High Catalytic Activity for CO Oxidation of Gold Nanoparticles Confined in Acidic Support Al-SBA-15 at Low Temperatures

2005 ◽  
Vol 109 (38) ◽  
pp. 18042-18047 ◽  
Author(s):  
Chia-Wen Chiang ◽  
Aiqin Wang ◽  
Ben-Zu Wan ◽  
Chung-Yuan Mou
Keyword(s):  
Gold Nanoparticles ◽  
Catalytic Activity ◽  
Co Oxidation ◽  
Low Temperatures ◽  
High Catalytic Activity ◽  
Acidic Support

Preparation of TiO2-supported twinned gold nanoparticles by CO treatment and their CO oxidation activity

2015 ◽  
Vol 51 (87) ◽  
pp. 15823-15826 ◽  
Author(s):  
Junya Ohyama ◽  
Taiki Koketsu ◽  
Yuta Yamamoto ◽  
Shigeo Arai ◽  
Atsushi Satsuma
Keyword(s):  
Gold Nanoparticles ◽  
Catalytic Activity ◽  
Co Oxidation ◽  
Au Nanoparticles ◽  
High Catalytic Activity ◽  
Oxidation Activity

Au/TiO2 prepared by CO treatment showed high catalytic activity for CO oxidation due to twinned structure of Au nanoparticles.

The Relation between Catalytic Activity of CO Oxidation and Support Structure in Oxidation Catalysts using Gold Nanoparticles

2005 ◽  
Vol 900 ◽  
Author(s):  
Shiho Nagano ◽  
Koji Tajiri ◽  
Yutaka Tai
Keyword(s):  
Gold Nanoparticles ◽  
Catalytic Activity ◽  
Co Oxidation ◽  
Preparation Method ◽  
Surface Condition ◽  
Silica Aerogels ◽  
High Catalytic Activity ◽  
Support Materials ◽  
Co Oxidation Reaction ◽  
The Difference

ABSTRACTThiol-passivated gold nanoparticles were adsorbed on several kinds of support materials such as titania-coated silica aerogels and xerogels etc., and then the thiol was removed by heat treatment. The catalytic activity of the prepared composites for CO oxidation reaction was measured, and the effects of the support on the catalytic activity were investigated. Density of the supports, namely, whether aerogel supports or xerogel ones, hardly affected the catalytic activity. It was found that the catalysts having high catalytic activity could be obtained by this preparation method, even using the xerogels as the support. Calcination of the supports before adsorption of the gold nanoparticles affected the activity. The difference of the catalytic activity was observed between the composites with same gold nanoparticle size, so it was considered that the surface condition of the support materials affects the state of gold nanoparticles in composite.

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.

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

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

High catalytic activity for CO oxidation on single Fe atom stabilized in graphene vacancies

RSC Advances ◽  
2016 ◽  
Vol 6 (96) ◽  
pp. 93985-93996 ◽  
Author(s):  
Yanan Tang ◽  
Jincheng Zhou ◽  
Zigang Shen ◽  
Weiguang Chen ◽  
Chenggang Li ◽  
...  
Keyword(s):  
Catalytic Activity ◽  
Co Oxidation ◽  
First Principles ◽  
High Catalytic Activity ◽  
First Principles Method

The geometric, electronic and catalytic characters of Fe atom embedded graphene (including monovacancy and divacancy) are investigated using the first-principles method, which gives a reference on designing graphene-based catalysts for CO oxidation.

scholarly journals Catalysts based on carbon xerogels with high catalytic activity for the reduction of NOx at low temperatures

2020 ◽  
Vol 356 ◽  
pp. 301-311
Author(s):  
Esther Bailón-García ◽  
Ewelina Drwal ◽  
Teresa Grzybek ◽  
Carlos Henriques ◽  
M. Filipa Ribeiro
Keyword(s):  
Catalytic Activity ◽  
Low Temperatures ◽  
High Catalytic Activity ◽  
Carbon Xerogels ◽  
Reduction Of Nox

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

A highly moisture-resistant Fe-doped mesoporous Co3O4 catalyst for efficient low-temperature CO oxidation

2015 ◽  
Vol 39 (3) ◽  
pp. 1742-1748 ◽  
Author(s):  
Gengnan Li ◽  
Liang Li ◽  
Yongsheng Li ◽  
Jianlin Shi
Keyword(s):  
Catalytic Activity ◽  
Low Temperature ◽  
Co Oxidation ◽  
High Catalytic Activity ◽  
Low Temperature Co Oxidation ◽  
Moisture Conditions ◽  
Moisture Resistant

Compared with pure Co3O4 spinel, the Fe-doped catalyst demonstrates high catalytic activity and stability in low temperature CO oxidation under moisture conditions.

Origin of extraordinarily high catalytic activity of Co3O4 and its morphological chemistry for CO oxidation at low temperature

2012 ◽  
Vol 296 ◽  
pp. 110-119 ◽  
Author(s):  
Hai-Feng Wang ◽  
Richard Kavanagh ◽  
Yang-Long Guo ◽  
Yun Guo ◽  
Guanzhong Lu ◽  
...  
Keyword(s):  
Catalytic Activity ◽  
Low Temperature ◽  
Co Oxidation ◽  
High Catalytic Activity
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