Journalartikel

Jahr der Veröffentlichung: 2020

Seiten: 22956-22962

Zeitschrift: Physical Chemistry Chemical Physics

Bandnummer: 22

Heftnummer: 40

ISSN: 1463-9076

Open Access Status: Green

DOI Link: https://doi.org/10.1039/d0cp03811c

Verlag: Royal Society of Chemistry

Abstract: 
We investigate with in situ surface X-ray diffraction (SXRD) and X-ray reflectivity (XRR) experiments the cathodic stability of an ultrathin single-crystalline IrO2(110) film with a regular array of mesoscopic rooflike structures that is supported on a RuO2(110)/Ru(0001) template. It turns out that the planarity of the single-crystalline IrO2(110) film is lost in that IrO2(110) oxide domains delaminate at a cathodic potential of -0.18 V. Obviously, the electrolyte solution is able to reach the RuO2(110) layer presumably through the surface grain boundaries of the IrO2(110) layer. Subsequently, the single-crystalline RuO2(110) structure-directing template is reduced to amorphous hydrous RuO2, with the consequence that the IrO2(110) film loses partly its adhesion to the template. From in situ XRR experiments we find that the IrO2(110) film does not swell upon cathodic polarization down to -0.18 V, while from in situ SXRD experiments, the lattice constants of IrO2(110) are shown to be not affected. The rooflike mesostructure of the IrO2(110) flakes remains intact after cathodic polarization to -0.18 V, evidencing that the crystallinity of IrO2(110) is retained.

Harvard-Zitierstil: Weber, T., Abb, M., Evertsson, J., Sandroni, M., Drnec, J., Vonk, V., et al. (2020) In situ studies of the cathodic stability of single-crystalline IrO2(110) ultrathin films supported on RuO2(110)/Ru(0001) in an acidic environment, Physical Chemistry Chemical Physics, 22(40), pp. 22956-22962. https://doi.org/10.1039/d0cp03811c

APA-Zitierstil: Weber, T., Abb, M., Evertsson, J., Sandroni, M., Drnec, J., Vonk, V., Stierle, A., Lundgren, E., & Over, H. (2020). In situ studies of the cathodic stability of single-crystalline IrO2(110) ultrathin films supported on RuO2(110)/Ru(0001) in an acidic environment. Physical Chemistry Chemical Physics. 22(40), 22956-22962. https://doi.org/10.1039/d0cp03811c