scholarly journals Potassium-Promoted Iron Oxide Model Catalyst Films for the Dehydrogenation of Ethylbenzene: An Example for Complex Model Systems

2002 ◽  
Vol 212 (1) ◽  
pp. 104-111 ◽  
Author(s):  
Guido Ketteler ◽  
Wolfgang Ranke ◽  
Robert Schlögl
Keyword(s):  
Iron Oxide ◽  
Complex Model ◽  
Model Catalyst ◽  
Model Systems ◽  
Dehydrogenation Of Ethylbenzene

Adsorption and dehydrogenation of ethylbenzene on ultrathin iron oxide model catalyst films

1997 ◽  
Vol 382 (1-3) ◽  
pp. 326-335 ◽  
Author(s):  
D. Zscherpel ◽  
W. Weiss ◽  
R. Schlögl
Keyword(s):  
Iron Oxide ◽  
Model Catalyst ◽  
Dehydrogenation Of Ethylbenzene

scholarly journals Inverse single-site Fe1(OH)X/Pt(111) model catalyst for preferential oxidation of CO in H2

Nano Research ◽  
2021 ◽  
Author(s):  
Chunlei Wang ◽  
Heloise Tissot ◽  
Markus Soldemo ◽  
Junling Lu ◽  
Jonas Weissenrieder
Keyword(s):  
Iron Oxide ◽  
Iron Oxide Nanoparticles ◽  
Redox Properties ◽  
Model Catalyst ◽  
Single Site ◽  
Oxide Nanoparticles ◽  
Preferential Oxidation ◽  
Oxidation Of Co ◽  
Reaction Conditions ◽  
Preferential Oxidation Of Co

AbstractInverse oxide/metal model systems are frequently used to investigate catalytic structure-function relationships at an atomic level. By means of a novel atomic layer deposition process, growth of single-site Fe1Ox on a Pt(111) single crystal surface was achieved, as confirmed by scanning tunneling microscopy (STM). The redox properties of the catalyst were characterized by synchrotron radiation based ambient pressure X-ray photoelectron spectroscopy (AP-XPS). After calcination treatment at 373 K in 1 mbar O2 the chemical state of the catalyst was determined as Fe3+. Reduction in 1 mbar H2 at 373 K demonstrates a facile reduction to Fe2+ and complete hydroxylation at significantly lower temperatures than what has been reported for iron oxide nanoparticles. At reaction conditions relevant for preferential oxidation of CO in H2 (PROX), the catalyst exhibits a Fe3+ state (ferric hydroxide) at 298 K while re-oxidation of iron oxide clusters does not occur under the same condition. CO oxidation proceeds on the single-site Fe1(OH)3 through a mechanism including the loss of hydroxyl groups in the temperature range of 373 to 473 K, but no reaction is observed on iron oxide clusters. The results highlight the high flexibility of the single iron atom catalyst in switching oxidation states, not observed for iron oxide nanoparticles under similar reaction conditions, which may indicate a higher intrinsic activity of such single interfacial sites than the conventional metal-oxide interfaces. In summary, our findings of the redox properties on inverse single-site iron oxide model catalyst may provide new insights into applied Fe-Pt catalysis.

scholarly journals Health Dynamics Through Psychometric Networks in Gynecology, Obstetrics, Reproductive Health And COVID-19 Research

2021 ◽  
Vol 5 (2) ◽  
Keyword(s):  
Network Analysis ◽  
Maternal Health ◽  
Reproductive Health ◽  
Clinical Importance ◽  
Complex Model ◽  
Model Systems ◽  
Health Conditions ◽  
Clinical Population ◽  
Concomitant Variables ◽  
Health Dynamics

Network analysis offers a valuable methodological and practical contribution to research in gynecology, obstetrics and reproductive health. This analysis enables clinicians to interpret and translate the information derived from their research into better integrated care in the clinical population of interest, allowing them to focus a concrete intervention based on network results, from the perspective of complex model systems. The evaluation of the network reinforces a better explanation of the functioning of various reproductive and maternal health conditions to explain how their etiological mechanisms and concomitant variables interact with each other, of major clinical importance in the current COVID-19 pandemic context.

Microwave-assisted catalytic oxidative dehydrogenation of ethylbenzene on iron oxide loaded carbon nanotubes

Carbon ◽  
2008 ◽  
Vol 46 (13) ◽  
pp. 1678-1686 ◽  
Author(s):  
B. Nigrovski ◽  
U. Zavyalova ◽  
P. Scholz ◽  
K. Pollok ◽  
M. Müller ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Iron Oxide ◽  
Oxidative Dehydrogenation ◽  
Microwave Assisted ◽  
Dehydrogenation Of Ethylbenzene ◽  
Oxidative Dehydrogenation Of Ethylbenzene

Structural and catalytic studies of promoted iron oxide catalysts used in the dehydrogenation of ethylbenzene to styrene

1985 ◽  
Vol 95 (3) ◽  
pp. 285-290
Author(s):  
B A Sayyed ◽  
M P Gupta ◽  
S K Date ◽  
K R Kamble ◽  
A Y Sonsale ◽  
...  
Keyword(s):  
Iron Oxide ◽  
Oxide Catalysts ◽  
Dehydrogenation Of Ethylbenzene

scholarly journals Magnetotactic Bacteria and Honey Bees: Model Systems for Characterising an Iron Oxide Mediated Magnetoreceptor

2015 ◽  
Vol 21 (S3) ◽  
pp. 85-86
Author(s):  
Jeremy Shaw ◽  
Alastair Boyd ◽  
Michael House ◽  
Martin Saunders ◽  
Falko Mathes ◽  
...  
Keyword(s):  
Iron Oxide ◽  
Honey Bees ◽  
Magnetotactic Bacteria ◽  
Model Systems
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