
%0 Journal Article
%A Koch, DFA 
%T The effect of Cobalt on the Kinetics of Oxygen evolution at a Lead Dioxide anode in Sulphuric Acid
%J Australian Journal of Chemistry
%D 1959/06/01
%V 12
%N 2
%P 127-137
%K 
%R https://doi.org/10.1071/CH9590127
%U https://www.publish.csiro.au/paper/CH9590127 
%X The overpotential (n)-log current density (log i) curves for the evolution of oxygen at a lead dioxide anode in 2N H2SO4 both in the absence and presence of cobaltous sulphate in solution have been used to determine the electrode kinetic constants &#945; ; i0 for a series of temperatures and also &#916;H0*:. At 25 °C in the absence of cobalt &#945;=O.59, i0= 10-11, and &#916;H0*= 15 kcal mole-1 When 13 mg/l cobaltous sulphate is added &#945;= 1.0, i0= 10-15, and &#916;H0*:=29 kcal mole-1.   Possible mechanisms for the reaction are discussed on the basis of these values and the rate determining steps suggested (where M represents the PbO2 surface) are M +H2O =MOH +H+ +e in the absence of cobalt and 2CoOH++ = 2Co++ +H2O + O in its presence. 
