Initial stages of Pt(111) electrooxidation: dynamic and structural studies by surface X-ray diffraction

Simple item page
dc.contributor.authorDrneca, Jakub
dc.contributor.authorRuge, Martin
dc.contributor.authorReikowski, Finn
dc.contributor.authorRahn, Bjorn
dc.contributor.authorCarla, Francesco
dc.contributor.authorFelici, Roberto
dc.contributor.authorStettner, Jochim
dc.contributor.authorMagnussen, Olaf M.
dc.contributor.authorHarrington, David A.
dc.date.accessioned2019-05-03T12:31:12Z
dc.date.available2019-05-03T12:31:12Z
dc.date.copyright2017en_US
dc.date.issued2017
dc.description.abstractIn-situ surface X-ray diffraction is used to characterize the surface oxides on a Pt(111) surface in 0.1 M HClO4. Detailed analysis at two potentials confirms that the surface restructuring in the initial oxidation stages is consistent with a place exchange process between Pt and O atoms, and the exchanged Pt atoms are located above their original positions in the Pt(111) lattice. The (1,1,1.5) reflection is used to dynamically study the surface during cyclic voltammetry. The restructuring associated with the place exchange initiates with the CV peak at 1.05 V, even though multiple cycles to 1.17 V lead to no changes in the CV. The restructuring is reversible below a critical coverage of place exchanged Pt atoms, which we estimate to be between 0.07 and 0.15 ML. Extensive cycling to potentials higher or equal to 1.17 V leads to progressive disordering of the surface.en_US
dc.description.reviewstatusRevieweden_US
dc.description.scholarlevelFacultyen_US
dc.description.sponsorshipDAH thanks NSERC for financial support of this work. MR, FR, JS, and OMM gratefully acknowledge financial support by the Deutsche Forschungsgemeinschaft via MA1618/13-5. All authors thank ESRF ID03 beamline staff (Helena Isern and Thomas Dufrane) for technical support.en_US
dc.identifier.citationDrnec, J., Ruge, M., Reikowski, F., Rahn, B., Carla, F., Felici, R., Stettner, J., Magnussen, O. & Harrington, D.A. (2017). Initial stages of Pt(111) electrooxidation: dynamic and structural studies by surface X-ray diffraction. Electrochimica Acta, 224, 220-227. https://doi.org/10.1016/j.electacta.2016.12.028en_US
dc.identifier.urihttp://dx.doi.org/10.1016/j.electacta.2016.12.028
dc.identifier.urihttp://hdl.handle.net/1828/10838
dc.language.isoenen_US
dc.publisherElectrochimica Actaen_US
dc.subjectPt(111) oxidation
dc.subjectOxide
dc.subjectPlace exchange
dc.subjectSurface X-ray diffraction
dc.subject.departmentDepartment of Chemistry
dc.titleInitial stages of Pt(111) electrooxidation: dynamic and structural studies by surface X-ray diffractionen_US
dc.typePostprinten_US

Files

Original bundle
Now showing 1 - 1 of 1
Thumbnail Image
Name:
Drnec_Jakub_ElectrochimActa_2017.pdf
Size:
996.14 KB
Format:
Adobe Portable Document Format
Description:
Download
License bundle
Now showing 1 - 1 of 1
No Thumbnail Available
Name:
license.txt
Size:
1.71 KB
Format:
Item-specific license agreed upon to submission
Description:
Download

Collections

Faculty and Staff Publications
 
University of Victoria Libraries

We acknowledge and respect the Lək̓ʷəŋən (Songhees and Esquimalt) Peoples on whose territory the university stands, and the Lək̓ʷəŋən and W̱SÁNEĆ Peoples whose historical relationships with the land continue to this day.