About diamons,d I've followed an interesting application of boron doped diamonst for purifying water through electrolysisi.
Diamonds resist better high current.
http://www.waterworld.com/arti…er-without-chemicals.html
http://www.scielo.br/scielo.ph…d=S1516-14392007000400016
about slow electrons because of low workfunction (not sure I understand what it mean ? low exit potential barrier?), may I make a parallel with glow discharge experiments ? is is meaningful?