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Electroreduction of pertechnetate ions in concentrated acetate solutions

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dc.contributor.authorVolkov, M. A.
dc.contributor.authorGerman, K. E.
dc.contributor.authorFilatova, E. A.
dc.contributor.authorBelyakova, O. A.
dc.contributor.authorKuznetsov, V. V.
dc.contributor.authorКузнецов, Виталий Владимирович
dc.date.accessioned2024-11-26T13:47:16Z
dc.date.available2024-11-26T13:47:16Z
dc.date.issued2020
dc.description.abstract© 2020 Elsevier B.V.Electrochemical reduction of pertechnetate ions is studied in acetate solutions on both mercury dropping and solid electrodes. It is found that electroreduction of TcO4 − ions on the mercury dropping electrode occurs stepwise via the following route Tc(VII) → Tc(IV) → Tc(III) → Tc(0). Ammonium ions affect the reduction of pertechnetate ions by shifting potentials of polarographic waves in a positive direction. Diffusion coefficients of Tc(VII) species in acetate solutions decreased from ~1 · 10−5 cm2 s−1 in a solution containing 2 mol dm−3 acetate ions to ~1.2 · 10−6 cm2 s−1 in a solution containing 8 mol dm−3 acetate ions. The Stokes radius of pertechnetate ion is 0.19 ± 0.01 nm. Technetium coatings were characterized using X-ray absorption spectroscopy (XANES/EXAFS). It is shown that technetium is in the metallic state in the electrolytic deposits; however, the obtained metal is amorphous. The Tc-Tc interatomic distances and coordination numbers of Tc atoms in the deposits are determined. The distance between technetium atoms in the electrodeposits is slightly less (0.262 nm) compared to technetium foil (0.272 nm).
dc.identifier.citationElectroreduction of pertechnetate ions in concentrated acetate solutions / Volkov, M.A. [et al.] // Journal of Electroanalytical Chemistry. - 2020. - 869. - 10.1016/j.jelechem.2020.114090
dc.identifier.doi10.1016/j.jelechem.2020.114090
dc.identifier.urihttps://www.doi.org/10.1016/j.jelechem.2020.114090
dc.identifier.urihttps://www.scopus.com/record/display.uri?eid=2-s2.0-85085270217&origin=resultslist
dc.identifier.urihttp://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcAuth=Alerting&SrcApp=Alerting&DestApp=WOS_CPL&DestLinkType=FullRecord&UT=WOS:000541932100003
dc.identifier.urihttps://openrepository.mephi.ru/handle/123456789/21842
dc.relation.ispartofJournal of Electroanalytical Chemistry
dc.titleElectroreduction of pertechnetate ions in concentrated acetate solutions
dc.typeArticle
dspace.entity.typePublication
oaire.citation.volume869
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relation.isAuthorOfPublication.latestForDiscoverya17dd589-87e3-4abd-95f3-abe99e584c52
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