The influence of early stages
of PbO2 nucleation on its phase composition
Chem.
Met. Alloys 9 (2016)
99-104
https://doi.org/10.30970/cma9.0336
Olesia
SHMYCHKOVA, Tatiana LUK’YANENKO, Alexander
VELICHENKO
During the electrodeposition of lead(IV) oxide
the simultaneous formation of two phases (α- and β-phase) may occur.
Film electrodeposition begins with the formation of
α-phase, and then the formation of β-phase or simultaneous two-phase
deposition takes place. The nucleation of PbO2 occurs through a
progressive mechanism both in methanesulfonate and
nitrate electrolytes. However, the preferred form of crystals in the case of methanesulfonate electrolyte is the cylinder, and in the
nitrate electrolyte the crystal formation occurs in the form of cones. The
character and kinetic parameters of 2D nucleation of lead(IV)
oxide crystals allow predicting the phase composition of the coatings.
Current-time dependency for PbO2
deposition onto a Pt
disk electrode from 0.01 M Pb(CH3SO3)2 + 1 M CH3SO3H at different
deposition potentials.
Keywords
Lead(IV) oxide
/ Nucleation and growth /