In Situ Ambient Pressure XPS Study of CO Oxidation Reaction on Pd(111) Surfaces

Abstract The catalytic CO oxidation reaction on stepped Rh surfaces in the 10−6 mbar pressure range was studied in situ on individual μm-sized high-Miller-index domains of a polycrystalline Rh foil and on nm-sized facets of a Rh tip, employing photoemission electron microscopy (PEEM) and field-ion/field-emission microscopy (FIM/FEM), respectively. Such approach permits a direct comparison of the reaction kinetics for crystallographically different regions under identical reaction conditions. The catalytic activity of the different Rh surfaces, particularly their tolerance towards poisoning by CO, was found to be strongly dependent on the density of steps and defects, as well as on the size (µm vs. nm) of the respective catalytically active surface. Graphic Abstract

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In-situ FT-IRAS study of the CO oxidation reaction over Ru(001)

Surface Science Letters ◽

10.1016/0167-2584(91)90376-3 ◽

1991 ◽

Vol 253 (1-3) ◽

pp. A443

Author(s):

F.M. Hoffmann ◽

M.D. Weisel ◽

C.H.F. Peden

Keyword(s):

Co Oxidation ◽

Oxidation Reaction ◽

Co Oxidation Reaction

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

The Journal of Physical Chemistry Letters ◽

10.1021/jz301802g ◽

2012 ◽

Vol 3 (24) ◽

pp. 3707-3714 ◽

Cited By ~ 27

Author(s):

Yvette Jugnet ◽

David Loffreda ◽

Céline Dupont ◽

Françoise Delbecq ◽

Eric Ehret ◽

...

Keyword(s):

Co Oxidation ◽

Early Stage ◽

Ambient Pressure ◽

Promoter Effect ◽

Ambient Pressure Xps ◽

Surface Oxides ◽

Xps Study ◽

Near Ambient Pressure Xps

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In situ analysis of catalytically active Pd surfaces for CO oxidation with near ambient pressure XPS

Catalysis Today ◽

10.1016/j.cattod.2015.05.016 ◽

2016 ◽

Vol 260 ◽

pp. 14-20 ◽

Cited By ~ 27

Author(s):

Hiroshi Kondoh ◽

Ryo Toyoshima ◽

Yuji Monya ◽

Masaaki Yoshida ◽

Kazuhiko Mase ◽

...

Keyword(s):

Co Oxidation ◽

Ambient Pressure ◽

In Situ Analysis ◽

Ambient Pressure Xps ◽

Catalytically Active ◽

Near Ambient Pressure Xps

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Catalyst Chemical State during CO Oxidation Reaction on Cu(111) Studied with Ambient-Pressure X-ray Photoelectron Spectroscopy and Near Edge X-ray Adsorption Fine Structure Spectroscopy

Journal of the American Chemical Society ◽

10.1021/jacs.5b07451 ◽

2015 ◽

Vol 137 (34) ◽

pp. 11186-11190 ◽

Cited By ~ 91

Author(s):

Baran Eren ◽

Christian Heine ◽

Hendrik Bluhm ◽

Gabor A. Somorjai ◽

Miquel Salmeron

Keyword(s):

Fine Structure ◽

Co Oxidation ◽

Photoelectron Spectroscopy ◽

Oxidation Reaction ◽

Ambient Pressure ◽

Chemical State ◽

X Ray ◽

Co Oxidation Reaction

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In-situ characterization by Near-Ambient Pressure XPS of the catalytically active phase of Pt/Al2O3 during NO and CO oxidation

Applied Catalysis B Environmental ◽

10.1016/j.apcatb.2017.08.047 ◽

2018 ◽

Vol 220 ◽

pp. 506-511 ◽

Cited By ~ 18

Author(s):

Susanna L. Bergman ◽

Jonas Granestrand ◽

Yu Tang ◽

Rodrigo Suárez París ◽

Marita Nilsson ◽

...

Keyword(s):

Co Oxidation ◽

Ambient Pressure ◽

Active Phase ◽

In Situ Characterization ◽

Ambient Pressure Xps ◽

Catalytically Active ◽

Catalytically Active Phase ◽

Near Ambient Pressure Xps

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Stroboscopic operando spectroscopy of the dynamics in heterogeneous catalysis by event-averaging

10.21203/rs.3.rs-136815/v1 ◽

2021 ◽

Author(s):

Jan Knudsen ◽

Tamires Gallo ◽

Virgínia Boix ◽

Marie Strømsheim ◽

Giulio D'Acunto ◽

...

Keyword(s):

Co Oxidation ◽

Photoelectron Spectroscopy ◽

Oxidation Reaction ◽

Ambient Pressure ◽

Reaction Conditions ◽

Catalyst Structure ◽

Time Resolved ◽

Co Oxidation Reaction ◽

Surface Phases ◽

Gas Environment

Abstract Heterogeneous catalyst surfaces are highly dynamic entities that respond rapidly to changes in their local gas environment, and the dynamics of the response is a decisive factor for the catalysts’ action and activity. Few probes are able to map catalyst structure and local gas environment simultaneously under reaction conditions at the time scales of the dynamic changes. Here we use the CO oxidation reaction over a Pd(100) surface exposed to pressures of 3 and 100 mbar of a CO + O2 gas mixture to demonstrate how such studies can be performed by time-resolved ambient pressure photoelectron spectroscopy. Central elements of the method are cyclic gas pulsing and software-based event-averaging by image recognition of spectral features. For the CO oxidation reaction over Pd(100) our main finding is that that all surface phases – the CO-covered Pd surface, a surface oxide and a thick PdOx phase – catalyse the CO oxidation reaction, in dependence on the supply of gas phase reactants.

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