Study on the electroreduction of In(III) ions at gold from acidic bromide solutions by the rotating ring-disc electrode technique
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Abstract
The mechanism of the indium electrodeposition on gold from acidic KBr solutions has been investigated by means of the rotating ring-disc electrode technique. The measurements showed that the overall electrode reaction In(III) + 3 e → In consists of two successive charge transfer steps, i.e. In(III) + 2 e → In(I) and In(I) + e → In, with soluble monovalent indium as an intermediate. The current efficiency for In(I) generation under steady-state conditions is 100% in the case of low disc current densities. The disproportionation of In(I) in the bulk of solution occurs in slightly acidified solutions,pH=2, in addition to the In(I) electrochemical reduction. Based on the ring current transients, it was established that the two-electron transfer step is preceded by the formation of a thin passive film of indium metal.
DOI: 10.1007/BF00798275
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<record><TEI><teiHeader><fileDesc><titleStmt><title>Study on the electroreduction of In(III) ions at gold from acidic bromide solutions by the rotating ring-disc electrode technique</title><author><name>Jan Malyszko</name><affiliation wicri:level="1"><mods:affiliation>Institute of Chemistry, Pedagogical University, PL-25-020, Kielce, Poland</mods:affiliation><country xml:lang="fr">Pologne</country><wicri:regionArea>Institute of Chemistry, Pedagogical University, PL-25-020, Kielce</wicri:regionArea><wicri:noRegion>Kielce</wicri:noRegion></affiliation></author><author><name>Ewa Malyszko</name><affiliation wicri:level="1"><mods:affiliation>Institute of Chemistry, Pedagogical University, PL-25-020, Kielce, Poland</mods:affiliation><country xml:lang="fr">Pologne</country><wicri:regionArea>Institute of Chemistry, Pedagogical University, PL-25-020, Kielce</wicri:regionArea><wicri:noRegion>Kielce</wicri:noRegion></affiliation></author></titleStmt><publicationStmt><idno type="RBID">ISTEX:706_1985_Article_BF00798275.pdf</idno><date when="1985">1985</date><idno type="doi">10.1007/BF00798275</idno><idno type="wicri:Area/Main/Corpus">000483</idno><idno type="wicri:Area/Main/Curation">000483</idno><idno type="wicri:Area/Main/Exploration">000664</idno></publicationStmt></fileDesc><profileDesc><textClass><keywords scheme="KwdEn" xml:lang="en"><term>Electroreduction</term><term>Indium</term><term>Indous ion</term><term>Multi-step electrode reaction</term><term>Rotating ring-disc electrode</term></keywords></textClass></profileDesc></teiHeader><front><div type="abstract" xml:lang="eng">The mechanism of the indium electrodeposition on gold from acidic KBr solutions has been investigated by means of the rotating ring-disc electrode technique. The measurements showed that the overall electrode reaction In(III) + 3 e → In consists of two successive charge transfer steps, i.e. In(III) + 2 e → In(I) and In(I) + e → In, with soluble monovalent indium as an intermediate. The current efficiency for In(I) generation under steady-state conditions is 100% in the case of low disc current densities. The disproportionation of In(I) in the bulk of solution occurs in slightly acidified solutions,pH=2, in addition to the In(I) electrochemical reduction. Based on the ring current transients, it was established that the two-electron transfer step is preceded by the formation of a thin passive film of indium metal.</div></front></TEI><mods xsi:schemaLocation="http://www.loc.gov/mods/v3 file:///applis/istex/home/loadistex/home/etc/xsd/mods.xsd" version="3.4" istexId="545acd388d187455ee414afefffb7024cdbd0755"><titleInfo lang="eng"><title>Study on the electroreduction of In(III) ions at gold from acidic bromide solutions by the rotating ring-disc electrode technique</title></titleInfo><titleInfo lang="ger"><title>Untersuchung der elektrochemischen Reduktion von In(III)-Ionen an Gold in sauren Bromidlösungen mit der rotierenden Ring-Scheiben-Elektrode</title></titleInfo><name type="personal"><namePart type="given">Jan</namePart><namePart type="family">Malyszko</namePart><role><roleTerm type="text">author</roleTerm></role><affiliation>Institute of Chemistry, Pedagogical University, PL-25-020, Kielce, Poland</affiliation></name><name type="personal"><namePart type="given">Ewa</namePart><namePart type="family">Malyszko</namePart><role><roleTerm type="text">author</roleTerm></role><affiliation>Institute of Chemistry, Pedagogical University, PL-25-020, Kielce, Poland</affiliation></name><typeOfResource>text</typeOfResource><genre>Anorganische Und Physikalische Chemie</genre><genre>Original Paper</genre><originInfo><publisher>Springer-Verlag, Vienna</publisher><dateCreated encoding="w3cdtf">1984-02-09</dateCreated><dateCaptured encoding="w3cdtf">1984-05-08</dateCaptured><dateValid encoding="w3cdtf">2004-11-26</dateValid><copyrightDate encoding="w3cdtf">1985</copyrightDate></originInfo><language><languageTerm type="code" authority="iso639-2b">eng</languageTerm></language><physicalDescription><internetMediaType>text/html</internetMediaType></physicalDescription><abstract lang="eng">The mechanism of the indium electrodeposition on gold from acidic KBr solutions has been investigated by means of the rotating ring-disc electrode technique. The measurements showed that the overall electrode reaction In(III) + 3 e → In consists of two successive charge transfer steps, i.e. In(III) + 2 e → In(I) and In(I) + e → In, with soluble monovalent indium as an intermediate. The current efficiency for In(I) generation under steady-state conditions is 100% in the case of low disc current densities. The disproportionation of In(I) in the bulk of solution occurs in slightly acidified solutions,pH=2, in addition to the In(I) electrochemical reduction. Based on the ring current transients, it was established that the two-electron transfer step is preceded by the formation of a thin passive film of indium metal.</abstract><abstract lang="ger">Mit Hilfe der rotierenden Ring-Scheiben-Elektrode wurde der Mechanismus der kathodischen Abscheidung von Indium auf Gold in sauren KBr-Lösungen untersucht. Aus den Messungen folgt, daß die Bruttoreaktion In(III) + 3e → In über zwei aufeinanderfolgende Durchtrittsreaktionen, In(III) + 2 e → In(I) und In(I) + e → In, mit löslichem einwertigem Indium als Zwischenprodukt abläuft. Bei kleinen Stromdichten werden die In(I)-Ionen mit 100%iger Stromausbeute erzeugt. In schwächer sauren Lösungen (pH=2) konnte außer der elektrochemischen Reduktion von In(I) zusätzlich dessen Disproportionierung innerhalb der Lösung ermittelt werden. Auf Grund der Ringstrom-Zeit-Kurven wurde auch festgestellt, daß die Bildung von einer dünnen In-Metallschicht, die ein passives Verhalten aufweist, dem Zweielektronenübergang vorangegangen ist.</abstract><subject lang="eng"><genre>Keywords</genre><topic>Electroreduction</topic><topic>Indium</topic><topic>Indous ion</topic><topic>Multi-step electrode reaction</topic><topic>Rotating ring-disc electrode</topic></subject><relatedItem type="series"><titleInfo type="abbreviated"><title>Monatsh Chem</title></titleInfo><titleInfo><title>Monatshefte für Chemie / Chemical Monthly</title><partNumber>Year: 1985</partNumber><partNumber>Volume: 116</partNumber><partNumber>Number: 1</partNumber></titleInfo><genre>Archive Journal</genre><originInfo><dateIssued encoding="w3cdtf">1985-01-01</dateIssued><copyrightDate encoding="w3cdtf">1985</copyrightDate></originInfo><subject usage="primary"><topic>Chemistry</topic><topic>Chemistry/Food Science, general</topic><topic>Analytical Chemistry</topic><topic>Inorganic Chemistry</topic><topic>Organic Chemistry</topic><topic>Physical Chemistry</topic><topic>Theoretical and Computational Chemistry</topic></subject><identifier type="issn">0026-9247</identifier><identifier type="issn">Electronic: 1434-4475</identifier><identifier type="matrixNumber">706</identifier><identifier type="local">IssueArticleCount: 17</identifier><recordInfo><recordOrigin>Springer-Verlag, 1985</recordOrigin></recordInfo></relatedItem><identifier type="doi">10.1007/BF00798275</identifier><identifier type="matrixNumber">Art3</identifier><identifier type="local">BF00798275</identifier><accessCondition type="use and reproduction">MetadataGrant: OpenAccess</accessCondition><accessCondition type="use and reproduction">AbstractGrant: OpenAccess</accessCondition><accessCondition type="restriction on access">BodyPDFGrant: Restricted</accessCondition><accessCondition type="restriction on access">BodyHTMLGrant: Restricted</accessCondition><accessCondition type="restriction on access">BibliographyGrant: Restricted</accessCondition><accessCondition type="restriction on access">ESMGrant: Restricted</accessCondition><part><extent unit="pages"><start>19</start><end>32</end></extent></part><recordInfo><recordOrigin>Springer-Verlag, 1985</recordOrigin><recordIdentifier>706_1985_Article_BF00798275.pdf</recordIdentifier></recordInfo></mods></record>Pour manipuler ce document sous Unix (Dilib)
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