ELECTRODEPOSITION OF LEAD DIOXIDE FROM ALKALINE SOLUTION

PbO//2 plated from Pb(NO//3)//2 solutions between pH 9 and 10 has the structure of !-PbO//2 but contains probably in solid solution, some Pb(OH)//2. One such deposit has the composition-PbO//1. //7//3(OH)//0. //2//7 or 19 PbO//2. 3 PB(OH)//2 and was obtained with current efficiency of 98% based on the real mean lead valence of 3. 74. Except for very low concentrations of lead and high concentrations of NaOH, the current efficiency from solutions with pH greater than 10 is close to 100% based on tetravalent lead.