Abstract
It has been confirmed that and O2− are the cathode products and 
and O2 the anode products of electrolyzing 
at 550°C. In the presence of oxide, 
is oxidized at platinum to 
by a 6−electron process involving the substrate metal. Ag+/Ag is a satisfactory reference electrode for the concentration range 
. Formal potentials of other systems on a molal scale are: 
, 
, 
, 
, 
. Several other metals corrode or are noble. Ag is corroded by 
mixtures to a saturation concentration of 
. On cooling solutions of Ag+ in 
, a black precipitate of metal is obtained. The bearing of these observations on the corrosion of carbonate fuel cell cathodes is discussed.