NSR catalysis studied using scanning tunnelling microscopy

Michael Bowker; Marco Cristofolini; Matt Hall; Elodie Fourre; Federico Grillo; Elin McCormack; Peter Stone; Masaru Ishii

doi:10.1007/s11244-007-0202-2

NSR catalysis studied using scanning tunnelling microscopy

Michael Bowker^*, Marco Cristofolini, Matt Hall, Elodie Fourre, Federico Grillo, Elin McCormack, Peter Stone, Masaru Ishii

^*Corresponding author for this work

School of Chemistry

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

20 Citations (Scopus)

Abstract

In this paper we report the fabrication of model catalysts prepared to understand the structure of the BaO surface. This utilises the 'inverse' catalyst method, that is, the oxide layer is fabricated onto the top of a metal single crystal surface. We show that we can atomically resolve the surface structure of BaO(111) and that it presents a (2x2) reconstruction at its surface. Under other dosing conditions we can produce a layer which is metastable at 573K, which we believe to be the peroxide, BaO2. We have shown that the BaO layer can store NOx from a mix of NO and oxygen, even under the extremely low exposure conditions of UHV, proving that the NOx storage process is a facile one. The results indicate that it is not necessary to have NO2 in the gas phase in order to store NOx.

Original language	English
Pages (from-to)	341-343
Number of pages	3
Journal	Topics in Catalysis
Volume	42-43
Issue number	1-4
DOIs	https://doi.org/10.1007/s11244-007-0202-2
Publication status	Published - May 2007
Event	7th Congress on Catalysis and Automotive Pollution Control - Brussels, Belgium Duration: 30 Aug 2006 → …

Keywords

NSR
NOx storage and reduction
SCR
STM
model catalysts
BaO model catalysts
NOX STORAGE
REDUCTION
ADSORPTION
PT(111)
BAO

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10.1007/s11244-007-0202-2

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title = "NSR catalysis studied using scanning tunnelling microscopy",

abstract = "In this paper we report the fabrication of model catalysts prepared to understand the structure of the BaO surface. This utilises the 'inverse' catalyst method, that is, the oxide layer is fabricated onto the top of a metal single crystal surface. We show that we can atomically resolve the surface structure of BaO(111) and that it presents a (2x2) reconstruction at its surface. Under other dosing conditions we can produce a layer which is metastable at 573K, which we believe to be the peroxide, BaO2. We have shown that the BaO layer can store NOx from a mix of NO and oxygen, even under the extremely low exposure conditions of UHV, proving that the NOx storage process is a facile one. The results indicate that it is not necessary to have NO2 in the gas phase in order to store NOx.",

keywords = "NSR, NOx storage and reduction, SCR, STM, model catalysts, BaO model catalysts, NOX STORAGE, REDUCTION, ADSORPTION, PT(111), BAO",

author = "Michael Bowker and Marco Cristofolini and Matt Hall and Elodie Fourre and Federico Grillo and Elin McCormack and Peter Stone and Masaru Ishii",

year = "2007",

month = may,

doi = "10.1007/s11244-007-0202-2",

language = "English",

volume = "42-43",

pages = "341--343",

journal = "Topics in Catalysis",

issn = "1022-5528",

publisher = "Springer",

number = "1-4",

note = "7th Congress on Catalysis and Automotive Pollution Control ; Conference date: 30-08-2006",

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TY - JOUR

T1 - NSR catalysis studied using scanning tunnelling microscopy

AU - Bowker, Michael

AU - Cristofolini, Marco

AU - Hall, Matt

AU - Fourre, Elodie

AU - Grillo, Federico

AU - McCormack, Elin

AU - Stone, Peter

AU - Ishii, Masaru

PY - 2007/5

Y1 - 2007/5

N2 - In this paper we report the fabrication of model catalysts prepared to understand the structure of the BaO surface. This utilises the 'inverse' catalyst method, that is, the oxide layer is fabricated onto the top of a metal single crystal surface. We show that we can atomically resolve the surface structure of BaO(111) and that it presents a (2x2) reconstruction at its surface. Under other dosing conditions we can produce a layer which is metastable at 573K, which we believe to be the peroxide, BaO2. We have shown that the BaO layer can store NOx from a mix of NO and oxygen, even under the extremely low exposure conditions of UHV, proving that the NOx storage process is a facile one. The results indicate that it is not necessary to have NO2 in the gas phase in order to store NOx.

AB - In this paper we report the fabrication of model catalysts prepared to understand the structure of the BaO surface. This utilises the 'inverse' catalyst method, that is, the oxide layer is fabricated onto the top of a metal single crystal surface. We show that we can atomically resolve the surface structure of BaO(111) and that it presents a (2x2) reconstruction at its surface. Under other dosing conditions we can produce a layer which is metastable at 573K, which we believe to be the peroxide, BaO2. We have shown that the BaO layer can store NOx from a mix of NO and oxygen, even under the extremely low exposure conditions of UHV, proving that the NOx storage process is a facile one. The results indicate that it is not necessary to have NO2 in the gas phase in order to store NOx.

KW - NSR

KW - NOx storage and reduction

KW - SCR

KW - STM

KW - model catalysts

KW - BaO model catalysts

KW - NOX STORAGE

KW - REDUCTION

KW - ADSORPTION

KW - PT(111)

KW - BAO

U2 - 10.1007/s11244-007-0202-2

DO - 10.1007/s11244-007-0202-2

M3 - Article

SN - 1022-5528

VL - 42-43

SP - 341

EP - 343

JO - Topics in Catalysis

JF - Topics in Catalysis

IS - 1-4

T2 - 7th Congress on Catalysis and Automotive Pollution Control

Y2 - 30 August 2006

ER -

NSR catalysis studied using scanning tunnelling microscopy

Abstract

Keywords

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