CO oxidation by the atomic oxygen on silver clusters: structurally dependent mechanisms generating free or chemically bonded CO2

2017 ◽  
Vol 19 (1) ◽  
pp. 196-203 ◽  
Author(s):  
Xizi Cao ◽  
Mengyi Chen ◽  
Jun Ma ◽  
Baoqi Yin ◽  
Xiaopeng Xing
Keyword(s):  
Co Oxidation ◽  
Atomic Oxygen ◽  
Silver Clusters ◽  
Oxidation Of Co

Oxidation of CO by the atomic oxygen on AgnO− (n = 1–8) forms free or chemically bonded CO2.

Theoretical study of catalytic oxidation of CO on free PdxO2+ (x = 4–6) clusters: size dependent comparison of combustion

RSC Advances ◽  
2015 ◽  
Vol 5 (53) ◽  
pp. 42329-42340 ◽  
Author(s):  
Chandan Sahu ◽  
Deepanwita Ghosh ◽  
Abhijit K. Das
Keyword(s):  
Co Oxidation ◽  
Catalytic Oxidation ◽  
Theoretical Study ◽  
Dft Study ◽  
Oxidation Of Co ◽  
Catalytic Co Oxidation ◽  
Size Dependent ◽  
Catalytic Oxidation Of Co

A DFT study has been adopted to explore the catalytic CO oxidation on a free PdxO2+ (x = 4–6) cluster.

Comparing study of the effect of the CeO2-based carrier materials on the total oxidation of CO, methane, and propane over RuO2

2021 ◽  
Author(s):  
Zheng Wang ◽  
Omeir Khalid ◽  
Wei Wang ◽  
Yu Wang ◽  
Tim Weber ◽  
...  
Keyword(s):  
Co Oxidation ◽  
Intrinsic Activity ◽  
Oxidation Reactions ◽  
Oxidation Of Co ◽  
Propane Combustion ◽  
Total Oxidation ◽  
Carrier Material ◽  
Highly Dispersed ◽  
Carrier Materials

The effect of the carrier material on the intrinsic activity of three catalytic total oxidation reactions, namely CO oxidation as well as methane and propane combustion over highly dispersed RuO2...

CO oxidation by MoS2-supported Au19 nanoparticles: effects of vacancy formation and tensile strain

2016 ◽  
Vol 18 (19) ◽  
pp. 13232-13238 ◽  
Author(s):  
Soonho Kwon ◽  
Kihyun Shin ◽  
Kihoon Bang ◽  
Hyun You Kim ◽  
Hyuck Mo Lee
Keyword(s):  
Density Functional Theory ◽  
Co Oxidation ◽  
Catalytic Oxidation ◽  
Density Functional ◽  
Tensile Strain ◽  
Density Functional Theory Calculations ◽  
Vacancy Formation ◽  
Oxidation Of Co ◽  
Functional Theory ◽  
Catalytic Oxidation Of Co

The mechanism of the catalytic oxidation of CO activated by MoS2-supported Au19 nanoparticles (NPs) was studied using density functional theory calculations.

Investigation of oxygen vacancies on Pt- or Au-modified CeO2 materials for CO oxidation

RSC Advances ◽  
2016 ◽  
Vol 6 (74) ◽  
pp. 70653-70659 ◽  
Author(s):  
Yanjie Zhang ◽  
Yanyan Zhao ◽  
Han Zhang ◽  
Liyuan Zhang ◽  
Huipeng Ma ◽  
...  
Keyword(s):  
Co Oxidation ◽  
Oxygen Vacancies ◽  
Precipitation Method ◽  
Oxidation Of Co ◽  
Redox Ability

Metal (Au or Pt)-modified CeO2 materials with excellent redox ability for the oxidation of CO to CO2 were prepared by a redox precipitation method and a certain amount (4.2%) of oxygen vacancies was necessary to improve the CO oxidation on Pt-CeO2.

scholarly journals Low-Temperature Oxidation of CO in Smoke: A Review

2006 ◽  
Vol 22 (2) ◽  
pp. 89-106 ◽  
Author(s):  
AJ Dyakonov ◽  
EA Robinson
Keyword(s):  
Low Temperature ◽  
Co Oxidation ◽  
Diffusion Processes ◽  
Catalyst Activity ◽  
Catalyst Support ◽  
Catalyst Preparation ◽  
Fast Diffusion ◽  
Oxidation Of Co ◽  
Oxidation Activity ◽  
Temperature Oxidation

AbstractThe low-temperature catalytic oxidation of CO has been reviewed, targeting its possible application to cigarette smoke. The treatment of CO in smoke by using a filter-packed catalyst is extremely complicated by the presence of a variety of chemically active gaseous compounds, a particulate phase, the high velocity of pulsing smoke flow, and ambient temperature. The relevant mechanisms of catalysis and the catalyst preparation variables that could help to overcome these problems are considered. Possible contributors to the overall kinetics that must include variety of diffusion processes were briefly discussed. The chemisorption of O2, CO and CO2 on Pd, Pt and Au and on partially reducible supports, surface reactions and oscillations of the CO oxidation rate were analyzed. The effects of the surface structure and electronic properties of the catalyst support, preparation conditions and presence of a second transition metal on the projected CO oxidation activity of the catalysts in smoke are also discussed. The reviewed catalyst preparation approaches can solve the low-temperature catalyst activity problem. However, more work is required to stabilize this activity of an air-exposed catalyst to provide a necessary shelf life for a cigarette. The greatest challenge seems to be a particular phase - exclusive selectivity that would not contradict with the necessary fast diffusion of gases through the catalyst pores.

Nucleobases tagged to gold nanoclusters cause a mechanistic crossover in the oxidation of CO

2015 ◽  
Vol 17 (37) ◽  
pp. 24275-24281 ◽  
Author(s):  
Sandhya Rai ◽  
Masahiro Ehara ◽  
U. Deva Priyakumar
Keyword(s):  
Co Oxidation ◽  
Gold Nanoclusters ◽  
Gold Clusters ◽  
Oxidation Of Co

A mechanistic crossover is observed upon using nucleobase tagged gold clusters as catalysts favoring the Eley–Rideal mechanism, over the conventional Langmuir–Hinshelwood pathway followed using pristine gold clusters during CO oxidation.

Cryogenic CO Oxidation on TiO2-Supported Gold Nanoclusters Precovered with Atomic Oxygen

2003 ◽  
Vol 125 (8) ◽  
pp. 2018-2019 ◽  
Author(s):  
Tae S. Kim ◽  
James D. Stiehl ◽  
Christopher T. Reeves ◽  
Randall J. Meyer ◽  
C. Buddie Mullins
Keyword(s):  
Co Oxidation ◽  
Atomic Oxygen ◽  
Gold Nanoclusters ◽  
Supported Gold

Water-Enhanced Low-Temperature CO Oxidation and Isotope Effects on Atomic Oxygen-Covered Au(111)

2008 ◽  
Vol 130 (21) ◽  
pp. 6801-6812 ◽  
Author(s):  
Rotimi A. Ojifinni ◽  
Nathan S. Froemming ◽  
Jinlong Gong ◽  
Ming Pan ◽  
Tae S. Kim ◽  
...  
Keyword(s):  
Low Temperature ◽  
Co Oxidation ◽  
Atomic Oxygen ◽  
Isotope Effects ◽  
Low Temperature Co Oxidation

Bimetallic Co and Mn Supported on Hydroxyapatite Catalyst for Carbon Monoxide Oxidation at Lower Temperature

2021 ◽  
Author(s):  
Rahul More ◽  
Pavan More
Keyword(s):  
Activation Energy ◽  
Carbon Monoxide ◽  
Co Oxidation ◽  
Bimetallic Catalyst ◽  
Active Species ◽  
Deposition Method ◽  
Oxidation Of Co ◽  
Oxidation Activity ◽  
Lower Temperature ◽  
Monometallic Catalyst

Abstract The series of bimetallic Co and Mn supported on hydroxyapatite catalyst were prepared by successive deposition method and examined for CO oxidation. The CO oxidation activity was compared with monometallic Mn/HAp and Co/HAp. The catalysts are characterized in detail and correlated to the oxidation activity. The XRD, XPS and TPR characterization showed the presence of more facile Co2+, Mn3+ and adsorbed oxygen due to the interaction between Mn and Co. The 0.4 mol Mn and 0.1 mol Mn deposited on HAp showed formation of maximum active species. The maximum CoO species was observed over bimetallic catalyst compared to the monometallic catalyst. These active lower the activation energy require for CO and oxygen. These species were responsible for the oxidation of CO at lower temperature compared to the remaining catalyst.

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