کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
189468 459680 2011 9 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Electrochemical studies of Zn underpotential/overpotential deposition on a nickel electrode from non-cyanide alkaline solution containing glycine
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی مهندسی شیمی (عمومی)
پیش نمایش صفحه اول مقاله
Electrochemical studies of Zn underpotential/overpotential deposition on a nickel electrode from non-cyanide alkaline solution containing glycine
چکیده انگلیسی

In this work we present an electrochemical study of the underpotential deposition (UPD) and overpotential deposition (OPD) of zinc onto nickel electrode (NE) from a non-cyanide alkaline solution containing glycine. The studied parameters were zinc concentration, glycine concentration and scanning rate. The analysis of the experimental data clearly showed the presence of UPD and OPD processes that started at −0.8 V vs. SCE and −1.4 V vs. SCE, respectively. The voltammetric studies also indicate diffusion control of the zinc UPD and OPD processes onto the NE. From the potentiostatic transients we found instantaneous nucleation (2D) mechanisms, which agree to that observed in the AFM study. In order to compare the effect of zinc/glycine concentration, we calculate thermodynamic parameters for the OPD process.


► Zinc electrodeposition from non-cyanide alkaline solution containing glycine was analyzed.
► We examine the underpotential (UPD) zinc process on nickel.
► 2D instantaneous nucleation and growth mechanism was found for zinc electrodeposition.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Electrochimica Acta - Volume 56, Issue 16, 30 June 2011, Pages 5443–5451
نویسندگان
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