Your English is fine :-)
Unfortunately, plating your electrodes won't work. Your reactor is really based on the same principles as an electroplate tank. So, it would just remove the plating from one electrolde, placing in on the other.
The topic subject suggest you were considering using chrome. That is a big no-no. You want as little chrome in the electrologists process as possible, because it reacts with a electrolyte producing cr(6) which is a cancer causing substance. It is for that reason we use 316L stainless steel, rather than less expensive grades -- 316L has the lowest chrome content.
Good luck with your project!
1991 Plymouth Acclaim 3L V6.
1 dry cells with nineteen 6"x8" 316L ss plates, driven by constant current PWM set at 35 amps (13.3V at PWM). 28% KOH electrolyte. Total measured output 2.5 lpm. Mileage went from 18 to 26 mpg, all city driving (44% increase). EFIE set at .370 and I still need to play with ignition timing.