Structures and Reactivities of Tin Oxide on Pt(111) Studied by Ambient Pressure X-ray Photoelectron Spectroscopy (APXPS)

Laura Y. Kraya; Guangzhi F. Liu; Xiaobo He; Bruce E. Koel

doi:10.1007/s11244-015-0522-6

Structures and Reactivities of Tin Oxide on Pt(111) Studied by Ambient Pressure X-ray Photoelectron Spectroscopy (APXPS)

Laura Y. Kraya, Guangzhi F. Liu, Xiaobo He, Bruce E. Koel

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

3 Scopus citations

Abstract

The reduction of disordered and ordered tin oxide monolayers and multilayers on Pt(111) by H₂ was studied in situ by ambient pressure X-ray photoelectron spectroscopy. The disordered tin oxide monolayer was highly reactive and reduced by 5.5 × 10^-7 Torr H₂ at 295 K. However, the ordered monolayer was much less reactive, and nearly inert even in 2.2 Torr H₂ at 295 K. Reduction of the tin oxide monolayer occurred only when the sample temperature increased to above 600 K in 5.5 × 10^-7 Torr H₂ or when the sample temperature was 450 K in 2.2 Torr H₂. Disordered and ordered multilayers were found to be much less reactive by comparison to the disordered monolayer film. The reduction activity of these ordered and disordered Sn oxide films varied dramatically (by a factor of 10⁷), demonstrating the structural flexibility of Sn oxides and the key interplay of structure and reactivity.

Original language	English (US)
Pages (from-to)	497-505
Number of pages	9
Journal	Topics in Catalysis
Volume	59
Issue number	5-7
DOIs	https://doi.org/10.1007/s11244-015-0522-6
State	Published - Mar 1 2016

All Science Journal Classification (ASJC) codes

Catalysis
Chemistry(all)

Keywords

APXPS
Catalyst
Photoemission
Reduction
Tin Oxide

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title = "Structures and Reactivities of Tin Oxide on Pt(111) Studied by Ambient Pressure X-ray Photoelectron Spectroscopy (APXPS)",

abstract = "The reduction of disordered and ordered tin oxide monolayers and multilayers on Pt(111) by H2 was studied in situ by ambient pressure X-ray photoelectron spectroscopy. The disordered tin oxide monolayer was highly reactive and reduced by 5.5 × 10-7 Torr H2 at 295 K. However, the ordered monolayer was much less reactive, and nearly inert even in 2.2 Torr H2 at 295 K. Reduction of the tin oxide monolayer occurred only when the sample temperature increased to above 600 K in 5.5 × 10-7 Torr H2 or when the sample temperature was 450 K in 2.2 Torr H2. Disordered and ordered multilayers were found to be much less reactive by comparison to the disordered monolayer film. The reduction activity of these ordered and disordered Sn oxide films varied dramatically (by a factor of 107), demonstrating the structural flexibility of Sn oxides and the key interplay of structure and reactivity.",

keywords = "APXPS, Catalyst, Photoemission, Reduction, Tin Oxide",

author = "Kraya, {Laura Y.} and Liu, {Guangzhi F.} and Xiaobo He and Koel, {Bruce E.}",

note = "Funding Information: BEK acknowledges that this material is based upon work supported by the National Science Foundation under Grant No. CBET-1264737. The authors would like to acknowledge H. Bluhm at LBL National Lab for his contribution to the experimental section of this work. Publisher Copyright: {\textcopyright} 2016 Springer Science+Business Media New York.",

year = "2016",

month = mar,

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doi = "10.1007/s11244-015-0522-6",

language = "English (US)",

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T1 - Structures and Reactivities of Tin Oxide on Pt(111) Studied by Ambient Pressure X-ray Photoelectron Spectroscopy (APXPS)

AU - Kraya, Laura Y.

AU - Liu, Guangzhi F.

AU - He, Xiaobo

AU - Koel, Bruce E.

N1 - Funding Information: BEK acknowledges that this material is based upon work supported by the National Science Foundation under Grant No. CBET-1264737. The authors would like to acknowledge H. Bluhm at LBL National Lab for his contribution to the experimental section of this work. Publisher Copyright: © 2016 Springer Science+Business Media New York.

PY - 2016/3/1

Y1 - 2016/3/1

N2 - The reduction of disordered and ordered tin oxide monolayers and multilayers on Pt(111) by H2 was studied in situ by ambient pressure X-ray photoelectron spectroscopy. The disordered tin oxide monolayer was highly reactive and reduced by 5.5 × 10-7 Torr H2 at 295 K. However, the ordered monolayer was much less reactive, and nearly inert even in 2.2 Torr H2 at 295 K. Reduction of the tin oxide monolayer occurred only when the sample temperature increased to above 600 K in 5.5 × 10-7 Torr H2 or when the sample temperature was 450 K in 2.2 Torr H2. Disordered and ordered multilayers were found to be much less reactive by comparison to the disordered monolayer film. The reduction activity of these ordered and disordered Sn oxide films varied dramatically (by a factor of 107), demonstrating the structural flexibility of Sn oxides and the key interplay of structure and reactivity.

AB - The reduction of disordered and ordered tin oxide monolayers and multilayers on Pt(111) by H2 was studied in situ by ambient pressure X-ray photoelectron spectroscopy. The disordered tin oxide monolayer was highly reactive and reduced by 5.5 × 10-7 Torr H2 at 295 K. However, the ordered monolayer was much less reactive, and nearly inert even in 2.2 Torr H2 at 295 K. Reduction of the tin oxide monolayer occurred only when the sample temperature increased to above 600 K in 5.5 × 10-7 Torr H2 or when the sample temperature was 450 K in 2.2 Torr H2. Disordered and ordered multilayers were found to be much less reactive by comparison to the disordered monolayer film. The reduction activity of these ordered and disordered Sn oxide films varied dramatically (by a factor of 107), demonstrating the structural flexibility of Sn oxides and the key interplay of structure and reactivity.

KW - APXPS

KW - Catalyst

KW - Photoemission

KW - Reduction

KW - Tin Oxide

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ER -

Structures and Reactivities of Tin Oxide on Pt(111) Studied by Ambient Pressure X-ray Photoelectron Spectroscopy (APXPS)

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