Cathodic stripping of elemental Te in dichloromethane
Cathodic stripping of elemental Te in dichloromethane
The cathodic stripping of Te in CH2Cl2 with 0.1 M [NnBu4]Cl has been studied. In background electrolyte the cathodic stripping of Te behaves in the expected way. In contrast, when the stripping occurs in the [NnBu4]2[TeCl6] plating solution, unusual voltammetry is observed. Microelectrode and EQCM studies show that cathodic stripping of Te in the plating solution occurs with the passage of very little charge and leads to the formation of Te(0) in solution due to a rapid reaction between the reduced Te(-II) species and the Te(IV) salt. As a result, the limiting current for reduction of the Te(IV) is unchanged with 4 electron reduction leading to the formation of Te(0) on the electrode at potentials positive of the Te cathodic stripping potential and Te(0) in solution at potentials negative of the Te cathodic stripping potential. The same behaviour is found when a Te(II) precursor is used in place of the Te(IV) salt.
Chlorometallate, Non-aqueous, Stripping, Te(-II), Tellurium
Cook, D.A.
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Reeves, S.J.
121fe250-d3b8-4fd7-830b-deaa06385b9c
Zhang, W.
1f80ac5e-d4c2-4720-b19e-be700cd411e7
Reid, G.
37d35b11-40ce-48c5-a68e-f6ce04cd4037
Levason, W.
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Bartlett, P.N.
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10 October 2023
Cook, D.A.
0fca0ffb-eef4-422f-b513-ce9a1f7de7cc
Reeves, S.J.
121fe250-d3b8-4fd7-830b-deaa06385b9c
Zhang, W.
1f80ac5e-d4c2-4720-b19e-be700cd411e7
Reid, G.
37d35b11-40ce-48c5-a68e-f6ce04cd4037
Levason, W.
e7f6d7c7-643c-49f5-8b57-0ebbe1bb52cd
Bartlett, P.N.
d99446db-a59d-4f89-96eb-f64b5d8bb075
Cook, D.A., Reeves, S.J., Zhang, W., Reid, G., Levason, W. and Bartlett, P.N.
(2023)
Cathodic stripping of elemental Te in dichloromethane.
Electrochimica Acta, 465, [142997].
(doi:10.1016/j.electacta.2023.142997).
Abstract
The cathodic stripping of Te in CH2Cl2 with 0.1 M [NnBu4]Cl has been studied. In background electrolyte the cathodic stripping of Te behaves in the expected way. In contrast, when the stripping occurs in the [NnBu4]2[TeCl6] plating solution, unusual voltammetry is observed. Microelectrode and EQCM studies show that cathodic stripping of Te in the plating solution occurs with the passage of very little charge and leads to the formation of Te(0) in solution due to a rapid reaction between the reduced Te(-II) species and the Te(IV) salt. As a result, the limiting current for reduction of the Te(IV) is unchanged with 4 electron reduction leading to the formation of Te(0) on the electrode at potentials positive of the Te cathodic stripping potential and Te(0) in solution at potentials negative of the Te cathodic stripping potential. The same behaviour is found when a Te(II) precursor is used in place of the Te(IV) salt.
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Accepted/In Press date: 7 August 2023
e-pub ahead of print date: 8 August 2023
Published date: 10 October 2023
Additional Information:
Funding Information:
This work was supported by the EPSRC through the Advanced Devices by ElectroPlaTing program grant (ADEPT; EP/N035437/1).
Publisher Copyright:
© 2023 The Author(s)
Keywords:
Chlorometallate, Non-aqueous, Stripping, Te(-II), Tellurium
Identifiers
Local EPrints ID: 481283
URI: http://eprints.soton.ac.uk/id/eprint/481283
ISSN: 0013-4686
PURE UUID: aeb7389a-f170-4157-8c7f-e8bede4eb504
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Date deposited: 22 Aug 2023 16:38
Last modified: 18 Mar 2024 03:47
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Author:
D.A. Cook
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