YBa2Cu3O7−δXσ (X=F and CI): Highly Active and Durable Catalysts for the Selective Oxidation of Ethane to Ethene

2000 ◽  
Vol 193 (1) ◽  
pp. 65-79 ◽  
Author(s):  
H.X. Dai ◽  
C.F. Ng ◽  
C.T. Au
Keyword(s):  
Selective Oxidation ◽  
Highly Active ◽  
Ethane To Ethene

Highly Active Heterogeneous 3 nm Gold Nanoparticles on Mesoporous Carbon as Catalysts for Low-Temperature Selective Oxidation and Reduction in Water

ACS Catalysis ◽  
2015 ◽  
Vol 5 (2) ◽  
pp. 797-802 ◽  
Author(s):  
Shuai Wang ◽  
Jie Wang ◽  
Qingfei Zhao ◽  
Dandan Li ◽  
Jian-Qiang Wang ◽  
...  
Keyword(s):  
Gold Nanoparticles ◽  
Low Temperature ◽  
Selective Oxidation ◽  
Mesoporous Carbon ◽  
Highly Active

scholarly journals Au–Pd NPs immobilised on nanostructured ceria and titania: impact of support morphology on the catalytic activity for selective oxidation

2018 ◽  
Vol 8 (10) ◽  
pp. 2529-2539 ◽  
Author(s):  
Motaz Khawaji ◽  
David Chadwick
Keyword(s):  
Catalytic Activity ◽  
Selective Oxidation ◽  
Highly Active ◽  
Nanostructured Ceria

Au–Pd colloidal NPs immobilised on ceria nanorods are highly active catalysts for selective oxidation.

scholarly journals Bimetallic Gold-Silver Nanoparticles Supported on Zeolitic Imidazolate Framework-8 as Highly Active Heterogenous Catalysts for Selective Oxidation of Benzyl Alcohol into Benzaldehyde

Polymers ◽  
2018 ◽  
Vol 10 (10) ◽  
pp. 1089 ◽  
Author(s):  
Lili Liu ◽  
Xiaojing Zhou ◽  
Yongmei Yan ◽  
Jie Zhou ◽  
Wenping Zhang ◽  
...  
Keyword(s):  
Benzyl Alcohol ◽  
Selective Oxidation ◽  
Cluster Structure ◽  
Core Shell ◽  
Zeolitic Imidazolate Framework ◽  
Highly Active ◽  
Oxidation Of Benzyl Alcohol ◽  
Ag Particles ◽  
Gold Silver ◽  
Supported Gold

The metal-organic zeolite imidazolate framework-8 (ZIF-8) supported gold-silver bimetallic catalysts with a core-shell structure (Au@Ag/ZIF-8 and Ag@Au/ZIF-8) and cluster structure (AuAg/ZIF-8) were successfully prepared by the deposition-redispersion method. Energy dispersive X-ray spectroscopy (EDS) elemental mapping images displayed that in the Au@Ag/ZIF-8 catalyst, Ag atoms were deposited on an exposed Au surface, and core-shell structured Au@Ag particles with highly dispersed Ag as the shell were formed. Additionally, the XPS investigation at gold 4f levels and silver 3d levels indicated that the Au and Ag particles of Au@Ag/ZIF-8, Ag@Au/ZIF-8, and AuAg/ZIF-8 were in a zero valence state. Among the resultant catalysts obtained in this study, Ag@Au/ZIF-8 catalysts showed the highest catalytic activity for the selective oxidation of benzyl alcohol, followed by AuAg/ZIF-8 and Au@Ag/ZIF-8. The turnover frequency (TOF) values were in the order of Ag@Au/ZIF-8 (28.2 h−1) > AuAg/ZIF-8 (25.0 h−1) > Au@Ag/ZIF-8 (20.0 h−1) at 130 °C within 1 h under 8 bar O2 when using THF as solvent. The catalysts of Au@Ag/ZIF-8 and Ag@Au/ZIF-8 with core–shell structures have higher benzaldehyde selectivities (53.0% and 53.3%) than the AuAg/ZIF-8 catalyst (35.2%) in the selective oxidation of benzyl alcohol into benzaldehyde. The effect of the solvent, reaction temperature, reaction time, and reaction pressure on benzyl alcohol conversion and benzaldehyde selectivity in benzyl alcohol selective oxidation over Au@Ag/ZIF-8, Ag@Au/ZIF-8, and AuAg/ZIF-8 were also investigated. All of the catalysts showed excellent performance at 130 °C under 8 bar O2 within 1 h when using THF as the solvent in the selective oxidation of benzyl alcohol to benzaldehyde. Moreover, the catalysts can be easily recycled and used repetitively at least four times.

Titanium-Microfiber-Supported Binary-Oxide Nanocomposite with a Large Highly Active Interface for the Gas-Phase Selective Oxidation of Benzyl Alcohol

ChemCatChem ◽  
2015 ◽  
Vol 8 (2) ◽  
pp. 313-317 ◽  
Author(s):  
Guofeng Zhao ◽  
Songyu Fan ◽  
Longgang Tao ◽  
Ruijuan Chai ◽  
Qiaofei Zhang ◽  
...  
Keyword(s):  
Benzyl Alcohol ◽  
Gas Phase ◽  
Selective Oxidation ◽  
Binary Oxide ◽  
Highly Active ◽  
Oxidation Of Benzyl Alcohol

The Feasibility of Ni-Alumina Catalysts in Oxidative Dehydrogenation of Ethane

2008 ◽  
Vol 73 (8-9) ◽  
pp. 1177-1191 ◽  
Author(s):  
Libor Čapek ◽  
Lukáš Vaněk ◽  
Lucie Smoláková ◽  
Roman Bulánek ◽  
Jiří Adam
Keyword(s):  
Oxidative Dehydrogenation ◽  
Thermal Pretreatment ◽  
Nickel Aluminate ◽  
Highly Active ◽  
Tetrahedral Sites ◽  
Vis Spectroscopy ◽  
Ethane To Ethene ◽  
Nickel Species ◽  
The Relationship ◽  
Alumina Catalysts

The contribution deals with the development on the efficient Ni-alumina catalyst for the oxidative dehydrogenation (ODH) of ethane to ethene. The performance of Ni-alumina catalysts with varying nickel loadings and with thermal pretreatment was studied. We contribute to the understanding of the relationship between the activity of nickel species in ODH of ethane and its distribution. To analyze this effect, Ni-alumina catalysts were analyzed by UV-VIS spectroscopy, and H2-TPR profile. Ni-alumina catalysts were highly active and selective (ca. 80%) in the ODH of ethane. The catalysts contained both tetrahedral and octahedral nickel species, suggesting that nickel aluminate represented a partial spinel, where Ni(II) ions occupy both octahedral and tetrahedral sites of the oxygen lattice. It was suggested that the octahedral nickel species were more active than the tetrahedral ones.

Zeolite Confined Ti(OH)4 Nanoparticles in Highly Active and Selective Oxidation Catalyst

2011 ◽  
Vol 141 (7) ◽  
pp. 948-953 ◽  
Author(s):  
Istvan Halasz ◽  
Jian-Jie Liang ◽  
George Fitzgerald
Keyword(s):  
Selective Oxidation ◽  
Oxidation Catalyst ◽  
Highly Active
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