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dc.creatorGajić-Krstajić, Ljiljana M
dc.creatorElezović, Nevenka R.
dc.creatorJović, Borka M
dc.creatorMartelli, Gian N.
dc.creatorJović, Vladimir D
dc.creatorKrstajić, Nedeljko V
dc.date.accessioned2022-04-05T15:04:31Z
dc.date.available2022-04-05T15:04:31Z
dc.date.issued2016
dc.identifier.issn0367-598X
dc.identifier.urihttp://rimsi.imsi.bg.ac.rs/handle/123456789/992
dc.description.abstractThe aim of this study was to gain a better understanding of the feasibility of partial replacement of dichromate, Cr(VI), with phosphate buffer, focusing on the cathode reaction selectivity for hydrogen evolution on mild steel and Fe-Mo cathodes in undivided cell for chlorate production. To evaluate the ability of phosphate and Cr(VI) additions to hinder hypochlorite and chlorate reduction, overall current efficiency (CE) measurements in laboratory cell for chlorate production on stationary electrodes were performed. The concentration of hypochlorite was determined by a conventional potentiometric titration method using 0.01 mol dm(-3) As2O3 solution as a titrant. The chlorate concentration was determined by excess of 1.0 mol dm(-3) As2O3 solution and excess of arsenic oxide was titrated with 0.1 mol dm(-3) KBrO3 solution in a strong acidic solution. Cathodic hypochlorite and chlorate reduction were suppressed efficiently by addition of 3 g dm(-3) dichromate at both cathodes, except that Fe-Mo cathode exhibited higher catalytic activity for hydrogen evolution reaction (HER). The overvoltage for the HER was around 0.17 V lower on Fe-Mo cathode than on mild steel at the current density of 3 kA m(-2). It was found that a dichromate content as low as 0.1 g dm(-3) is sufficient for complete suppression of cathodic hypochlorite and chlorate reduction onto Fe-Mo catalyst in phosphate buffering system (3 g dm(-3) Na2HPO4 + NaH2PO4). The overall current efficiency was practically the same as in the case of the presence of 3 g dm(-3) dichromate buffer (98%). However, for the mild steel cathode, the overall current efficiency for the chlorate production was somewhat lower in the above mentioned mixed phosphate + dichromate buffering system (95%) than in the pure dichromate buffering solution (97.5%).en
dc.publisherSavez hemijskih inženjera, Beograd
dc.rightsopenAccess
dc.rights.urihttps://creativecommons.org/licenses/by-nc-nd/4.0/
dc.sourceHemijska Industrija
dc.subjectphosphate bufferen
dc.subjectFe-Mo cathode catalysten
dc.subjectcurrent efficiencyen
dc.subjectchlorate productionen
dc.titleFe-Mo alloy coatings as cathodes in chlorate production processen
dc.typearticle
dc.rights.licenseBY-NC-ND
dc.citation.epage89
dc.citation.issue1
dc.citation.other70(1): 81-89
dc.citation.rankM23
dc.citation.spage81
dc.citation.volume70
dc.identifier.doi10.2298/HEMIND150119014G
dc.identifier.fulltexthttp://rimsi.imsi.bg.ac.rs/bitstream/id/1127/989.pdf
dc.identifier.scopus2-s2.0-84960342547
dc.identifier.wos000372733800010
dc.type.versionpublishedVersion


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Приказ основних података о документу