scholarly journals Ru Catalyst Supported by Magnetic Core-Shell Structured Cerium Oxide: Preparation, Characterization and Application in Green Oxidation of Benzyl Alcohol

2016 ◽  
Vol 05 (02) ◽  
pp. 27-38
Author(s):  
丽萍 孔
Keyword(s):  
Benzyl Alcohol ◽  
Cerium Oxide ◽  
Magnetic Core ◽  
Core Shell ◽  
Ru Catalyst ◽  
Oxidation Of Benzyl Alcohol ◽  
Green Oxidation

Magnetic Core–Shell Nanostructured Palladium Catalysts for Green Oxidation of Benzyl Alcohol

2016 ◽  
Vol 146 (7) ◽  
pp. 1321-1330 ◽  
Author(s):  
Liping Kong ◽  
Chengcheng Wang ◽  
Feilong Gong ◽  
Weidong Zhu ◽  
Yijun Zhong ◽  
...  
Keyword(s):  
Benzyl Alcohol ◽  
Palladium Catalysts ◽  
Magnetic Core ◽  
Core Shell ◽  
Oxidation Of Benzyl Alcohol ◽  
Green 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.

ZIF-derived porous carbon supported Pd nanoparticles within mesoporous silica shells: sintering- and leaching-resistant core–shell nanocatalysts

2017 ◽  
Vol 53 (68) ◽  
pp. 9490-9493 ◽  
Author(s):  
Shaolong Zhang ◽  
Aijuan Han ◽  
Yanliang Zhai ◽  
Jian Zhang ◽  
Weng-Chon Cheong ◽  
...  
Keyword(s):  
Catalytic Activity ◽  
Mesoporous Silica ◽  
Benzyl Alcohol ◽  
Porous Carbon ◽  
Pd Nanoparticles ◽  
Core Shell ◽  
Oxidation Of Benzyl Alcohol ◽  
Supported Pd

We prepared sintering- and leaching-resistant core–shell nanocatalysts which exhibited excellent catalytic activity and recyclability for oxidation of benzyl alcohol.

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