Electrochemical behaviour of an indium electrode in concentrated KOH solutions at different temperatures
Identifieur interne : 000383 ( Main/Exploration ); précédent : 000382; suivant : 000384Electrochemical behaviour of an indium electrode in concentrated KOH solutions at different temperatures
Auteurs : RBID : ISTEX:706_1991_Article_BF00811110.pdfEnglish descriptors
Abstract
The electrochemical behaviour of pure indium in KOH solutions (1–4M) was studied at different temperatures (25–70°C) by potentiostatic techniques. Two anodic peaks corresponding to the formation of In(OH)3 and In2O3 were observed. The heights of the two peaks increased with the increase of alkali concentration. An increase of temperature increased the peak currents and shifted their corresponding potentials to more negative values. The variation of the peak currents and peak potentials with scan rate suggested that the anodic dissolution of indium was a diffusion controlled process. In cyclic voltammetry, the reverse scan consistently showed one peak which was attributed to the reduction of anodic oxidation products into indium. X-ray diffraction analysis confirmed the presence of In(OH)3 at the first anodic peak, In(OH)3 and In2O3 at the second anodic peak and In2O3 in the permanent passive region.
DOI: 10.1007/BF00811110
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<record><TEI><teiHeader><fileDesc><titleStmt><title>Electrochemical behaviour of an indium electrode in concentrated KOH solutions at different temperatures</title><author><name>A. El Sayed</name><affiliation wicri:level="1"><mods:affiliation>Department of Chemistry, Faculty of Science, Sohag University, Sohag, Egypt</mods:affiliation><country xml:lang="fr">Égypte</country><wicri:regionArea>Department of Chemistry, Faculty of Science, Sohag University, Sohag</wicri:regionArea><wicri:noRegion>Sohag</wicri:noRegion></affiliation></author><author><name>S. S. Abd El Rehim</name><affiliation wicri:level="1"><mods:affiliation>Department of Chemistry, Faculty of Science, Ain Shams University, Kairo, Egypt</mods:affiliation><country xml:lang="fr">Égypte</country><wicri:regionArea>Department of Chemistry, Faculty of Science, Ain Shams University, Kairo</wicri:regionArea><wicri:noRegion>Kairo</wicri:noRegion></affiliation></author><author><name>H. Mansour</name><affiliation wicri:level="1"><mods:affiliation>Department of Chemistry, Faculty of Science, Qena University, Egypt</mods:affiliation><country xml:lang="fr">Égypte</country><wicri:regionArea>Department of Chemistry, Faculty of Science, Qena University</wicri:regionArea><wicri:noRegion>Qena University</wicri:noRegion></affiliation></author></titleStmt><publicationStmt><idno type="RBID">ISTEX:706_1991_Article_BF00811110.pdf</idno><date when="1991">1991</date><idno type="doi">10.1007/BF00811110</idno><idno type="wicri:Area/Main/Corpus">000A32</idno><idno type="wicri:Area/Main/Curation">000A32</idno><idno type="wicri:Area/Main/Exploration">000383</idno></publicationStmt></fileDesc><profileDesc><textClass><keywords scheme="KwdEn" xml:lang="en"><term>Alkaline solutions</term><term>Indium electrode</term><term>Potentiostatic electrochemical behaviour</term></keywords></textClass></profileDesc></teiHeader><front><div type="abstract" xml:lang="eng">The electrochemical behaviour of pure indium in KOH solutions (1–4M) was studied at different temperatures (25–70°C) by potentiostatic techniques. Two anodic peaks corresponding to the formation of In(OH)3 and In2O3 were observed. The heights of the two peaks increased with the increase of alkali concentration. An increase of temperature increased the peak currents and shifted their corresponding potentials to more negative values. The variation of the peak currents and peak potentials with scan rate suggested that the anodic dissolution of indium was a diffusion controlled process. In cyclic voltammetry, the reverse scan consistently showed one peak which was attributed to the reduction of anodic oxidation products into indium. X-ray diffraction analysis confirmed the presence of In(OH)3 at the first anodic peak, In(OH)3 and In2O3 at the second anodic peak and In2O3 in the permanent passive region.</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="b60983969d30e7ee5ee7cc72df60e875056ec38c"><titleInfo lang="eng"><title>Electrochemical behaviour of an indium electrode in concentrated KOH solutions at different temperatures</title></titleInfo><titleInfo lang="ger"><title>Zum elektrochemischen Verhalten einer Indium-Elektrode in konzentrierter Kalilauge bei verschiedenen Temperaturen</title></titleInfo><name type="personal"><namePart type="given">A.</namePart><namePart type="family">El Sayed</namePart><role><roleTerm type="text">author</roleTerm></role><affiliation>Department of Chemistry, Faculty of Science, Sohag University, Sohag, Egypt</affiliation></name><name type="personal"><namePart type="given">S. S.</namePart><namePart type="family">Abd El Rehim</namePart><role><roleTerm type="text">author</roleTerm></role><affiliation>Department of Chemistry, Faculty of Science, Ain Shams University, Kairo, Egypt</affiliation></name><name type="personal"><namePart type="given">H.</namePart><namePart type="family">Mansour</namePart><role><roleTerm type="text">author</roleTerm></role><affiliation>Department of Chemistry, Faculty of Science, Qena University, Egypt</affiliation></name><typeOfResource>text</typeOfResource><genre>Anorganische Und Physikalische Chemie</genre><genre>Original Paper</genre><originInfo><publisher>Springer-Verlag, Vienna</publisher><dateCreated encoding="w3cdtf">1990-05-02</dateCreated><dateCaptured encoding="w3cdtf">1991-05-13</dateCaptured><dateValid encoding="w3cdtf">2004-11-29</dateValid><copyrightDate encoding="w3cdtf">1991</copyrightDate></originInfo><language><languageTerm type="code" authority="iso639-2b">eng</languageTerm></language><physicalDescription><internetMediaType>text/html</internetMediaType></physicalDescription><abstract lang="eng">The electrochemical behaviour of pure indium in KOH solutions (1–4M) was studied at different temperatures (25–70°C) by potentiostatic techniques. Two anodic peaks corresponding to the formation of In(OH)3 and In2O3 were observed. The heights of the two peaks increased with the increase of alkali concentration. An increase of temperature increased the peak currents and shifted their corresponding potentials to more negative values. The variation of the peak currents and peak potentials with scan rate suggested that the anodic dissolution of indium was a diffusion controlled process. In cyclic voltammetry, the reverse scan consistently showed one peak which was attributed to the reduction of anodic oxidation products into indium. X-ray diffraction analysis confirmed the presence of In(OH)3 at the first anodic peak, In(OH)3 and In2O3 at the second anodic peak and In2O3 in the permanent passive region.</abstract><abstract lang="ger">Es wurde das Verhalten von reinem Indium in 1 – 4M KOH-Lösungen bei Temperaturen zwischen 25 und 70°C mittels potentiostatischer Methoden untersucht. Zwei anodische Peaks, entsprechend der Bildung von In(OH)3 und In2O3, traten auf. Die Höhe der beiden Peaks wurde mit zunehmender Alkalikonzentration gesteigert. Eine Temperaturerhöhung verstärkte die Peakströme und verschob die entsprechenden Potentiale zu negativeren Werten. Die Abhängigkeit der Peakströme und Peakpotentiale von der Scangeschwindigkeit legte den Schluß nahe, daß die anodische Lösung von Indium in einem diffusionskontrollierten Prozeß stattfindet. Bei der cyclischen Voltammetrie zeigte der reverse Scan einheitlich einen Peak, der der Reduktion der anodischen Oxidationsprodukte zu Indium zugeschrieben wurde. Röntgendiffraktionsanalyse bestätigte die Präsenz von In(OH)3 beim ersten anodischen Peak, In(OH)3 beim zweiten Peak und In2O3 im permanent passiven Bereich.</abstract><subject lang="eng"><genre>Keywords</genre><topic>Potentiostatic electrochemical behaviour</topic><topic>Indium electrode</topic><topic>alkaline solutions</topic></subject><relatedItem type="series"><titleInfo type="abbreviated"><title>Monatsh Chem</title></titleInfo><titleInfo><title>Monatshefte für Chemie / Chemical Monthly</title><partNumber>Year: 1991</partNumber><partNumber>Volume: 122</partNumber><partNumber>Number: 12</partNumber></titleInfo><genre>Archive Journal</genre><originInfo><dateIssued encoding="w3cdtf">1991-12-01</dateIssued><copyrightDate encoding="w3cdtf">1991</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: 12</identifier><recordInfo><recordOrigin>Springer-Verlag, 1991</recordOrigin></recordInfo></relatedItem><identifier type="doi">10.1007/BF00811110</identifier><identifier type="matrixNumber">Art3</identifier><identifier type="local">BF00811110</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>1019</start><end>1027</end></extent></part><recordInfo><recordOrigin>Springer-Verlag, 1991</recordOrigin><recordIdentifier>706_1991_Article_BF00811110.pdf</recordIdentifier></recordInfo></mods></record>Pour manipuler ce document sous Unix (Dilib)
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