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dc.contributor.authorAsbjornsson, J
dc.contributor.authorKelsall, GH
dc.contributor.authorVaughan, DJ
dc.contributor.authorPattrick, RAD
dc.contributor.authorWincott, PL
dc.contributor.authorHope, GA
dc.contributor.editorH D Abruna
dc.date.accessioned2017-05-03T11:12:04Z
dc.date.available2017-05-03T11:12:04Z
dc.date.issued2004
dc.date.modified2007-03-18T21:33:45Z
dc.identifier.issn1572-6657
dc.identifier.urihttp://hdl.handle.net/10072/5708
dc.description.abstractThe electrochemical oxidation and reduction of the surface of a natural tennantite has been investigated in 0.1 M HCl solution using cyclic voltammetry, chronoamperometry and a rotating ring-disc electrode. Subsequent surface analyses by in situ Raman spectroscopy and ex situ X-ray photoelectron spectroscopy (XPS), together with aqueous phase analysis by inductively coupled plasma-atomic emission spectrometry (ICP-AES) were used to aid in the interpretation of the electrochemical behaviour of this complex system, coupled with Nernst equation predictions of the surface reactions. The XPS results indicated that elemental sulfur, arsenic(III) and arsenic(V) oxides were formed on the surface at electrode potentials of 0 and 0.6 V (SCE), respectively. The Raman spectra of tennantite showed that elemental sulfur was detected on the electrode surface only at potentials 1 V (SCE), at least for the charge densities passed after 500 s. At potentials <-0.4 V (SCE), the intensities of the characteristic Raman spectra for sulfur decreased with decreasing potentials, due to the dissolution of sulfur as H2S (and possibly arsenic as AsH3), leaving Cu3As or elemental copper and iron accumulating on the surface.
dc.description.peerreviewedYes
dc.description.publicationstatusYes
dc.languageEnglish
dc.language.isoen_AU
dc.publisherElsevier Science
dc.publisher.placeSwitzerland
dc.publisher.urihttp://www.elsevier.com/wps/find/journaldescription.cws_home/504087/description#description
dc.relation.ispartofpagefrom145
dc.relation.ispartofpageto152
dc.relation.ispartofjournalJournal of Electroanalytical Chemistry
dc.relation.ispartofvolume570
dc.subject.fieldofresearchAnalytical Chemistry
dc.subject.fieldofresearchTheoretical and Computational Chemistry
dc.subject.fieldofresearchcode0301
dc.subject.fieldofresearchcode0307
dc.titleElectrochemical and Surface Analytical Studies of Tennantite in Acid Solution
dc.typeJournal article
dc.type.descriptionC1 - Articles
dc.type.codeC - Journal Articles
gro.rights.copyright© 2004 Elsevier : Reproduced in accordance with the copyright policy of the publisher : This journal is available online - use hypertext links.
gro.date.issued2004
gro.hasfulltextNo Full Text
gro.griffith.authorHope, Gregory A.


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