Advances in electroanalysis, sensing and monitoring in molten salts

Damion K Corrigan, Justin P Elliott, Ewen O Blair, Simon J Reeves, Ilka Schmüser, Anthony J Walton, Andrew R Mount

Research output: Contribution to journalArticle

8 Citations (Scopus)

Abstract

Microelectrodes have a number of advantages over macroelectrodes for quantitative electroanalysis and monitoring, including reduced iR drop, a high signal-to-noise ratio and reduced sensitivity to convection. Their use in molten salts has been generally precluded by the combined materials challenges of stresses associated with thermal cycling and physical and corrosive chemical degradation at the relatively high temperatures involved. We have shown that microfabrication, employing high precision photolithographic patterning in combination with the controlled deposition of materials, can be used to successfully address these challenges. The resulting molten salt compatible microelectrodes (MSMs) enable prolonged quantitative microelectrode measurements in molten salts (MSs). This paper reports the fabrication of novel MSM disc electrodes, chosen because they have an established ambient analytical response. It includes a detailed set of electrochemical characterisation studies which demonstrate both their enhanced capability over macroelectrodes and over commercial glass pulled microelectrodes, and their ability to extract quantitative electroanalytical information from MS systems. MSM measurements are then used to demonstrate their potential for shedding new light on the fundamental properties of, and processes in, MSs, such as mass transport, charge transfer reaction rates and the selective plating/stripping and alloying reactions of liquid Bi and other metals; this will underpin the development of enhanced MS industrial processes, including pyrochemical spent nuclear fuel reprocessing.

LanguageEnglish
Pages351-366
Number of pages16
JournalFaraday Discussions
Volume190
Early online date11 Feb 2016
DOIs
Publication statusPublished - 2 Jun 2016

Fingerprint

molten salts
Molten materials
Microelectrodes
Salts
Monitoring
nuclear fuel reprocessing
Nuclear fuel reprocessing
Caustics
spent fuels
Microfabrication
Spent fuels
Thermal cycling
stripping
plating
Alloying
Plating
alloying
Reaction rates
Charge transfer
Signal to noise ratio

Keywords

  • electroanalysis
  • molten salts
  • microfibration
  • micorelectrodes

Cite this

Corrigan, D. K., Elliott, J. P., Blair, E. O., Reeves, S. J., Schmüser, I., Walton, A. J., & Mount, A. R. (2016). Advances in electroanalysis, sensing and monitoring in molten salts. Faraday Discussions, 190, 351-366. https://doi.org/10.1039/c6fd00002a
Corrigan, Damion K ; Elliott, Justin P ; Blair, Ewen O ; Reeves, Simon J ; Schmüser, Ilka ; Walton, Anthony J ; Mount, Andrew R. / Advances in electroanalysis, sensing and monitoring in molten salts. In: Faraday Discussions. 2016 ; Vol. 190. pp. 351-366.
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Corrigan, DK, Elliott, JP, Blair, EO, Reeves, SJ, Schmüser, I, Walton, AJ & Mount, AR 2016, 'Advances in electroanalysis, sensing and monitoring in molten salts' Faraday Discussions, vol. 190, pp. 351-366. https://doi.org/10.1039/c6fd00002a

Advances in electroanalysis, sensing and monitoring in molten salts. / Corrigan, Damion K; Elliott, Justin P; Blair, Ewen O; Reeves, Simon J; Schmüser, Ilka; Walton, Anthony J; Mount, Andrew R.

In: Faraday Discussions, Vol. 190, 02.06.2016, p. 351-366.

Research output: Contribution to journalArticle

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