas chromatography by means of the apparatus sold by the company sra under the name u201c microgc 3000 u201d two series of measurements were carried out with two different types of.