Step and point defect effects on TiO2(100) reactivity

C. A. Muryn; P. J. Hardman; J. J. Crouch; G. N. Raiker; G. Thornton; D. S.L. Law

doi:10.1016/0039-6028(91)91091-B

Step and point defect effects on TiO₂(100) reactivity

C. A. Muryn^*, P. J. Hardman, J. J. Crouch, G. N. Raiker, G. Thornton, D. S.L. Law

^*Corresponding author for this work

School of Engineering - Administration (L5)

UMIST

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Abstract

The influence of steps and point defects on the reactivity of TiO₂(100) to H₂O has been examined using photoemission spectroscopy. A vicinal surface was prepared by polishing a sample 2.6 ± 0.1° off the (100) plane towards [001]. Point defects in the form of oxygen vacancies were introduced onto the stepped and planar 1 × 1 stoichiometric (100) surfaces by thermal annealing, a 1 × 3 ordered defect array being formed. The interaction of H₂O with TiO₂(100) at 130 K and 293 K is found to be independent of O vacancy and step density. H₂O adsorbs molecularly at 130 K and dissociates to form OH at 293 K.

Original language	English
Pages (from-to)	747-752
Number of pages	6
Journal	Surface Science
Volume	251-252
Issue number	C
DOIs	https://doi.org/10.1016/0039-6028(91)91091-B
Publication status	Published - 1 Jul 1991

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title = "Step and point defect effects on TiO2(100) reactivity",

abstract = "The influence of steps and point defects on the reactivity of TiO2(100) to H2O has been examined using photoemission spectroscopy. A vicinal surface was prepared by polishing a sample 2.6 ± 0.1° off the (100) plane towards [001]. Point defects in the form of oxygen vacancies were introduced onto the stepped and planar 1 × 1 stoichiometric (100) surfaces by thermal annealing, a 1 × 3 ordered defect array being formed. The interaction of H2O with TiO2(100) at 130 K and 293 K is found to be independent of O vacancy and step density. H2O adsorbs molecularly at 130 K and dissociates to form OH at 293 K.",

author = "Muryn, {C. A.} and Hardman, {P. J.} and Crouch, {J. J.} and Raiker, {G. N.} and G. Thornton and Law, {D. S.L.}",

note = "Funding Information: We are grateful to R.L. Kurtz and R. Diehl for useful discussions. This work was funded by the Science and Engineering Research Council (UK), including the award of studentships to C.A.M. and P.J.H.",

year = "1991",

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doi = "10.1016/0039-6028(91)91091-B",

language = "English",

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T1 - Step and point defect effects on TiO2(100) reactivity

AU - Muryn, C. A.

AU - Hardman, P. J.

AU - Crouch, J. J.

AU - Raiker, G. N.

AU - Thornton, G.

AU - Law, D. S.L.

N1 - Funding Information: We are grateful to R.L. Kurtz and R. Diehl for useful discussions. This work was funded by the Science and Engineering Research Council (UK), including the award of studentships to C.A.M. and P.J.H.

PY - 1991/7/1

Y1 - 1991/7/1

N2 - The influence of steps and point defects on the reactivity of TiO2(100) to H2O has been examined using photoemission spectroscopy. A vicinal surface was prepared by polishing a sample 2.6 ± 0.1° off the (100) plane towards [001]. Point defects in the form of oxygen vacancies were introduced onto the stepped and planar 1 × 1 stoichiometric (100) surfaces by thermal annealing, a 1 × 3 ordered defect array being formed. The interaction of H2O with TiO2(100) at 130 K and 293 K is found to be independent of O vacancy and step density. H2O adsorbs molecularly at 130 K and dissociates to form OH at 293 K.

AB - The influence of steps and point defects on the reactivity of TiO2(100) to H2O has been examined using photoemission spectroscopy. A vicinal surface was prepared by polishing a sample 2.6 ± 0.1° off the (100) plane towards [001]. Point defects in the form of oxygen vacancies were introduced onto the stepped and planar 1 × 1 stoichiometric (100) surfaces by thermal annealing, a 1 × 3 ordered defect array being formed. The interaction of H2O with TiO2(100) at 130 K and 293 K is found to be independent of O vacancy and step density. H2O adsorbs molecularly at 130 K and dissociates to form OH at 293 K.

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U2 - 10.1016/0039-6028(91)91091-B

DO - 10.1016/0039-6028(91)91091-B

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VL - 251-252

SP - 747

EP - 752

JO - Surface Science

JF - Surface Science

IS - C

ER -

Step and point defect effects on TiO₂(100) reactivity

Abstract

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