I've seen lots of videos, animations, and a few Wikipedia pages, but I'm still trying to figure out a few things.
Is an electrolyte needed to make the water conductive like an alkaline electrolyser?
Does the cathode remain dry? If so, how do the protons get across the gap from the membrane to the cathode?
Are platinum cathode and iridium anode catalysts required for the reaction, or just needed to speed it up a small amount? Why are these specific materials used?