scholarly journals Cover Picture: Local Reaction Kinetics by Imaging: CO Oxidation on Polycrystalline Platinum (ChemPhysChem 15/2010)

ChemPhysChem ◽  
2010 ◽  
Vol 11 (15) ◽  
pp. 3185-3185
Author(s):  
Yuri Suchorski ◽  
Christian Spiel ◽  
Diana Vogel ◽  
Wolfgang Drachsel ◽  
Robert Schlögl ◽  
...  
Keyword(s):  
Co Oxidation ◽  
Reaction Kinetics ◽  
Local Reaction ◽  
Polycrystalline Platinum

Local Reaction Kinetics by Imaging: CO Oxidation on Polycrystalline Platinum

ChemPhysChem ◽  
2010 ◽  
Vol 11 (15) ◽  
pp. 3231-3235 ◽  
Author(s):  
Yuri Suchorski ◽  
Christian Spiel ◽  
Diana Vogel ◽  
Wolfgang Drachsel ◽  
Robert Schlögl ◽  
...  
Keyword(s):  
Co Oxidation ◽  
Reaction Kinetics ◽  
Local Reaction ◽  
Polycrystalline Platinum

scholarly journals The Role of Defects in the Local Reaction Kinetics of CO Oxidation on Low-Index Pd Surfaces

2013 ◽  
Vol 117 (23) ◽  
pp. 12054-12060 ◽  
Author(s):  
D. Vogel ◽  
C. Spiel ◽  
M. Schmid ◽  
M. Stöger-Pollach ◽  
R. Schlögl ◽  
...  
Keyword(s):  
Co Oxidation ◽  
Reaction Kinetics ◽  
Local Reaction ◽  
Kinetics Of

scholarly journals Catalysis by Imaging: From Meso- to Nano-scale

2020 ◽  
Vol 63 (15-18) ◽  
pp. 1532-1544 ◽  
Author(s):  
Yuri Suchorski ◽  
Günther Rupprechter
Keyword(s):  
Co Oxidation ◽  
Reaction Kinetics ◽  
Surface Structure ◽  
Local Reaction ◽  
Model Systems ◽  
Image Intensity ◽  
Nano Scale ◽  
Kinetic Transitions ◽  
Local Image

AbstractIn-situ imaging of catalytic reactions has provided insights into reaction front propagation, pattern formation and other spatio-temporal effects for decades. Most recently, analysis of the local image intensity opened a way towards evaluation of local reaction kinetics. Herein, our recent studies of catalytic CO oxidation on Pt(hkl) and Rh(hkl) via the kinetics by imaging approach, both on the meso- and nano-scale, are reviewed. Polycrystalline Pt and Rh foils and nanotips were used as µm- and nm-sized surface structure libraries as model systems for reactions in the 10–5–10–6 mbar pressure range. Isobaric light-off and isothermal kinetic transitions were visualized in-situ at µm-resolution by photoemission electron microscopy (PEEM), and at nm-resolution by field emission microscopy (FEM) and field ion microscopy (FIM). The local reaction kinetics of individual Pt(hkl) and Rh(hkl) domains and nanofacets of Pt and Rh nanotips were deduced from the local image intensity analysis. This revealed the structure-sensitivity of CO oxidation, both in the light-off and in the kinetic bistability: for different low-index Pt surfaces, differences of up to 60 K in the critical light-off temperatures and remarkable differences in the bistability ranges of differently oriented stepped Rh surfaces were observed. To prove the spatial coherence of light-off on nanotips, proper orthogonal decomposition (POD) as a spatial correlation analysis was applied to the FIM video-data. The influence of particular configurations of steps and kinks on kinetic transitions were analysed by using the average nearest neighbour number as a common descriptor. Perspectives of nanosized surface structure libraries for future model studies are discussed.

Catalytic CO Oxidation on Individual (110) Domains of a Polycrystalline Pt Foil: Local Reaction Kinetics by PEEM

2011 ◽  
Vol 141 (5) ◽  
pp. 625-632 ◽  
Author(s):  
Ch. Spiel ◽  
D. Vogel ◽  
Y. Suchorski ◽  
W. Drachsel ◽  
R. Schlögl ◽  
...  
Keyword(s):  
Co Oxidation ◽  
Reaction Kinetics ◽  
Local Reaction ◽  
Catalytic Co Oxidation

scholarly journals Mapping the local reaction kinetics by PEEM: CO oxidation on individual (100)-type grains of Pt foil

2011 ◽  
Vol 605 (23-24) ◽  
pp. 1999-2005 ◽  
Author(s):  
D. Vogel ◽  
C. Spiel ◽  
Y. Suchorski ◽  
A. Urich ◽  
R. Schlögl ◽  
...  
Keyword(s):  
Co Oxidation ◽  
Reaction Kinetics ◽  
Local Reaction

CO oxidation trends on Pt-group metals from ultrahigh vacuum to near atmospheric pressures: A combined in situ PM-IRAS and reaction kinetics study

2009 ◽  
Vol 603 (1) ◽  
pp. 65-70 ◽  
Author(s):  
F. Gao ◽  
S.M. McClure ◽  
Y. Cai ◽  
K.K. Gath ◽  
Y. Wang ◽  
...  
Keyword(s):  
Co Oxidation ◽  
Reaction Kinetics ◽  
Ultrahigh Vacuum ◽  
Kinetics Study

Steady-state reaction kinetics of CO oxidation catalyzed by uni-sized Pt30 clusters directly bound to Si surface

2016 ◽  
Vol 6 (18) ◽  
pp. 6910-6915 ◽  
Author(s):  
H. Yasumatsu ◽  
N. Fukui
Keyword(s):  
Steady State ◽  
Low Temperature ◽  
Co Oxidation ◽  
Reaction Kinetics ◽  
Co Poisoning ◽  
Si Substrate ◽  
Catalytic Co Oxidation ◽  
Kinetics Of

Catalytic CO oxidation driven by uni-sized Pt30 bound to a Si substrate, at the interface of which electrons are accumulated. The low-temperature and anti-CO-poisoning performance has been evidenced with continuous and simultaneous supply of CO and O2.

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