Promoting effects of lanthanum on the catalytic activity of Au/TiO2 nanotubes for CO oxidation

RSC Advances ◽  
2015 ◽  
Vol 5 (16) ◽  
pp. 11989-11995 ◽  
Author(s):  
Ping Zhang ◽  
Jiuli Guo ◽  
Peng Zhao ◽  
Bolin Zhu ◽  
Weiping Huang ◽  
...  
Keyword(s):  
Catalytic Activity ◽  
Co Oxidation ◽  
Tio2 Nanotubes ◽  
Gold Particles

TEM image of Au/La2O3–TiO2-NTs. Gold particles were distributed homogeneously on La modified TiO2 NTs.

Enhanced CO catalytic oxidation over an Au–Pt alloy supported on TiO2 nanotubes: investigation of the hydroxyl and Au/Pt ratio influences

2018 ◽  
Vol 8 (23) ◽  
pp. 6109-6122 ◽  
Author(s):  
Jing-Jing Li ◽  
Bao-Lin Zhu ◽  
Gui-Chang Wang ◽  
Zun-Feng Liu ◽  
Wei-Ping Huang ◽  
...  
Keyword(s):  
Catalytic Activity ◽  
Co Oxidation ◽  
Catalytic Oxidation ◽  
Tio2 Nanotubes ◽  
Catalytic Mechanism ◽  
Reaction Pathways ◽  
Co Catalytic Oxidation ◽  
Pt Alloy

The schematic illustrates the catalytic mechanism and reaction pathways of Au–Pt/TiO2 SNT catalysts with enhanced catalytic activity for 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.

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

Selective CO oxidation with nano gold particles-based catalysts over Al2O3 and ZrO2

2008 ◽  
Vol 347 (1) ◽  
pp. 62-71 ◽  
Author(s):  
Nielson F.P. Ribeiro ◽  
Fabiana M.T. Mendes ◽  
Carlos A.C. Perez ◽  
Mariana M.V.M. Souza ◽  
Martin Schmal
Keyword(s):  
Co Oxidation ◽  
Gold Particles ◽  
Selective Co Oxidation ◽  
Nano Gold

Effect of Impurity and Pretreatment Conditions on the Catalytic Activity of Au Powder for CO Oxidation

2004 ◽  
Vol 97 (3/4) ◽  
pp. 203-208 ◽  
Author(s):  
Yasuo Iizuka ◽  
Aya Kawamoto ◽  
Kazuhiro Akita ◽  
Masakazu Daté ◽  
Susumu Tsubota ◽  
...  
Keyword(s):  
Catalytic Activity ◽  
Co Oxidation ◽  
Pretreatment Conditions

Small gold particles supported on MgFe2O4 nanocrystals as novel catalyst for CO oxidation

2010 ◽  
Vol 386 (1-2) ◽  
pp. 94-100 ◽  
Author(s):  
Chun-Jiang Jia ◽  
Yong Liu ◽  
Manfred Schwickardi ◽  
Claudia Weidenthaler ◽  
Bernd Spliethoff ◽  
...  
Keyword(s):  
Co Oxidation ◽  
Gold Particles ◽  
Novel Catalyst

Synthesis and characterization of new isostructural series LnFe0.5Sb1.5O6 (Ln = La-Sm) exhibiting high catalytic activity in CO oxidation

2019 ◽  
Vol 777 ◽  
pp. 655-662 ◽  
Author(s):  
A.V. Egorysheva ◽  
O.G. Ellert ◽  
E. Yu Liberman ◽  
D.I. Kirdyankin ◽  
S.V. Golodukhina ◽  
...  
Keyword(s):  
Catalytic Activity ◽  
Co Oxidation ◽  
Synthesis And Characterization ◽  
High Catalytic Activity
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