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

Paper ID Volume ID Publish Year Pages File Format Full-Text
53357 46964 2016 7 PDF Available
Title
In-situ surface analysis of AuPd(1 1 0) under elevated pressure of CO
Abstract

•We studied the surface properties of AuPd(1 1 0) under elevated pressure of CO.•Under elevated pressure of CO, nano-sized rice-grains forms on AuPd(1 1 0) surface.•New adsorption sites of CO are found with the analysis of PM-IRRAS and AP-XPS.

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], [2], [3], [4], [5], [6], [7], [8], [9] and [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.

Graphical abstractSTM images showing surface restructuring due to high CO pressure.Figure optionsDownload full-size imageDownload high-quality image (363 K)Download as PowerPoint slide

Keywords
AP-XPS; AuPd alloys; STM; Catalysis
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In-situ surface analysis of AuPd(1 1 0) under elevated pressure of CO
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Publisher
Database: Elsevier - ScienceDirect
Journal: Catalysis Today - Volume 260, 1 February 2016, Pages 39–45
Authors
, , , , , , , , , , ,
Subjects
Physical Sciences and Engineering Chemical Engineering Catalysis
Get Full-Text Now
Don't Miss Today's Special Offer
Price was $35.95
You save - $31
Price after discount Only $4.95
100% Money Back Guarantee
Full-text PDF Download
Online Support
Any Questions? feel free to contact us