uu.seUppsala University Publications
Change search
CiteExportLink to record
Permanent link

Direct link
Cite
Citation style
  • apa
  • ieee
  • modern-language-association
  • vancouver
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf
Considerations for the Cyclic Voltammetry of Gold in Sulfuric Acid Solutions
Uppsala University, Disciplinary Domain of Science and Technology, Technology, Department of Engineering Sciences, Solid State Electronics. Uppsala University. (Zhen Zhang's group)
Uppsala University, Disciplinary Domain of Science and Technology, Technology, Department of Engineering Sciences, Solid State Electronics. (Zhen Zhang's group)ORCID iD: 0000-0003-3843-7198
Uppsala University, Disciplinary Domain of Science and Technology, Chemistry, Department of Chemistry - BMC, Analytical Chemistry.
Uppsala University, Disciplinary Domain of Science and Technology, Technology, Department of Engineering Sciences, Solid State Electronics.
Show others and affiliations
2018 (English)Conference paper, Poster (with or without abstract) (Other academic)
Abstract [en]

A comprehensive understanding of the cyclic voltammetry (CV) for gold surfaces is essential for advanced applications. In the present study, a series of experiments were designed to investigate CV for gold under different experimental conditions when using a conventional configuration of a Ag/AgCl/sat. KCl reference electrode and a platinum wire counter electrode. The interferences introduced by the configuration were reflected in the three fingerprint regions of the voltammograms. It was found that the shape of the voltammograms was less reproducible at a lower sample volume when the cycle number was increased. This observation could be explained by different concentrations of Cl- leaking from the reference electrode and platinum dissolved from the counter electrode. The reproducibility of the gold oxidation and reduction (Ox/Re) region in the voltammograms was improved when gold dissolution and re-deposition caused by Cl- leakage was eliminated by using a bridge. In the hydrogen evolution and oxidation reactions (HER/HOR) region the catalytic performance of the gold electrode could be minimized by replacing the platinum counter electrode with a graphite rod. Alternatively, it could be enhanced by increasing the surface ratio of the co-deposited platinum to gold. In the electric double layer (EDL) region, peaks dependent on the concentrations of Cl- and SO42- were observed. To account for the occurrence of these peaks, a new mechanism based on the formation of neutral gold (I) complexes at very low Au+ concentrations, was proposed. 

Place, publisher, year, edition, pages
2018.
National Category
Physical Chemistry Other Chemical Engineering
Identifiers
URN: urn:nbn:se:uu:diva-363362OAI: oai:DiVA.org:uu-363362DiVA, id: diva2:1256630
Conference
69th Annual Meeting of the International Society of Electrochemistry in Bologna
Available from: 2018-10-17 Created: 2018-10-17 Last updated: 2018-10-18Bibliographically approved

Open Access in DiVA

attachment(48 kB)19 downloads
File information
File name ATTACHMENT01.pdfFile size 48 kBChecksum SHA-512
85c6cf8ab7718df0399f6c0c78797d55c108c451933e85fbe054f781e0691ba4aaa41c24664795072f306fdda7506f3805089b9615995793a07d457b97b9add8
Type attachmentMimetype application/pdf

Authority records BETA

Xu, XingxingMakaraviciute, AstaPettersson, JeanZhang, Shi-LiZhang, Zhen

Search in DiVA

By author/editor
Xu, XingxingMakaraviciute, AstaPettersson, JeanZhang, Shi-LiZhang, Zhen
By organisation
Solid State ElectronicsAnalytical Chemistry
Physical ChemistryOther Chemical Engineering

Search outside of DiVA

GoogleGoogle Scholar
The number of downloads is the sum of all downloads of full texts. It may include eg previous versions that are now no longer available

urn-nbn

Altmetric score

urn-nbn
Total: 219 hits
CiteExportLink to record
Permanent link

Direct link
Cite
Citation style
  • apa
  • ieee
  • modern-language-association
  • vancouver
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf