How do you separate hydrogen from oxygen after electrolysis of water?
Similarly, how do you separate hydrogen and oxygen from water?
Splitting the hydrogen and oxygen inwater is accomplished using a process called“water electrolysis" in which both the hydrogenand oxygen molecules separate into individual gassesvia separate “evolution reactions." Each evolutionreaction is induced by an electrode in the presence of acatalyst.
Herein, how much energy does it take to separate hydrogen and oxygen from h2o?
Re: How much energy is required to split awater molecule into oxygen and hydrogen? Yes,it takes at least as much energy to splitwater into O2 and H2 as is released whenthese gases combine to form water. This is about 260 kJ permole of water or just shy of 5 eV per molecule ofwater (4 electrons times 1.23 V).
There is such a thing as "artificial gills" thatmechanically extract oxygen from water for a human tobreathe. See also Breathing in oceans full of air. As mentioned inthe first article, it would be possible to separate waterinto oxygen and hydrogen with electrolysis.