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

doi:10.1021/jp067862s

Atomic-scale view of redox-induced reversible changes to a metal-oxide catalytic surface: VO_x/α-Fe₂O₃(0001)

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

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

17 Scopus citations

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 language	English (US)
Pages (from-to)	1874-1877
Number of pages	4
Journal	Journal of Physical Chemistry C
Volume	111
Issue number	5
DOIs	https://doi.org/10.1021/jp067862s
State	Published - Feb 8 2007

ASJC Scopus subject areas

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

Access to Document

10.1021/jp067862s

Cite this

@article{4134a7f905104fd591c11940b0c27566,

title = "Atomic-scale view of redox-induced reversible changes to a metal-oxide catalytic surface: VOx/α-Fe2O3(0001)",

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.",

author = "Kim, {Chang Yong} and Escuadro, {Anthony A.} and Stair, {Peter C.} and Bedzyk, {Michael J.}",

year = "2007",

month = feb,

day = "8",

doi = "10.1021/jp067862s",

language = "English (US)",

volume = "111",

pages = "1874--1877",

journal = "Journal of Physical Chemistry C",

issn = "1932-7447",

publisher = "American Chemical Society",

number = "5",

}

TY - JOUR

T1 - Atomic-scale view of redox-induced reversible changes to a metal-oxide catalytic surface

T2 - VOx/α-Fe2O3(0001)

AU - Kim, Chang Yong

AU - Escuadro, Anthony A.

AU - Stair, Peter C.

AU - Bedzyk, Michael J.

PY - 2007/2/8

Y1 - 2007/2/8

N2 - 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.

AB - 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.

UR - http://www.scopus.com/inward/record.url?scp=33847394933&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=33847394933&partnerID=8YFLogxK

U2 - 10.1021/jp067862s

DO - 10.1021/jp067862s

M3 - Article

AN - SCOPUS:33847394933

VL - 111

SP - 1874

EP - 1877

JO - Journal of Physical Chemistry C

JF - Journal of Physical Chemistry C

SN - 1932-7447

IS - 5

ER -

Atomic-scale view of redox-induced reversible changes to a metal-oxide catalytic surface: VO_x/α-Fe₂O₃(0001)

Abstract

ASJC Scopus subject areas

Access to Document

Other files and links

Fingerprint

Cite this