2012
DOI: 10.1021/jz301802g
|View full text |Cite
|
Sign up to set email alerts
|

Promoter Effect of Early Stage Grown Surface Oxides: A Near-Ambient-Pressure XPS Study of CO Oxidation on PtSn Bimetallics

Abstract: The knowledge of the catalyst active phase on the atomic scale under realistic working conditions is the key for designing new and more efficient materials. In this context, the investigation of CO oxidation on the bimetallic Pt3Sn(111) surfaces by near-ambient-pressure X-ray photoelectron spectroscopy and density functional theory calculations illustrates how combining advanced methodologies allows the determination of the nature of the active phase. Starting from 300 K and 500 mTorr of oxygen, the progressiv… Show more

Help me understand this report

Search citation statements

Order By: Relevance

Paper Sections

Select...
3
1
1

Citation Types

6
41
0

Year Published

2014
2014
2024
2024

Publication Types

Select...
7
1

Relationship

0
8

Authors

Journals

citations
Cited by 45 publications
(47 citation statements)
references
References 41 publications
6
41
0
Order By: Relevance
“…Tin has been reported in the literature as a promoter of CO oxidation to CO 2 in PtSn based catalysts . This effect is ascribed to labile oxygen species lateral diffusion.…”
Section: Introductionmentioning
confidence: 94%
“…Tin has been reported in the literature as a promoter of CO oxidation to CO 2 in PtSn based catalysts . This effect is ascribed to labile oxygen species lateral diffusion.…”
Section: Introductionmentioning
confidence: 94%
“…This method cannot provide absolute core level binding energies; only shifts of the core electron binding energy are relevant. 46,47 Experimental Results.…”
Section: Computational Detailsmentioning
confidence: 99%
“…The degree of segregation is determined by the reaction conditions and can experimentally be monitored by, for example, following the Sn 3d core level binding energies with XPS 6,19,20 or the CO stretch vibration with IR spectroscopy. [4][5][6][7][20][21][22] Recently, these methods were used to monitor SnO X formation upon exposure of CO to PtSn nanoparticles. 19 The conclusion was based on the comparison of Sn 3d and C 1s XPS peaks after reduction in H 2 at 723 K and after 90 min CO exposure (2% CO/He) at 498 K. In addition to the formation of SnO X , the formation of C-C bonds was detected.…”
Section: Introductionmentioning
confidence: 99%