Highly efficient Cu(ii)-pyrazoledicarboxylate heterogeneous catalysts for a base-free aerobic oxidation of benzylic alcohol to benzaldehyde with hydrogen peroxide as the oxidant

2020 ◽  
Vol 49 (23) ◽  
pp. 7758-7765
Author(s):  
Mei-Ling Cheng ◽  
Meng-Na Qin ◽  
Lin Sun ◽  
Lu Liu ◽  
Qi Liu ◽  
...  

A Cu(ii)-pyrazoledicarboxylate MOF displayed high activity and selectivity in the base-free oxidation of benzyl alcohol to benzaldehyde combined with H2O2.

2020 ◽  
Vol 10 (9) ◽  
pp. 2786-2796
Author(s):  
Shanhui Zhu ◽  
Yanyan Chen ◽  
Xiaoqing Gao ◽  
Zexiang Lv ◽  
Yue He ◽  
...  

S and O co-doped graphene derived from lignin carbonization achieved 95.9% yield of benzaldehyde in metal-free oxidation of benzyl alcohol.


2018 ◽  
Vol 8 (17) ◽  
pp. 4463-4473 ◽  
Author(s):  
Pengbo Hao ◽  
Mingjie Zhang ◽  
Wei Zhang ◽  
Zhiyang Tang ◽  
Ni Luo ◽  
...  

Polyoxometalate-based Gemini ionic hybrids with inherent phase transfer capability are highly efficient and recyclable catalysts in the selective oxidation of alcohols with H2O2 in water.


Author(s):  
Sarhan Sanaa Tareq ◽  
Mohd. Izham Saiman ◽  
Taufiq-Yap Yun Hin ◽  
Abdul Halim Abdullah ◽  
Umer Rashid

The solvent free oxidation of benzyl alcohol was conducted employing Au and Pd supported catalysts, while utilizing hydrogen peroxide 35% (H2O2) as the oxidant, H2O2 is  very cheap, mild, and an environment friendly reagent, which produced water as the only by-product. Various proportions of Au-Pd catalysts on carbon and titanium oxide activated as supports were synthesized through the use of sol immobilization catalyst synthesis technique. Characterization of the synthesized catalysts was performed using X-Ray Diffraction (XRD), Brunauer-Emmett-Teller (BET), Field Emission Scanning Electron Microscopy (FESEM), and Transmission Electron Microscopy (TEM). It was found that the synthesized Au-Pd/ activated carbon catalyst was  beneficial for the solvent free oxidation of benzyl alcohol after its containing high surface area measuring 871 m2g-1. Analysis of the TEM data and particle dimension revealed smaller and narrower particle size of 1 wt%. Thus, the distribution of Au-Pd/C was attained. Carbon-supported bimetallic catalysts presented a higher conversion compared to catalysts that are supported titanium oxide (TiO2) for for the oxidation reaction of benzyl alcohol. It was determined that this technique was a suitable process for catalyst synthesis with high selectivity, same distribution of the particle size and activations. Copyright © 2018 BCREC Group. All rights reservedReceived: 8th May 2017; Revised: 22nd February 2018; Accepted: 6th March 2018; Available online: 11st June 2018; Published regularly: 1st August 2018How to Cite: Sanaa Tareq, S., Saiman, M.I., Yun Hin, T.Y., Abdullah, A.H., Rashid, U. (2018). The Impact of Hydrogen Peroxide as An Oxidant for Solvent-free Liquid Phase Oxidation of Benzyl Alcohol using Au-Pd Supported Carbon and Titanium Catalysts. Bulletin of Chemical Reaction Engineering & Catalysis, 13 (2): 373-385 (doi:10.9767/bcrec.13.2.1204.373-385) 


2020 ◽  
Vol 132 (44) ◽  
pp. 19671-19677
Author(s):  
Danyang Feng ◽  
Yangbo Dong ◽  
Liangliang Zhang ◽  
Xin Ge ◽  
Wei Zhang ◽  
...  

2018 ◽  
Vol 54 (65) ◽  
pp. 8991-8994 ◽  
Author(s):  
Zhouyang Long ◽  
Liming Sun ◽  
Weijie Zhu ◽  
Guojian Chen ◽  
Xiaochen Wang ◽  
...  

Metal-free P-doped carbon catalysts are constructed for highly efficient aerobic oxidation of benzyl alcohol to benzaldehyde in water under air.


2014 ◽  
Vol 3 (1) ◽  
pp. 99-110 ◽  
Author(s):  
Hannes Alex ◽  
Norbert Steinfeldt ◽  
Klaus Jähnisch ◽  
Matthias Bauer ◽  
Sandra Hübner

AbstractNanoparticles (NP) have specific catalytic properties, which are influenced by parameters like their size, shape, or composition. Bimetallic NPs, composed of two metal elements can show an improved catalytic activity compared to the monometallic NPs. We, herein, report on the selective aerobic oxidation of benzyl alcohol catalyzed by unsupported Pd/Au and Pd NPs at atmospheric pressure. NPs of varying compositions were synthesized and characterized by UV/Vis spectroscopy, transmission electron microscopy (TEM), and small-angle X-ray scattering (SAXS). The NPs were tested in the model reaction regarding their catalytic activity, stability, and recyclability in batch and continuous procedure. Additionally, in situ extended X-ray absorption fine structure (EXAFS) measurements were performed in order to get insight in the process during NP catalysis.


2013 ◽  
Vol 162 ◽  
pp. 365 ◽  
Author(s):  
Qian He ◽  
Peter J. Miedziak ◽  
Lokesh Kesavan ◽  
Nikolaos Dimitratos ◽  
Meenakshisundaram Sankar ◽  
...  

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