Terry Blanton wrote. > > > > > > I appreciate all the great advice. I am not sure exactly what it is > > that I am trying to do. :-) > > Don't discount the omnipresent aqueous CO2/H2CO3 either.
The H+ and HCO3- or CO3= ions aren't ignoring the plate potentials. that can be less than 0.4 volts to effect reduction of CO2. 5,928,806 Gas Research Institute "A solution of carbon dioxide in an aqueous solvent having electrolyte dissolved therein is electrolyzed utilizing a molybdenum cathode. Faradaic efficiency is generally quite high and without detectable corrosion." "In accordance with the present invention the above reaction is carried out utilizing a molybdenum cathode. A molybdenum cathode can reduce carbon dioxide to methanol selectively and with up to 80 to 100% faradaic efficiency. Such reductions can occur, for example, at -0.7 V vs. SCE at pH 4.2, only 160 mV negative of the standard potential corrected for pH." http://patft.uspto.gov/netahtml/PTO/srchnum.htm > > > > BTW, I did clean the plates with methylbenzene before assembly. But, > > as you know, SS still looks oily when clean. > > > > Much more scum appearing on the surface. Still lots of anode bubbles. > > 1.1 mA this morning. > > > > Terry > > > >
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