Skip to main content

Lund University Publications

LUND UNIVERSITY LIBRARIES

In situ studies of the cathodic stability of single-crystalline IrO2(110) ultrathin films supported on RuO2(110)/Ru(0001) in an acidic environment

Weber, Tim ; Abb, Marcel J.S. ; Evertsson, Jonas LU ; Sandroni, Martina ; Drnec, Jakub ; Vonk, Vedran ; Stierle, Andreas ; Lundgren, Edvin LU and Over, Herbert (2020) In Physical Chemistry Chemical Physics 22(40). p.22956-22962
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... (More)

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. This journal is

(Less)
Please use this url to cite or link to this publication:
author
; ; ; ; ; ; ; and
organization
publishing date
type
Contribution to journal
publication status
published
subject
in
Physical Chemistry Chemical Physics
volume
22
issue
40
pages
7 pages
publisher
Royal Society of Chemistry
external identifiers
  • scopus:85094220816
  • pmid:33026372
ISSN
1463-9076
DOI
10.1039/d0cp03811c
language
English
LU publication?
yes
id
50da3c15-578a-4186-9baf-aa89dcce960e
date added to LUP
2021-01-13 10:09:58
date last changed
2024-04-03 22:06:50
@article{50da3c15-578a-4186-9baf-aa89dcce960e,
  abstract     = {{<p>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. This journal is </p>}},
  author       = {{Weber, Tim and Abb, Marcel J.S. and Evertsson, Jonas and Sandroni, Martina and Drnec, Jakub and Vonk, Vedran and Stierle, Andreas and Lundgren, Edvin and Over, Herbert}},
  issn         = {{1463-9076}},
  language     = {{eng}},
  month        = {{10}},
  number       = {{40}},
  pages        = {{22956--22962}},
  publisher    = {{Royal Society of Chemistry}},
  series       = {{Physical Chemistry Chemical Physics}},
  title        = {{In situ studies of the cathodic stability of single-crystalline IrO<sub>2</sub>(110) ultrathin films supported on RuO<sub>2</sub>(110)/Ru(0001) in an acidic environment}},
  url          = {{http://dx.doi.org/10.1039/d0cp03811c}},
  doi          = {{10.1039/d0cp03811c}},
  volume       = {{22}},
  year         = {{2020}},
}