Oxygen-exchange reactions during CO oxidation over titania- and alumina-supported Au nanoparticles

2006 ◽  
Vol 241 (2) ◽  
pp. 407-416 ◽  
Author(s):  
J CALLA ◽  
R DAVIS
Keyword(s):  
Co Oxidation ◽  
Au Nanoparticles ◽  
Oxygen Exchange ◽  
Exchange Reactions

Tracking oxygen atoms in electrochemical CO oxidation – Part I: Oxygen exchange via CO2 hydration

2021 ◽  
Vol 374 ◽  
pp. 137842
Author(s):  
Soren B. Scott ◽  
Jakob Kibsgaard ◽  
Peter C.K. Vesborg ◽  
Ib Chorkendorff
Keyword(s):  
Co Oxidation ◽  
Oxygen Exchange ◽  
Oxygen Atoms

Effect of electric fields on oxygen exchange reactions during sodium perchlorate thermolysis

2007 ◽  
Vol 413 (2) ◽  
pp. 81-83 ◽  
Author(s):  
S. M. Busurin ◽  
Yu. G. Morozov ◽  
M. V. Kuznetsov ◽  
M. L. Chernega
Keyword(s):  
Electric Fields ◽  
Sodium Perchlorate ◽  
Oxygen Exchange ◽  
Exchange Reactions

OXYGEN EXCHANGE REACTIONS OF BENZALDEHYDE AND SOME OTHER SUBSTANCES

1938 ◽  
Vol 2 (6) ◽  
pp. 569-573 ◽  
Author(s):  
MURRAY. SENKUS ◽  
WELDON G. BROWN
Keyword(s):  
Oxygen Exchange ◽  
Exchange Reactions ◽  
Other Substances

Catalytic CO Oxidation over Au Nanoparticles Supported on CeO2 Nanocrystals: Effect of the Au–CeO2 Interface

ACS Catalysis ◽  
2018 ◽  
Vol 8 (12) ◽  
pp. 11491-11501 ◽  
Author(s):  
Hyunwoo Ha ◽  
Sinmyung Yoon ◽  
Kwangjin An ◽  
Hyun You Kim
Keyword(s):  
Co Oxidation ◽  
Au Nanoparticles ◽  
Catalytic Co Oxidation

scholarly journals What Changes on the Inverse Catalyst? Insight From CO Oxidation on Au-Supported Ceria Nanoparticles Using Ab Initio Molecular Dynamics

2019 ◽  
Author(s):  
Yong Li ◽  
Shikun Li ◽  
Marcus Bäumer ◽  
Lyudmila V. Moskaleva
Keyword(s):  
Ab Initio ◽  
Co Oxidation ◽  
Au Nanoparticles ◽  
Ab Initio Molecular Dynamics ◽  
Simulation Studies ◽  
Oxidation Reactions ◽  
Oxide Interfaces ◽  
Improved Stability ◽  
Reducible Oxides ◽  
Inverse Catalyst

Oxidation reactions catalyzed by Au nanoparticles supported on reducible oxides have been widely studied both experimentally and theoretically, whereas <i>inverse catalysts</i>, in which oxide nanoparticles are supported on metal surfaces, received considerably less attention. In both systems catalytic activity at metal – oxide interfaces can arise not only from each material contributing its functionality, but also from their interactions creating properties beyond the sum of individual components. Inverse catalysts may retain the synergy between the metal and oxide functionalities, while offering further specific advantages, e.g. a possibility to have better control over interfacial sites or to yield improved stability, activity, and selectivity. Our work provides the mechanism of O atom/vacancy diffusion-assisted Mars-van-Krevelen CO oxidation on gold-supported ceria nanoparticle through state-of-the-art ab initio molecular dynamic simulation studies.

scholarly journals Size-dependent dynamic structures of supported gold nanoparticles in CO oxidation reaction condition

2018 ◽  
Vol 115 (30) ◽  
pp. 7700-7705 ◽  
Author(s):  
Yang He ◽  
Jin-Cheng Liu ◽  
Langli Luo ◽  
Yang-Gang Wang ◽  
Junfa Zhu ◽  
...  
Keyword(s):  
Co Oxidation ◽  
Oxidation Reaction ◽  
Au Nanoparticles ◽  
Working Condition ◽  
Ab Initio Molecular Dynamics ◽  
Present Observation ◽  
Size Dependent ◽  
Reaction Condition ◽  
Au Clusters ◽  
Co Oxidation Reaction

Gold (Au) catalysts exhibit a significant size effect, but its origin has been puzzling for a long time. It is generally believed that supported Au clusters are more or less rigid in working condition, which inevitably leads to the general speculation that the active sites are immobile. Here, by using atomic resolution in situ environmental transmission electron microscopy, we report size-dependent structure dynamics of single Au nanoparticles on ceria (CeO2) in CO oxidation reaction condition at room temperature. While large Au nanoparticles remain rigid in the catalytic working condition, ultrasmall Au clusters lose their intrinsic structures and become disordered, featuring vigorous structural rearrangements and formation of dynamic low-coordinated atoms on surface. Ab initio molecular-dynamics simulations reveal that the interaction between ultrasmall Au cluster and CO molecules leads to the dynamic structural responses, demonstrating that the shape of the catalytic particle under the working condition may totally differ from the shape under the static condition. The present observation provides insight on the origin of superior catalytic properties of ultrasmall gold clusters.

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