Confirmation of Cathodic Silence in an Anodic Oxide on Gold.
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| Title: | Confirmation of Cathodic Silence in an Anodic Oxide on Gold. |
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| Authors: | Giron, Rachel Guia P.1, Ferguson, Gregory S.1 gf03@lehigh.edu |
| Source: | Journal of The Electrochemical Society. 2017, Vol. 164 Issue 9, pH635-H638. 4p. |
| Subjects: | Gold electrometallurgy, Oxidation, Electrodes |
| Abstract: | The electrochemical oxidation of a gold electrode supported on an AT-cut quartz crystal in aqueous sulfuric acid resulted in formation of a thin film of gold oxide, and removal of the applied potential led to loss of the oxide. The piezoelectric substrate allowed in situ determination of changes in the potential and the mass of the electrode throughout both processes. Upon opening the circuit (OC), the electrode potential immediately dropped to that characteristic of Au/Au2O3 and remained there until the oxide had been lost. Electrochemical quartz-crystal microgravimetric (EQCM) measurements revealed that the resonant frequency of the crystal behaved similarly, quickly adjusting to a value consistent with approximately a nanometer of Au2O3 and then remaining approximately constant until both the potential and frequency adopted bare-gold values. Reduction of the oxide during the period of constant OC-potential and mass confirmed the onset of cathodic silence --inaccessibility of the oxide to reduction by an applied cathodic potential. [ABSTRACT FROM AUTHOR] |
| Copyright of Journal of The Electrochemical Society is the property of IOP Publishing and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.) | |
| Database: | Engineering Source |
| FullText | Text: Availability: 0 |
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| Header | DbId: egs DbLabel: Engineering Source An: 124590406 AccessLevel: 6 PubType: Academic Journal PubTypeId: academicJournal PreciseRelevancyScore: 0 |
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| Items | – Name: Title Label: Title Group: Ti Data: Confirmation of Cathodic Silence in an Anodic Oxide on Gold. – Name: Author Label: Authors Group: Au Data: <searchLink fieldCode="AR" term="%22Giron%2C+Rachel+Guia+P%2E%22">Giron, Rachel Guia P.</searchLink><relatesTo>1</relatesTo><br /><searchLink fieldCode="AR" term="%22Ferguson%2C+Gregory+S%2E%22">Ferguson, Gregory S.</searchLink><relatesTo>1</relatesTo><i> gf03@lehigh.edu</i> – Name: TitleSource Label: Source Group: Src Data: <searchLink fieldCode="JN" term="%22Journal+of+The+Electrochemical+Society%22">Journal of The Electrochemical Society</searchLink>. 2017, Vol. 164 Issue 9, pH635-H638. 4p. – Name: Subject Label: Subjects Group: Su Data: <searchLink fieldCode="DE" term="%22Gold+electrometallurgy%22">Gold electrometallurgy</searchLink><br /><searchLink fieldCode="DE" term="%22Oxidation%22">Oxidation</searchLink><br /><searchLink fieldCode="DE" term="%22Electrodes%22">Electrodes</searchLink> – Name: Abstract Label: Abstract Group: Ab Data: The electrochemical oxidation of a gold electrode supported on an AT-cut quartz crystal in aqueous sulfuric acid resulted in formation of a thin film of gold oxide, and removal of the applied potential led to loss of the oxide. The piezoelectric substrate allowed in situ determination of changes in the potential and the mass of the electrode throughout both processes. Upon opening the circuit (OC), the electrode potential immediately dropped to that characteristic of Au/Au2O3 and remained there until the oxide had been lost. Electrochemical quartz-crystal microgravimetric (EQCM) measurements revealed that the resonant frequency of the crystal behaved similarly, quickly adjusting to a value consistent with approximately a nanometer of Au2O3 and then remaining approximately constant until both the potential and frequency adopted bare-gold values. Reduction of the oxide during the period of constant OC-potential and mass confirmed the onset of cathodic silence --inaccessibility of the oxide to reduction by an applied cathodic potential. [ABSTRACT FROM AUTHOR] – Name: AbstractSuppliedCopyright Label: Group: Ab Data: <i>Copyright of Journal of The Electrochemical Society is the property of IOP Publishing and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.) |
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| RecordInfo | BibRecord: BibEntity: Identifiers: – Type: doi Value: 10.1149/2.1111709jes Languages: – Code: eng Text: English PhysicalDescription: Pagination: PageCount: 4 StartPage: H635 Subjects: – SubjectFull: Gold electrometallurgy Type: general – SubjectFull: Oxidation Type: general – SubjectFull: Electrodes Type: general Titles: – TitleFull: Confirmation of Cathodic Silence in an Anodic Oxide on Gold. Type: main BibRelationships: HasContributorRelationships: – PersonEntity: Name: NameFull: Giron, Rachel Guia P. – PersonEntity: Name: NameFull: Ferguson, Gregory S. IsPartOfRelationships: – BibEntity: Dates: – D: 01 M: 08 Text: 2017 Type: published Y: 2017 Identifiers: – Type: issn-print Value: 00134651 Numbering: – Type: volume Value: 164 – Type: issue Value: 9 Titles: – TitleFull: Journal of The Electrochemical Society Type: main |
| ResultId | 1 |
