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light arrowI have made the experiments only with Fe(inox) electrodes. I have read in my chemistry books that molten NaCl is electrolysed with metallic electrodes. I haven't found any detailed specification. I will search for details and I will repeat with graphite electrodes.
Here's a nice thought experiment for you. If you heat salt to a high enough temperature it boils. If you keep heating the vapour it dissociates. So, if it's hot enough it forms Na and Cl without any electric potential.How big as shock is it that hot salt needs less voltage to decompose it than cold salt?