A mullite oxide catalyst of SmMn2O5 for three-way catalysis: synthesis, characterization, and catalytic activity evaluation

RSC Advances ◽  
2016 ◽  
Vol 6 (70) ◽  
pp. 65950-65959 ◽  
Author(s):  
Pengfei Zhao ◽  
Pengfei Yu ◽  
Zijian Feng ◽  
Rong Chen ◽  
Liwei Jia ◽  
...  
Keyword(s):  
Catalytic Activity ◽  
Co Oxidation ◽  
Oxide Catalyst ◽  
Oxidation Activity ◽  
Activity Evaluation ◽  
Co Conversion ◽  
Three Way Catalysis

CO conversion as a function of temperature for SMO and LCO is shown in the graphical abstract image. SMO reached 95% conversion at 150 °C and showed a better CO oxidation activity than LCO.

Reductive-heat-treated platinum tungsten oxide catalyst with improved CO oxidation activity and CO gas sensing property

2019 ◽  
Vol 11 (13) ◽  
pp. 1811-1815
Author(s):  
Shiwei Liu ◽  
Liang Liang ◽  
Qixian Zhang ◽  
Changpeng Liu ◽  
Wei Xing ◽  
...  
Keyword(s):  
Co Oxidation ◽  
Tungsten Oxide ◽  
Oxide Catalyst ◽  
Gas Sensing ◽  
Oxidation Activity ◽  
Heat Treated ◽  
Electro Oxidation ◽  
Co Gas

Reductive-heat-treated platinum tungsten oxide presented excellent CO electro-oxidation activity and was applied in electrochemical CO gas sensing method.

EFFECTS OF CATALYST PREPARATION CONDITIONS ON NANO-GOLD DEPOSITED ON ZSM-5 FOR CO OXIDATION

2008 ◽  
Vol 22 (18n19) ◽  
pp. 3278-3288 ◽  
Author(s):  
A. H. SHAHBAZI KOOTENAEI ◽  
M. KAZEMEINI ◽  
H. KAZEMIAN
Keyword(s):  
Catalytic Activity ◽  
Acid Solution ◽  
Co Oxidation ◽  
Catalyst Preparation ◽  
Effect Of Temperature ◽  
Chloroauric Acid ◽  
Preparation Conditions ◽  
Activity Effect ◽  
Nano Gold ◽  
Co Conversion

Calcined Na - ZSM -5 zeolite was directly reacted with the chloroauric acid solution in different concentrations and pH for gold loading process. The synthesized Au / ZSM -5 catalyst was then characterized using XRD, BET, SEM, TEM and EDS techniques. In order to evaluate its catalytic activity, effect of temperature on CO conversion was investigated.

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.

scholarly journals Origin of the catalytic activity of face-centered-cubic ruthenium nanoparticles determined from an atomic-scale structure

2016 ◽  
Vol 18 (44) ◽  
pp. 30622-30629 ◽  
Author(s):  
L. S. R. Kumara ◽  
Osami Sakata ◽  
Shinji Kohara ◽  
Anli Yang ◽  
Chulho Song ◽  
...  
Keyword(s):  
Catalytic Activity ◽  
Co Oxidation ◽  
Scale Structure ◽  
Atomic Scale ◽  
Face Centered Cubic ◽  
Ruthenium Nanoparticles ◽  
Oxidation Activity ◽  
Atomic Scale Structure ◽  
Face Centered

The 3D configuration models of novel fcc and conventional hcp ruthenium nanoparticles are studied to elucidate their CO oxidation activity.

Highly active and stable Au@CuxO core–shell nanoparticles supported on alumina for carbon monoxide oxidation at low temperature

RSC Advances ◽  
2016 ◽  
Vol 6 (79) ◽  
pp. 75126-75132 ◽  
Author(s):  
Weining Zhang ◽  
Qingguo Zhao ◽  
Xiaohong Wang ◽  
Xiaoxia Yan ◽  
Sheng Han ◽  
...  
Keyword(s):  
Carbon Monoxide ◽  
Catalytic Activity ◽  
Low Temperature ◽  
Co Oxidation ◽  
Room Temperature ◽  
Core Shell ◽  
Shell Nanoparticles ◽  
Highly Active ◽  
Co Conversion ◽  
Core Shell Nanoparticles

Au@CuxO core–shell nanoparticles and Au@CuxO/Al2O3 used for CO oxidation at low temperature are prepared. CO conversion on Au@CuxO/Al2O3 can reach to 38% at room temperature and the catalytic activity remains unchanged after 108 hours reaction.

scholarly journals The influence of CePO4 nanorods on the CO oxidation activity of Au/GdPO4-rods

RSC Advances ◽  
2018 ◽  
Vol 8 (39) ◽  
pp. 21699-21711
Author(s):  
Yu Huanhuan ◽  
Chen Fayun ◽  
Zhubaolin Zhubaolin ◽  
Huang Weiping ◽  
Zhang Shoumin
Keyword(s):  
Catalytic Activity ◽  
High Temperature ◽  
Co Oxidation ◽  
Oxidation Activity ◽  
Temperature Resistance ◽  
Ultrasound Method ◽  
High Temperature Resistance ◽  
Good Catalytic Activity ◽  
Content Of Gold ◽  
Good Support

A CePO4–GdPO4 composite was prepared by a general ultrasound method and could be a good support for gold nanocatalysts. Au/CePO4–GdPO4 catalysts with a low content of gold showed good catalytic activity, high temperature resistance and stability for CO oxidation.

scholarly journals Synthesis and characterization of perovskite-supported CoNi catalyst for CO oxidation via exsolution

2021 ◽  
Vol 1195 (1) ◽  
pp. 012029
Author(s):  
G L Lew ◽  
N Ibrahim ◽  
S Abdullah ◽  
W R W Daud ◽  
W K W Ramli
Keyword(s):  
Catalytic Activity ◽  
Co Oxidation ◽  
Production Rate ◽  
Perovskite Oxide ◽  
Metal Catalyst ◽  
Solid State Method ◽  
Cobalt Nickel ◽  
Co Conversion ◽  
Parameter Modification ◽  
Lower Temperature

Abstract The introduction of perovskite oxide as catalysts alternative has increased the worldwide interest due to its advantages such as its versatility to accommodate different transition metals. This study set out to evaluate the catalytic activity of CO oxidative perovskite catalysts (LCCNTO), fabricated via solid-state method and reduced under various reducing condition for the exsolution of the active metals, Cobalt-Nickel (CoNi) from the perovskite lattice. The effect of reducing parameter modification towards the catalytic activity of the fabricated LCCNTO was discussed in terms of CO conversion and CO2 production rate. Through the light-off test, the sample that reduced with the longest deration (S2T10H6-R5H5) showed the highest CO conversion of 45.45% and CO2 production rate of 0.1409 × 10−4 mol s− 1g−1 at the reaction temperature of 500 °C. Not only that, it was discovered that by controlling the reducing duration, the initiate temperature for the reaction to occur was lowered from 360 °C (S2T10H6-R5H3) enabling the reaction to occur at lower temperature at 280 °C in S2T10H6-R5H5. Under the same reducing temperature, the CO2 production of sample reduced for 200 minutes (S2T10H6-R5H3) started at 360 °C but as the reducing duration increased to 300 minutes (S2T10H6-R5H5), the CO oxidation initiated at a much lower temperature of 280 °C. Although LCCNTO catalyst still suffer from similar deterioration as the other reported base metal catalyst, but tuning the reducing duration given to a sample, it greatly affects the initiation temperature for the reaction to occur.

Charaterization and Catalytic Activity of CuO and NiO Supported on ZrO2 for CO Low Temperature Oxidation

2013 ◽  
Vol 842 ◽  
pp. 237-241 ◽  
Author(s):  
Zhi Chen ◽  
Yi Long Xie ◽  
Jin Xing Qiu ◽  
Zhong He Chen
Keyword(s):  
Catalytic Activity ◽  
Low Temperature ◽  
Co Oxidation ◽  
High Activity ◽  
Conversion Efficiency ◽  
Sol Gel ◽  
Coprecipitation Method ◽  
Low Temperature Oxidation ◽  
Temperature Oxidation ◽  
Co Conversion

ZrO2 support has been prepared by sol-gel and coprecipitation method. CuO and NiO were supported on the supports and they were the activity metals for the catalysts. The CO conversion was tested. The light-off temperature of CO oxidation was 22°C and CO conversion efficiency was up to 50% at 169°C. The prepared catalysts of Cu, Ni supported on ZrO2-A had a high activity for CO oxidation at low temperature.

Composition, Structure, and Catalytic Activity of SiO2+TiO2/Ti and MnOx+SiO2+TiO2/Ti Composites Formed by Combination of the Methods of Plasma Electrolytic Oxidation, Impregnation and Annealing

2015 ◽  
Vol 245 ◽  
pp. 238-242 ◽  
Author(s):  
Marina S. Vasilyeva ◽  
V.S. Rudnev ◽  
Alexander Yu. Ustinov
Keyword(s):  
Catalytic Activity ◽  
Co Oxidation ◽  
Plasma Electrolytic Oxidation ◽  
Manganese Oxides ◽  
Outer Part ◽  
Oxide Layers ◽  
Co Conversion ◽  
Electrolytic Oxidation ◽  
Composition Structure ◽  
Plasma Electrolytic

New data on the structure of silicon-containing oxide layers SiO2+TiO2 on titanium formed by the method of plasma electrolytic oxidation (PEO) as well as on the structure and catalytic activity in CO oxidation of MnOx+SiO2+TiO2/Ti composites formed on their basis using impregnation and annealing methods have been obtained. It has been demonstrated that silicon and titanium are rather homogeneously distributed over the SiO2+TiO2 coating bulk. The coating outer part is silicon-enriched titanium-depleted. The MnOx+SiO2+TiO2/Ti composites catalyze the CO conversion at temperatures above 100°C. Nanowhiskers consisting predominantly of manganese oxides have been found on the surface of the MnOx+SiO2+TiO2/Ti composites.

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