KARPEN PILE

[profitis]

If you put any of the karpens under nitrogen then very negligible current will flow.you have to make sure of no dissolved oxygen if you try this.karpen himself put them under argon and showed grossly negligible current compared to oxygen OR hydrogen atmospheres.catalytic SPILLOVER (google) will only happen with actively chemisorbed (google)gases.

[pomodoro]

I'll devote some time from wed next week constructing one of these cells and test the voltage & current in O₂, Ar, and H₂ atmospheres. I'm still going to check gold as well, want to check its potential vs pt in deoxygenated dil sulfuric.

[profitis]

Exellent mr pomodoro.we can make history right here right now,the path is clear.we have only one thing to prove: that textbook catalyst spillover can be totaly spontaneously reversable.

[pomodoro]

Mr profitis , for the top electrode of your requested test with hydrogen, the expected E_H at 25C is 0-0.059log(pH₂^1/2/[H⁺]) which satd. with H2 would have p=1, but the distant electrode has p=0, any idea of the potential there before any hydrogen reaches it?

[profitis]

The Ag electrode will have a voltage less than the standard on platinized platinum 0.828V in 1M OH- ion solution mr pomodoro. Probably around 0.2V for the silver electrode directly due to hydrogen galvanic OVERPOTENTIAL on an Ag hydrogen electrode.