I am going to be a DC power converter (with fairly high voltage and amps) to turn water into hydrogen (and oxygen) gases. However I have a few questions about the safety of this process.
What electrolyte should I use in the water? I was thinking of using Magnesium sulfate (epsom salt) or Sodium bicarbonate (baking soda).
What metal should I use for the electrodes? I am not sure if graphite is conductive enough to be efficient. I want to use stainless steel, but have heard this may produce hexavalent chromium. Is this true? What about iron or copper? Are these safe? Do they produce any other toxic byproducts? (I would use platinum or platinum-coated titanium, but these are expensive).
Is it safe to use these electrolytes and electrolytes together? Thanks!