In Situ Photoemission Observation of Catalytic CO Oxidation Reaction on Pd(110) under Near-Ambient Pressure Conditions: Evidence for the Langmuir–Hinshelwood Mechanism

2013 ◽  
Vol 117 (40) ◽  
pp. 20617-20624 ◽  
Author(s):  
Ryo Toyoshima ◽  
Masaaki Yoshida ◽  
Yuji Monya ◽  
Kazuma Suzuki ◽  
Kenta Amemiya ◽  
...  
Keyword(s):  
Co Oxidation ◽  
Oxidation Reaction ◽  
Ambient Pressure ◽  
Catalytic Co Oxidation ◽  
Co Oxidation Reaction ◽  
Langmuir Hinshelwood Mechanism

A near-ambient-pressure XPS study on catalytic CO oxidation reaction over a Ru(101¯0) surface

2014 ◽  
Vol 621 ◽  
pp. 128-132 ◽  
Author(s):  
Ryo Toyoshima ◽  
Masahiro Shimura ◽  
Masaaki Yoshida ◽  
Yuji Monya ◽  
Kazuma Suzuki ◽  
...  
Keyword(s):  
Co Oxidation ◽  
Oxidation Reaction ◽  
Ambient Pressure ◽  
Catalytic Co Oxidation ◽  
Co Oxidation Reaction ◽  
Ambient Pressure Xps ◽  
Xps Study ◽  
Near Ambient Pressure Xps

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

2012 ◽  
Vol 116 (35) ◽  
pp. 18691-18697 ◽  
Author(s):  
Ryo Toyoshima ◽  
Masaaki Yoshida ◽  
Yuji Monya ◽  
Yuka Kousa ◽  
Kazuma Suzuki ◽  
...  
Keyword(s):  
Co Oxidation ◽  
Oxidation Reaction ◽  
Ambient Pressure ◽  
Co Oxidation Reaction ◽  
Ambient Pressure Xps ◽  
Xps Study

scholarly journals CO Oxidation on Stepped Rh Surfaces: μm-Scale Versus Nanoscale

2019 ◽  
Vol 150 (3) ◽  
pp. 605-612 ◽  
Author(s):  
Y. Suchorski ◽  
I. Bespalov ◽  
J. Zeininger ◽  
M. Raab ◽  
M. Datler ◽  
...  
Keyword(s):  
Co Oxidation ◽  
Oxidation Reaction ◽  
Active Surface ◽  
Reaction Conditions ◽  
Miller Index ◽  
Co Oxidation Reaction ◽  
Catalytically Active ◽  
Field Emission Microscopy ◽  
Photoemission Electron

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

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

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

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

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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