The influence of methanesulfonate ions on physico-chemical properties of lead dioxide

 

Chem. Met. Alloys 14 (2021) 7-12

https://doi.org/10.30970/cma14.0413

 

Alexander VELICHENKO, Tatiana LUKYANENKO, Olesia SHMYCHKOVA, Pavlo DEMCHENKO, Roman GLADYSHEVSKII

 

The results of an investigation of the influence of methanesulfonate ions on physico-chemical properties of electrochemically deposited lead dioxide are reported. It was possible to synthesize high-quality films of up to 2 mm thickness, free from internal stress, with reliable adhesion to the substrate in the current density range 2-180 mA∙cm-2. Changes in the composition of the methanesulfonate electrolyte or the deposition conditions affected the relative contents of the α- and β-modifications of the dioxide. The main difference, compared with lead oxides obtained from nitrate solutions, was the significant amount of α-phase, which varied from 17 to 90%. The deposits were well crystallized and contained smaller crystals.

 

Fig

 

Current efficiency of PbO2 vs. current density in different electrolytes: 1 0.5 M Pb(CH3SO3)2 + 0.1 M CH3SO3H; 2 1.0 M Pb(CH3SO3)2 + 0.1 M CH3SO3H; 3 1.0 M Pb(CH3SO3)2 + 0.1 M CH3SO3H with stirring.

 

Keywords

Lead(IV) oxide / Methanesulfonate ion / Phase composition / Current efficiency