Study of electrocrystallization of Ni and Ni-P on platinum ultramicroelectrode

Química Nova

Universidade Norte do Paraná, Londrina, Brasil¹  Universidade de São Paulo, São Carlos, Brasil¹  Avaca, Luis Alberto¹  Eguiluz, Katlin Ivon Barrios¹  Barin, Cláudia Smaniotto¹ 

关键词: electrocrystallization;    nickel-;    phosphorous;    Pt ultramicroelectrode.;   

DOI  :  10.1590/S0100-40422008000500042

学科分类：化学（综合）

来源: Sociedade Brasileira de Quimica

【 摘 要 】

This work describes a comparative study of the electrocrystallization of Ni and Ni-P on Pt ultramicroelectrodes using chronoamperometric measurements. It was possible to confirm that in all cases a progressive nucleation was the predominant mechanism. Moreover, the application of the Atomistic Theory to the experimental rate of nuclei formation showed that the number of atoms in the critical nucleus was zero, except for Ni-P on Pt at low overpotentials were a value of one was observed. Furthermore, the physical characterisation of the different deposits on Pt by atomic force microscopy allowed observing the coalescence of the hemispherical nuclei of Ni and Ni-P at tmax thus confirming the results obtained from the current-time analysis.

【 授权许可】

Unknown