Catalysis by Supported Gold:  Correlation between Catalytic Activity for CO Oxidation and Oxidation States of Gold

2004 ◽  
Vol 126 (9) ◽  
pp. 2672-2673 ◽  
Author(s):  
Javier Guzman ◽  
Bruce C. Gates
Keyword(s):  
Catalytic Activity ◽  
Co Oxidation ◽  
Oxidation States ◽  
Supported Gold

Size and Catalytic Activity of Supported Gold Nanoparticles: An in Operando Study during CO Oxidation

2011 ◽  
Vol 115 (11) ◽  
pp. 4673-4679 ◽  
Author(s):  
I. Laoufi ◽  
M.-C. Saint-Lager ◽  
R. Lazzari ◽  
J. Jupille ◽  
O. Robach ◽  
...  
Keyword(s):  
Gold Nanoparticles ◽  
Catalytic Activity ◽  
Co Oxidation ◽  
In Operando ◽  
Supported Gold Nanoparticles ◽  
Supported Gold

Enhance catalytic activity for CO oxidation over titania supported gold catalysts that dispersed on SiO2

2011 ◽  
Vol 160 (1) ◽  
pp. 144-152 ◽  
Author(s):  
Zhao-Wen Wang ◽  
Xin V. Wang ◽  
D. Ying Zeng ◽  
Ming-Shu Chen ◽  
Hui-Lin Wan
Keyword(s):  
Catalytic Activity ◽  
Co Oxidation ◽  
Gold Catalysts ◽  
Supported Gold Catalysts ◽  
Supported Gold

Cu Oxide Deposited on Shape-Controlled Ceria Nanocrystals for CO Oxidation: Influence of Interface-Driven Oxidation States on Catalytic Activity

2021 ◽  
Author(s):  
Kasala Prabhakar Reddy ◽  
Han Seul Choi ◽  
Daeho Kim ◽  
Ryong Ryoo ◽  
Jeong Y. Park
Keyword(s):  
Catalytic Activity ◽  
Heterogeneous Catalysis ◽  
Co Oxidation ◽  
Oxidation State ◽  
Oxidation States ◽  
Highly Active ◽  
Shape Controlled ◽  
The Relationship

The design of a catalyst with a highly active and stable oxidation state is of great interest in heterogeneous catalysis. Herein, the relationship between catalytic activity and oxidation state on...

The effect of the oxidation states of supported oxides on catalytic activity: CO oxidation studies on Pt/cobalt oxide

2019 ◽  
Vol 55 (64) ◽  
pp. 9503-9506 ◽  
Author(s):  
Hee Chan Song ◽  
Seungtaeg Oh ◽  
Sang Hoon Kim ◽  
Si Woo Lee ◽  
Song Yi Moon ◽  
...  
Keyword(s):  
Catalytic Activity ◽  
Metal Oxide ◽  
Co Oxidation ◽  
Cobalt Oxide ◽  
Platinum Nanoparticles ◽  
Oxidation States ◽  
Cobalt Oxides ◽  
Supported Oxides

The strong metal–oxide interaction of platinum nanoparticles (PtNPs) deposited on two types of cobalt oxides, CoO and Co3O4, was investigated using CO oxidation.

scholarly journals CO Oxidation Efficiency and Hysteresis Behavior over Mesoporous Pd/SiO2 Catalyst

Catalysts ◽  
2021 ◽  
Vol 11 (1) ◽  
pp. 131 ◽  
Author(s):  
Rola Mohammad Al Soubaihi ◽  
Khaled Mohammad Saoud ◽  
Myo Tay Zar Myint ◽  
Mats A. Göthelid ◽  
Joydeep Dutta
Keyword(s):  
Carbon Monoxide ◽  
Catalytic Activity ◽  
Co Oxidation ◽  
Active Sites ◽  
Bond Activation ◽  
Dissociative Adsorption ◽  
High Catalytic Activity ◽  
Good Catalytic Activity ◽  
Pretreatment Conditions ◽  
Oxidation Efficiency

Carbon monoxide (CO) oxidation is considered an important reaction in heterogeneous industrial catalysis and has been extensively studied. Pd supported on SiO2 aerogel catalysts exhibit good catalytic activity toward this reaction owing to their CO bond activation capability and thermal stability. Pd/SiO2 catalysts were investigated using carbon monoxide (CO) oxidation as a model reaction. The catalyst becomes active, and the conversion increases after the temperature reaches the ignition temperature (Tig). A normal hysteresis in carbon monoxide (CO) oxidation has been observed, where the catalysts continue to exhibit high catalytic activity (CO conversion remains at 100%) during the extinction even at temperatures lower than Tig. The catalyst was characterized using BET, TEM, XPS, TGA-DSC, and FTIR. In this work, the influence of pretreatment conditions and stability of the active sites on the catalytic activity and hysteresis is presented. The CO oxidation on the Pd/SiO2 catalyst has been attributed to the dissociative adsorption of molecular oxygen and the activation of the C-O bond, followed by diffusion of adsorbates at Tig to form CO2. Whereas, the hysteresis has been explained by the enhanced stability of the active site caused by thermal effects, pretreatment conditions, Pd-SiO2 support interaction, and PdO formation and decomposition.

The surface restructuring of copper oxides with mixed oxidation-states and their efficient CO oxidation properties

2021 ◽  
Vol 289 ◽  
pp. 129378
Author(s):  
Wei Liu ◽  
Baoqin Wang ◽  
Chenchen Cui ◽  
Yiwen Zhang ◽  
Lixuan Wang ◽  
...  
Keyword(s):  
Co Oxidation ◽  
Copper Oxides ◽  
Oxidation States ◽  
Surface Restructuring ◽  
Mixed Oxidation ◽  
Oxidation Properties

scholarly journals On the Effects of Doping on the Catalytic Performance of (La,Sr)CoO3. A DFT Study of CO Oxidation

Catalysts ◽  
2019 ◽  
Vol 9 (4) ◽  
pp. 312 ◽  
Author(s):  
Antonella Glisenti ◽  
Andrea Vittadini
Keyword(s):  
Catalytic Activity ◽  
Co Oxidation ◽  
Density Functional Calculations ◽  
Density Functional ◽  
Formation Energy ◽  
Oxygen Vacancies ◽  
Catalytic Performance ◽  
Energy Profiles ◽  
High Concentrations ◽  
3D Impurities

The effects of modifying the composition of LaCoO3 on the catalytic activity are predicted by density functional calculations. Partially replacing La by Sr ions has benefical effects, causing a lowering of the formation energy of O vacancies. In contrast to that, doping at the Co site is less effective, as only 3d impurities heavier than Co are able to stabilize vacancies at high concentrations. The comparison of the energy profiles for CO oxidation of undoped and of Ni-, Cu-m and Zn-doped (La,Sr)CoO3(100) surface shows that Cu is most effective. However, the effects are less spectacular than in the SrTiO3 case, due to the different energetics for the formation of oxygen vacancies in the two hosts.

CO Oxidation on Inverse CeOx/Cu(111) Catalysts: High Catalytic Activity and Ceria-Promoted Dissociation of O2

2011 ◽  
Vol 133 (10) ◽  
pp. 3444-3451 ◽  
Author(s):  
Fan Yang ◽  
Jesús Graciani ◽  
Jaime Evans ◽  
Ping Liu ◽  
Jan Hrbek ◽  
...  
Keyword(s):  
Catalytic Activity ◽  
Co Oxidation ◽  
High Catalytic Activity
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