The nucleation and growth of a lead phosphate film on homogeneous lead amalgam
作者： James A. Cox , Marcin Majda
DOI: 10.1016/0013-4686(80)87159-3
关键词: Crystallization 、 Electrochemistry 、 Overpotential 、 Cottrell equation 、 Inorganic chemistry 、 Amalgam (chemistry) 、 Chemistry 、 Phosphate 、 Nucleation 、 Lead phosphate
摘要: The electrochemical oxidation of Pb(Hg) in acidic phosphate medium results formation a monomolecular PbHPO4 passivating film. Analysis potentiostatic current-time transients demonstrated that the crystallization occurred through 2-dimensional progressive nucleation and growth mechanism. potential dependence combined rate constants was [7.8 ± 0.7 mV/decade]−1. soluble lead species prior to film observed under certain conditions. Examination it curves this region by low overpotential form Cottrell equation indicated PbHPO4.
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