Hydrogen Atom Chemisorbed Gold Clusters as Highly Active Catalysts for Oxygen Activation and CO Oxidation

2014 ◽  
Vol 118 (51) ◽  
pp. 30057-30062 ◽  
Author(s):  
Dar Manzoor ◽  
Sourav Pal
Keyword(s):  
Hydrogen Atom ◽  
Co Oxidation ◽  
Oxygen Activation ◽  
Gold Clusters ◽  
Highly Active

Does enhanced oxygen activation always facilitate CO oxidation on gold clusters?

2015 ◽  
Vol 36 (29) ◽  
pp. 2177-2187 ◽  
Author(s):  
Krishnakanta Mondal ◽  
Arup Banerjee ◽  
Alessandro Fortunelli ◽  
Tapan K. Ghanty
Keyword(s):  
Co Oxidation ◽  
Oxygen Activation ◽  
Gold Clusters

scholarly journals Facet-Dependent Reactivity of Ceria Nanoparticles Exemplified by CeO2-Based Transition Metal Catalysts: A Critical Review

Catalysts ◽  
2021 ◽  
Vol 11 (4) ◽  
pp. 452
Author(s):  
Michalis Konsolakis ◽  
Maria Lykaki
Keyword(s):  
Transition Metal ◽  
Co Oxidation ◽  
Critical Review ◽  
Rational Design ◽  
Metal Catalysts ◽  
Co2 Hydrogenation ◽  
Transition Metal Catalysts ◽  
Fine Tuning ◽  
Ceria Nanoparticles ◽  
Highly Active

The rational design and fabrication of highly-active and cost-efficient catalytic materials constitutes the main research pillar in catalysis field. In this context, the fine-tuning of size and shape at the nanometer scale can exert an intense impact not only on the inherent reactivity of catalyst’s counterparts but also on their interfacial interactions; it can also opening up new horizons for the development of highly active and robust materials. The present critical review, focusing mainly on our recent advances on the topic, aims to highlight the pivotal role of shape engineering in catalysis, exemplified by noble metal-free, CeO2-based transition metal catalysts (TMs/CeO2). The underlying mechanism of facet-dependent reactivity is initially discussed. The main implications of ceria nanoparticles’ shape engineering (rods, cubes, and polyhedra) in catalysis are next discussed, on the ground of some of the most pertinent heterogeneous reactions, such as CO2 hydrogenation, CO oxidation, and N2O decomposition. It is clearly revealed that shape functionalization can remarkably affect the intrinsic features and in turn the reactivity of ceria nanoparticles. More importantly, by combining ceria nanoparticles (CeO2 NPs) of specific architecture with various transition metals (e.g., Cu, Fe, Co, and Ni) remarkably active multifunctional composites can be obtained due mainly to the synergistic metalceria interactions. From the practical point of view, novel catalyst formulations with similar or even superior reactivity to that of noble metals can be obtained by co-adjusting the shape and composition of mixed oxides, such as Cu/ceria nanorods for CO oxidation and Ni/ceria nanorods for CO2 hydrogenation. The conclusions derived could provide the design principles of earth-abundant metal oxide catalysts for various real-life environmental and energy applications.

Highly active PdCeOx composite catalysts for low-temperature CO oxidation, prepared by plasma-arc synthesis

2014 ◽  
Vol 147 ◽  
pp. 132-143 ◽  
Author(s):  
R.V. Gulyaev ◽  
E.M. Slavinskaya ◽  
S.A. Novopashin ◽  
D.V. Smovzh ◽  
A.V. Zaikovskii ◽  
...  
Keyword(s):  
Low Temperature ◽  
Co Oxidation ◽  
Plasma Arc ◽  
Composite Catalysts ◽  
Highly Active ◽  
Low Temperature Co Oxidation

Preparation of Highly Active, Low Au-Loaded, Au/CeO2 Nanoparticle Catalysts That Promote CO Oxidation at Ambient Temperatures

2009 ◽  
Vol 114 (2) ◽  
pp. 793-798 ◽  
Author(s):  
Mingmei Han ◽  
Xiaojing Wang ◽  
Yuenian Shen ◽  
Changhe Tang ◽  
Guangshe Li ◽  
...  
Keyword(s):  
Co Oxidation ◽  
Ambient Temperatures ◽  
Nanoparticle Catalysts ◽  
Highly Active

scholarly journals CO oxidation over Pt-modified CuO catalysts in the presence of water vapour and SO2

2015 ◽  
Vol 18 (2) ◽  
pp. 187-196
Author(s):  
Tri Nguyen ◽  
Anh Cam Ha ◽  
Loc Cam Luu ◽  
Cuong Tien Hoang ◽  
Thi Thi Yen Trinh ◽  
...  
Keyword(s):  
Co Oxidation ◽  
Water Vapour ◽  
Co Adsorption ◽  
X Ray Diffraction ◽  
Active Centers ◽  
Highly Active ◽  
Transmission Electron ◽  
Physico Chemical ◽  
Adsorption Of Co ◽  
Temperature Programmed

The optimal Pt-modified CuO supported on γ-Al2O3 and γ-Al2O3 + CeO2 catalysts have been prepared. Physico-chemical characteristics of catalysts were investigated and determined by the methods of N2 adsorption (BET), X-ray diffraction (XRD), scanning electron microscope (SEM), transmission electron microscopy (TEM), temperature-programmed reduction (TPR), and hydrogen pulse chemisorption (HPC). The characteristics of carbon monoxide (CO) adsorption on catalysts were defined by the method of infrared spectroscopy (IR) in the range of 4000 – 400 cm-1. The effect of the mixture of water vapour and SO2 on the activity of these catalysts for the CO oxidation was assessed. Reactions were conducted at 200oC and 350oC in the absence and presence of the mixture of water vapour (1.1 mol %) and SO2 (0.0625 mol %). Concentrations of O2 and CO in the gas mixture were 9.2 mol % and 0.5 mol %, respectively. The results showed that in the catalysts there exist highly active centers Cu1+ and Pt2+. On the catalysts the adsorption of CO on Cu2+, Pt2+, CeO2, and γ - Al2O3 centres was observed. Addition of CeO2 led to increase the reductivity, CO adsorption but decrease in specific surface area of catalyst. The result PtCu/CeAl catalyst shown higher active, but lower stability compared to PtCu/Al catalyst. The mixture of water vapour and SO2 showed the reversible poisoning toward the Pt-CuO catalysts at a temperature of 350oC, but irreversible at 200oC

Co3O4 nanostructures and Co3O4 supported on halloysite nanotubes: New highly active and thermally stable feasible catalysts for CO oxidation

2020 ◽  
Vol 190 ◽  
pp. 105590 ◽  
Author(s):  
Lucy-Caterine Daza-Gómez ◽  
Víctor-Fabián Ruiz-Ruiz ◽  
J. Arturo Mendoza-Nieto ◽  
Heriberto Pfeiffer ◽  
David Díaz
Keyword(s):  
Co Oxidation ◽  
Halloysite Nanotubes ◽  
Thermally Stable ◽  
Highly Active ◽  
Co3o4 Nanostructures

Isotope labelling study of CO oxidation-assisted epoxidation of propene. Implications for oxygen activation on Au catalysts

2010 ◽  
Vol 46 (21) ◽  
pp. 3791 ◽  
Author(s):  
Jian Jiang ◽  
Sean M. Oxford ◽  
Baosong Fu ◽  
Mayfair C. Kung ◽  
Harold H. Kung ◽  
...  
Keyword(s):  
Co Oxidation ◽  
Oxygen Activation ◽  
Isotope Labelling

scholarly journals Dynamics of gold clusters on ceria during CO oxidation

2020 ◽  
Vol 392 ◽  
pp. 39-47
Author(s):  
Ming-Wen Chang ◽  
Long Zhang ◽  
Micha Davids ◽  
Ivo A.W. Filot ◽  
Emiel J.M. Hensen
Keyword(s):  
Co Oxidation ◽  
Gold Clusters

Facile synthesis of a CuMnOx catalyst based on a mechanochemical redox process for efficient and stable CO oxidation

2020 ◽  
Vol 8 (46) ◽  
pp. 24438-24444
Author(s):  
Jiafeng Bao ◽  
Xiaolan Duan ◽  
Pengfei Zhang
Keyword(s):  
Low Temperature ◽  
Co Oxidation ◽  
Catalytic Combustion ◽  
Redox Process ◽  
Facile Synthesis ◽  
Highly Active ◽  
Co Removal

Low-temperature catalytic combustion of CO is a desirable route for CO removal. We reported the sythesis of highly active CuMnOx catalyst by a mechanochemical redox process.

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