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Thermo–Kinetic diagrams : the Cu–H₂O–Acetate and the Cu-H₂O systems Deen, K. M.; Mehrjoo, Nasrin; Asselin, Edouard
Abstract
The thermo-kinetic (TK) diagram for the Cu–H₂O system with and without acetate ions is developed and presented. The TK diagram, which is an Eₕ-pH-i contour map, can be used to evaluate the kinetics of the electrochemical processes occurring at the electrode/solution interface in the Eₕ–pH domain. Such a diagram can be used for corrosion engineering or for improved leaching performance in metal extraction and recycling processes. The TK-diagrams are developed based on experimental data collected under controlled conditions (298 ± 01 K, rotation at 500 rpm) and they do not require thermodynamic data or thermodynamic calculations. The electrochemical response of a pure Cu–Rotating Disk Electrode (Cu–RDE) was determined by linear sweep voltammetry scans and plotted as Eₕ vs. log i. The TK–diagram quantifies the rate of the faradaic process taking place on the Cu-RDE as a function of applied potential and solution pH. Based on the magnitude of current density, different regions in TK-diagrams can be differentiated similarly to those in the classic Eₕ-pH diagrams. TK-diagrams can be developed for other metals and minerals in aqueous media containing various ligands. The merits and disadvantages of using these diagrams are also discussed.
Item Metadata
Title |
Thermo–Kinetic diagrams : the Cu–H₂O–Acetate and the Cu-H₂O systems
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Creator | |
Publisher |
Elsevier
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Date Issued |
2021-08-15
|
Description |
The thermo-kinetic (TK) diagram for the Cu–H₂O system with and without acetate ions is
developed and presented. The TK diagram, which is an Eₕ-pH-i contour map, can be used to
evaluate the kinetics of the electrochemical processes occurring at the electrode/solution interface
in the Eₕ–pH domain. Such a diagram can be used for corrosion engineering or for improved
leaching performance in metal extraction and recycling processes. The TK-diagrams are developed
based on experimental data collected under controlled conditions (298 ± 01 K, rotation at 500 rpm)
and they do not require thermodynamic data or thermodynamic calculations. The electrochemical
response of a pure Cu–Rotating Disk Electrode (Cu–RDE) was determined by linear sweep
voltammetry scans and plotted as Eₕ vs. log i. The TK–diagram quantifies the rate of the faradaic
process taking place on the Cu-RDE as a function of applied potential and solution pH. Based on
the magnitude of current density, different regions in TK-diagrams can be differentiated similarly
to those in the classic Eₕ-pH diagrams. TK-diagrams can be developed for other metals and
minerals in aqueous media containing various ligands. The merits and disadvantages of using these
diagrams are also discussed.
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Subject | |
Genre | |
Type | |
Language |
eng
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Date Available |
2023-08-15
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Provider |
Vancouver : University of British Columbia Library
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Rights |
Attribution-NonCommercial-NoDerivatives 4.0 International
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DOI |
10.14288/1.0402344
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URI | |
Affiliation | |
Citation |
Deen, K. et al. Thermo-Kinetic diagrams: The Cu-H₂O-Acetate and the Cu-H₂O systems. Journal of Electroanalytical Chemistry. Vol. 895, August 2021.
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Publisher DOI |
10.1016/j.jelechem.2021.115467
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Peer Review Status |
Reviewed
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Scholarly Level |
Faculty; Researcher; Postdoctoral
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Rights URI | |
Aggregated Source Repository |
DSpace
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Item Citations and Data
Rights
Attribution-NonCommercial-NoDerivatives 4.0 International