Dual dynamic voltammetric study of the formation of ferrate ions during the electrochemical dissolution of white cast iron in the transpassive region
-
Ábel Zsubrits
,
Miklós Kuti
,
Éva Fekete
and
Győző G. Láng
Abstract
Electrochemical synthesis is an effective method for ferrate ion (FeO42−) production. Ferrate ion production and oxygen evolution happen simultaneously during the transpassive anodic dissolution of iron and many iron-containing electrodes; the voltametric curves obtained during the experiments show only the total current produced by these two processes. Products from the aforementioned processes were examined in 45 % (m/m) aqueous NaOH solutions using the combination of dual dynamic voltammetry (DDV) with the rotating ring-disk electrode (RRDE) method (i.e., applying dynamic potential programs to the disk and the ring electrodes of the RRDE tip simultaneously). White cast iron (WCI) disk/Pt ring RRDE tips were used in the experiments. The electrode potential regions where ferrate ions and oxygen are formed could be efficiently identified by employing the DDV technique in conjunction with spectrophotometric data. The most suitable potential range for the electrochemical generation of ferrate ions in terms of current efficiency could also be determined. The results were compared to previous investigations using high-purity iron electrodes. The approach presented in this study indicated great potential for the concurrent detection of various dissolution products and offers opportunities for the initial assessment of the most favorable parameters in large-scale industrial operations through the utilization of small-scale systems.
Acknowledgements
This work was performed in the frame of the 2018–1.1.2-KFI-2018-00123 project, implemented with the support provided by the National Research, Development and Innovation Fund of Hungary, financed under the 2018–1.1.2-KFI funding scheme. G.G. Láng and É. Fekete thank for grants from the National Research, Development, and Innovation Office (NKFIH, Hungary), grant nos. K 129210, FK135375. The publication was created as part of the Momentum Programme of the Hungarian Academy of Sciences (grant LP2022–18/2022). The dual voltammetric measurement apparatus was provided by Dr. Soma Vesztergom, for which the authors are grateful.
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Research ethics: Not applicable.
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Informed consent: Not applicable.
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Author contributions: All authors have accepted responsibility for the entire content of this manuscript and approved its submission.
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Use of Large Language Models, AI and Machine Learning Tools: None declared.
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Conflict of interest: The authors state no conflict of interest.
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Research funding: National Research, Development and Innovation Fund of Hungary, financed under the 2018-1.1.2-KFI funding scheme (2018-1.1.2-KFI-2018-00123 project). National Research, Development, and Innovation Office (NKFIH, Hungary), grant nos. K 129210, FK135375. Momentum Programme of the Hungarian Academy of Sciences (grant LP2022–18/2022).
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Data availability: The data that support the findings of this study are available from the corresponding author, G.G.L., upon reasonable request.
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Comment: This manuscript is based on the poster and short lecture entitled “On the electrochemical production of ferrate ions – in situ detection of the product using dual dynamic voltammetry” presented during the “6th Erwin Schrödinger Symposium 2023: From Nanostructure to Function 4th European Conference on Physical Chemistry–ECPC23” October 9-11, 2023, Vorarlberg University of Applied Sciences, Dornbirn, Vorarlberg, Austria, Book of Abstract p.31, Abstract number P18.
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- Frontmatter
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- Contribution to “From Nanostructure to Function”
- Temporal airy pulses efficiency in thin glass dicing
- Surface investigations of bronze and brass statuary monuments in open-air exposure
- Dual dynamic voltammetric study of the formation of ferrate ions during the electrochemical dissolution of white cast iron in the transpassive region
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Articles in the same Issue
- Frontmatter
- Preface
- Preface
- Contribution to “From Nanostructure to Function”
- Temporal airy pulses efficiency in thin glass dicing
- Surface investigations of bronze and brass statuary monuments in open-air exposure
- Dual dynamic voltammetric study of the formation of ferrate ions during the electrochemical dissolution of white cast iron in the transpassive region
- Cetuximab-induced changes to tumor oral mucosa models probed by stimulated Raman spectromicroscopy
- From nanostructure to function: hierarchical functional structures in chitin and keratin
- The influence of glycine on β-lactoglobulin amyloid fibril formation – computer simulation study
