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

Gas-Phase Selective Oxidation of Benzyl Alcohol to Benzaldehyde with Molecular Oxygen over Unsupported Nanoporous Gold

ChemCatChem ◽  
2010 ◽  
Vol 2 (4) ◽  
pp. 383-386 ◽  
Author(s):  
Dongqing Han ◽  
Tingting Xu ◽  
Jixin Su ◽  
Xiaohong Xu ◽  
Yi Ding
Keyword(s):  
Benzyl Alcohol ◽  
Gas Phase ◽  
Molecular Oxygen ◽  
Selective Oxidation ◽  
Nanoporous Gold ◽  
Oxidation Of Benzyl Alcohol

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.

In-Situ Loading Ultrafine AuPd Particles on Ceria: Highly Active Catalyst for Solvent-Free Selective Oxidation of Benzyl Alcohol

Langmuir ◽  
2011 ◽  
Vol 27 (3) ◽  
pp. 1152-1157 ◽  
Author(s):  
Hongye Zhang ◽  
Yun Xie ◽  
Zhenyu Sun ◽  
Ranting Tao ◽  
Changliang Huang ◽  
...  
Keyword(s):  
Benzyl Alcohol ◽  
Selective Oxidation ◽  
Active Catalyst ◽  
Solvent Free ◽  
Highly Active ◽  
Oxidation Of Benzyl Alcohol

scholarly journals High Efficient and Stable Thiol-Modified Dendritic Mesoporous Silica Nanospheres Supported Gold catalysts for Gas-phase Selective Oxidation of Benzyl Alcohol with Ultra-Long Lifetime

2021 ◽  
Author(s):  
kun Zhang ◽  
Liu-Xi Zheng ◽  
Bo Peng
Keyword(s):  
Mesoporous Silica ◽  
Benzyl Alcohol ◽  
Gas Phase ◽  
Selective Oxidation ◽  
Silica Nanospheres ◽  
Strong Stabilization ◽  
Oxidation Of Benzyl Alcohol ◽  
High Efficient ◽  
Thiol Ligand ◽  
Mesoporous Silica Nanospheres

Thiol-modified dendritic mesoporous silica nanospheres (DMSNs) supported Au catalyst were facilely prepared and used in gas-phase selective oxidation of benzyl alcohol with O2 as the oxidant. The Au/DMSNs-4.4%SH catalyst with low loading of Au (~2%) and proper amount of thiol ligand (~4.4%) achieved high conversion of benzyl alcohol (Conv. 91%) and selectivity for benzaldehyde (Sel. 98%) and unprecedented lifetime up to 820 h at 250 °C. The dramatically increased lifetime is the consequence of the strong stabilization of active gold nanoparticles by thiol ligand and the effective mass diffusion of DMSNs with opened three-dimensional mesoporous networks.

Thin-sheet Ag/Ni-fiber catalyst for gas-phase selective oxidation of benzyl alcohol with molecular oxygen

2009 ◽  
Vol 10 (10) ◽  
pp. 1376-1379 ◽  
Author(s):  
Jiping Mao ◽  
Miaomiao Deng ◽  
Qingsong Xue ◽  
Li Chen ◽  
Yong Lu
Keyword(s):  
Benzyl Alcohol ◽  
Gas Phase ◽  
Molecular Oxygen ◽  
Selective Oxidation ◽  
Thin Sheet ◽  
Oxidation Of Benzyl Alcohol

More than oxygen vacancies: a collective crystal-plane effect of CeO2 in gas-phase selective oxidation of benzyl alcohol

2019 ◽  
Vol 9 (11) ◽  
pp. 2960-2967 ◽  
Author(s):  
Qiuyue Zhou ◽  
Chongyuan Zhou ◽  
Yuheng Zhou ◽  
Wei Hong ◽  
Shihui Zou ◽  
...  
Keyword(s):  
Benzyl Alcohol ◽  
Gas Phase ◽  
Selective Oxidation ◽  
Oxygen Vacancies ◽  
Crystal Plane ◽  
Oxidation Of Benzyl Alcohol

A collective crystal-plane effect of CeO2 involves oxygen vacancies and the ability to abstract H, adsorb O2 and remove water.

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