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 › peer-review

12 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

Keywords

AP-XPS
AuPd alloys
Catalysis
STM

ASJC Scopus subject areas

Catalysis
Chemistry(all)

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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.",

keywords = "AP-XPS, AuPd alloys, Catalysis, STM",

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

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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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