Atomic-scale view of redox-induced reversible changes to a metal-oxide catalytic surface

VOx/α-Fe2O3(0001)

Chang Yong Kim, Anthony A. Escuadro, Peter C Stair, Michael J. Bedzyk

Research output: Contribution to journalArticle

15 Citations (Scopus)

Abstract

X-ray standing wave (XSW) analysis and X-ray photoelectron spectroscopy are used to trace the electronic and atomic-scale structural changes of a supported vanadium oxide system at different stages of its oxidation-reduction cycle. Both the oxidation state and adsorption geometry of the vanadium oxide and its α-Fe2O2(0001) single crystal support show reversible changes through the oxidation-reduction cycle characteristic of catalytic behavior. The 3D V atomic distribution maps, derived from the summation of the XSW measured Fourier components, reveal that the V undergoes adsorption site exchange during the oxidation and reduction cycle.

Original languageEnglish
Pages (from-to)1874-1877
Number of pages4
JournalJournal of Physical Chemistry C
Volume111
Issue number5
DOIs
Publication statusPublished - Feb 8 2007

Fingerprint

Vanadium
Oxides
metal oxides
Metals
Adsorption
X rays
Oxidation
oxidation
vanadium oxides
standing waves
cycles
Ion exchange
X ray photoelectron spectroscopy
Single crystals
adsorption
x rays
Geometry
photoelectron spectroscopy
Oxidation-Reduction
single crystals

ASJC Scopus subject areas

  • Physical and Theoretical Chemistry
  • Electronic, Optical and Magnetic Materials
  • Surfaces, Coatings and Films
  • Energy(all)

Cite this

Atomic-scale view of redox-induced reversible changes to a metal-oxide catalytic surface : VOx/α-Fe2O3(0001). / Kim, Chang Yong; Escuadro, Anthony A.; Stair, Peter C; Bedzyk, Michael J.

In: Journal of Physical Chemistry C, Vol. 111, No. 5, 08.02.2007, p. 1874-1877.

Research output: Contribution to journalArticle

Kim, Chang Yong ; Escuadro, Anthony A. ; Stair, Peter C ; Bedzyk, Michael J. / Atomic-scale view of redox-induced reversible changes to a metal-oxide catalytic surface : VOx/α-Fe2O3(0001). In: Journal of Physical Chemistry C. 2007 ; Vol. 111, No. 5. pp. 1874-1877.
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