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Hydrogen Fuel Cell Porous anode and cathode? Answered

I found this image that details a hydrogen fuel cell (reverse electrolysis). Does anyone know what materials are good for the porous anode and cathode? Is carbon porous on a molecular scale? I want to make a simple reverse electrolysis in order to use hydrogen power. I would appreciate any help.

I got the image from here: http://www.greenoptimistic.com/simple-fuel-cell-build/#.VaLmC65Vikp


There is a reason fuel cells are not powering every home. It's not for lack of energy they can produce but the cost involved is the materials that make them. Materials like platinum. The amount needed for one of these small 1.23V cells is more than what is used in most catalytic converters on cars. We're talking several hundred dollars of more just for the anode. When it indicates a porous anode and cathode it's talking about producing the material into a sponge like material. Small enough to allow air to pass but not a liquid. Further increasing the cost of materials here. It's not something you'll be able to easily find or make at home. To make the platinum anode you'd start with a porous sub strait and plate it with a layer of platinum microns thick. Overall it doesn't use a lot of platinum but it still uses several hundred dollars forth of the stuff.

A fone stainless steel mesh woul be porous for example.
Titanium sponges as well but a bit costly.

Is graphene suitable?