In-situ surface analysis of AuPd(1 1 0) under elevated pressure of CO

M. A. Languille; E. Ehret; H. C. Lee; C. K. Jeong; Ryo Toyoshima; Hiroshi Kondoh; K. Mase; Y. Jugnet; J. C. Bertolini; F. J Cadete Santos Aires; B. S. Mun

doi:10.1016/j.cattod.2015.05.029

In-situ surface analysis of AuPd(1 1 0) under elevated pressure of CO

M. A. Languille, E. Ehret, H. C. Lee, C. K. Jeong, Ryo Toyoshima, Hiroshi Kondoh, K. Mase, Y. Jugnet, J. C. Bertolini, F. J Cadete Santos Aires, B. S. Mun

Department of Chemistry

Research output: Contribution to journal › Article

10 Citations (Scopus)

Abstract

With the combination of various in-situ surface science tools, surface chemical and structural properties of bimetallic AuPd(1 1 0) alloys are characterized under elevated CO pressure. Under 1 Torr of CO gas pressure, STM images show the formation of nano-sized surface rice-grains along the index direction of [1-10] while PM-IRRAS shows new CO vibrational band. This new vibrational band of PM-IRRAS is confirmed as the CO molecules attached to atop site of Pd with the results of ambient pressure XPS. In the case of adsorption of CO on AuPd(1 1 0) alloys, the so-called "pressure gap" exists and the surface morphology and its chemical states change at elevated pressure conditions.

Original language	English
Pages (from-to)	39-45
Number of pages	7
Journal	Catalysis Today
Volume	260
DOIs	https://doi.org/10.1016/j.cattod.2015.05.029
Publication status	Published - 2016 Feb 1

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Keywords

AP-XPS
AuPd alloys
Catalysis
STM

ASJC Scopus subject areas

Catalysis
Chemistry(all)

Cite this

Languille, M. A., Ehret, E., Lee, H. C., Jeong, C. K., Toyoshima, R., Kondoh, H., Mase, K., Jugnet, Y., Bertolini, J. C., Aires, F. J. C. S., & Mun, B. S. (2016). In-situ surface analysis of AuPd(1 1 0) under elevated pressure of CO. Catalysis Today, 260, 39-45. https://doi.org/10.1016/j.cattod.2015.05.029

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title = "In-situ surface analysis of AuPd(1 1 0) under elevated pressure of CO",

abstract = "With the combination of various in-situ surface science tools, surface chemical and structural properties of bimetallic AuPd(1 1 0) alloys are characterized under elevated CO pressure. Under 1 Torr of CO gas pressure, STM images show the formation of nano-sized surface rice-grains along the index direction of [1-10] while PM-IRRAS shows new CO vibrational band. This new vibrational band of PM-IRRAS is confirmed as the CO molecules attached to atop site of Pd with the results of ambient pressure XPS. In the case of adsorption of CO on AuPd(1 1 0) alloys, the so-called {"}pressure gap{"} exists and the surface morphology and its chemical states change at elevated pressure conditions.",

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AU - Languille, M. A.

AU - Ehret, E.

AU - Lee, H. C.

AU - Jeong, C. K.

AU - Toyoshima, Ryo

AU - Kondoh, Hiroshi

AU - Mase, K.

AU - Jugnet, Y.

AU - Bertolini, J. C.

AU - Aires, F. J Cadete Santos

AU - Mun, B. S.

PY - 2016/2/1

Y1 - 2016/2/1

N2 - With the combination of various in-situ surface science tools, surface chemical and structural properties of bimetallic AuPd(1 1 0) alloys are characterized under elevated CO pressure. Under 1 Torr of CO gas pressure, STM images show the formation of nano-sized surface rice-grains along the index direction of [1-10] while PM-IRRAS shows new CO vibrational band. This new vibrational band of PM-IRRAS is confirmed as the CO molecules attached to atop site of Pd with the results of ambient pressure XPS. In the case of adsorption of CO on AuPd(1 1 0) alloys, the so-called "pressure gap" exists and the surface morphology and its chemical states change at elevated pressure conditions.

AB - With the combination of various in-situ surface science tools, surface chemical and structural properties of bimetallic AuPd(1 1 0) alloys are characterized under elevated CO pressure. Under 1 Torr of CO gas pressure, STM images show the formation of nano-sized surface rice-grains along the index direction of [1-10] while PM-IRRAS shows new CO vibrational band. This new vibrational band of PM-IRRAS is confirmed as the CO molecules attached to atop site of Pd with the results of ambient pressure XPS. In the case of adsorption of CO on AuPd(1 1 0) alloys, the so-called "pressure gap" exists and the surface morphology and its chemical states change at elevated pressure conditions.

KW - AP-XPS

KW - AuPd alloys

KW - Catalysis

KW - STM

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10.1016/j.cattod.2015.05.029