Abstract

In this work, the use of atomic emission spectroelectrochemistry (AESEC) coupled to electrochemical impedance spectroscopy (EIS) is presented as a method of revealing dissolution mechanisms. To illustrate the method, the dissolution kinetics of Al cations from an Al-Zn pure phase (Zn-68 wt.% Al) was investigated in an alkaline solution. In the cathodic potential domain, a nearly direct formation of dissolved Al3+ was observed, while in the anodic potential domain the Al dissolution occurred by migration across a ZnO/Zn(OH)2 film. It was demonstrated that this methodology can be applied to a nonstationary system during a potentiostatic experiment for a lower Al content phase (Zn-22 wt.% Al). The nature of the charge transfer mechanisms depended on the applied potential and could be identified by comparing the direct current and alternating current faradaic yield using AESEC-EIS.

Details

Title
Refining anodic and cathodic dissolution mechanisms: combined AESEC-EIS applied to Al-Zn pure phase in alkaline solution
Author
Han Junsoo 1   VIAFID ORCID Logo  ; Vivier, Vincent 2   VIAFID ORCID Logo  ; Ogle, Kevin 3 

1  Chimie ParisTech, PSL Research University, CNRS, Institut de Recherche Chimie Paris (IRCP), Paris, France (GRID:grid.4444.0) (ISNI:0000 0001 2112 9282); Department of Materials Science and Engineering, University of Virginia, Charlottesville, United States (GRID:grid.27755.32) (ISNI:0000 0000 9136 933X) 
2  Sorbonne Université, CNRS, Laboratoire Interfaces et Systèmes Electrochimiques, LISE, Paris, France (GRID:grid.4444.0) (ISNI:0000 0001 2112 9282) 
3  Chimie ParisTech, PSL Research University, CNRS, Institut de Recherche Chimie Paris (IRCP), Paris, France (GRID:grid.4444.0) (ISNI:0000 0001 2112 9282) 
Publication year
2020
Publication date
2020
Publisher
Nature Publishing Group
e-ISSN
23972106
Source type
Scholarly Journal
Language of publication
English
DOI
https://doi.org/10.1038/s41529-020-0123-0
ProQuest document ID
2488772919
Copyright
© The Author(s) 2020. This work is published under http://creativecommons.org/licenses/by/4.0/ (the “License”). Notwithstanding the ProQuest Terms and Conditions, you may use this content in accordance with the terms of the License.