Journalartikel

Jahr der Veröffentlichung: 2012

Seiten: 1912-1920

Zeitschrift: Journal of Physical Chemistry C

Bandnummer: 116

Heftnummer: 2

ISSN: 1932-7447

eISSN: 1932-7455

DOI Link: https://doi.org/10.1021/jp209645t

Verlag: American Chemical Society

Abstract: 
The oxidation of platinum (Pt) plays a key role in electrochemistry, both in the solid and liquid state, and in surface science. This work provides a comprehensive comparison of current knowledge of Pt oxidation in these three fields. By presenting new data of the solid state epitaxial model-type interface Pt(111)/yttria-stabilized zironia (YSZ (111)), fundamental insights are obtained: (i) analogous features in cyclic voltammograms of the interfaces Pt(111)/acid aqueous electrolyte and Pt(111)/YSZ(111) are correlated and their differences explained. (ii) By comparing the cathodic peak shapes of cyclic voltammograms of Pt/YSZ to temperature-programmed desorption spectra, the peaks can be attributed to an adsorption and an oxide-like state of oxygen. (iii) The linearity between the accumulation of oxygen at the Pt electrode and the logarithm of polarization time for sufficiently high anodic potentials, which is well-known in aqueous electrochemistry, is also found at the interface Pt/YSZ for the first time, and the mechanism leading to this time law is discussed.

Harvard-Zitierstil: Pöpke, H., Mutoro, E., Luerssen, B. and Janek, J. (2012) Oxidation of Platinum in the Epitaxial Model System Pt(111)/YSZ(111): Quantitative Analysis of an Electrochemically Driven PtOx Formation, Journal of Physical Chemistry C, 116(2), pp. 1912-1920. https://doi.org/10.1021/jp209645t

APA-Zitierstil: Pöpke, H., Mutoro, E., Luerssen, B., & Janek, J. (2012). Oxidation of Platinum in the Epitaxial Model System Pt(111)/YSZ(111): Quantitative Analysis of an Electrochemically Driven PtOx Formation. Journal of Physical Chemistry C. 116(2), 1912-1920. https://doi.org/10.1021/jp209645t