Preparation of Keggin-Type H3−xMx[PW11CrO40]/SiO2 (M = Co or Fe) and Their Catalytic Activity in Oxidation of Benzyl Alcohol

2021 ◽  
Author(s):  
Farnoosh Ghaffarzadeh Anari ◽  
Hamid Reza Aghabozorg ◽  
Shahrbanoo Fouladi
Keyword(s):  
Catalytic Activity ◽  
Benzyl Alcohol ◽  
Keggin Type ◽  
Oxidation Of Benzyl Alcohol

scholarly journals Influence of Co-Precipitation Agent on the Structure, Texture and Catalytic Activity of Au-CeO2 Catalysts in Low-Temperature Oxidation of Benzyl Alcohol

Catalysts ◽  
2021 ◽  
Vol 11 (5) ◽  
pp. 641
Author(s):  
Lukasz Wolski ◽  
Grzegorz Nowaczyk ◽  
Stefan Jurga ◽  
Maria Ziolek
Keyword(s):  
Gold Nanoparticles ◽  
Catalytic Activity ◽  
Low Temperature ◽  
Benzyl Alcohol ◽  
Low Temperature Oxidation ◽  
Temperature Oxidation ◽  
Oxidation Of Benzyl Alcohol ◽  
Key Factor ◽  
Au Particle Size ◽  
Co Precipitation

The aim of the study was to establish the influence of a co-precipitation agent (i.e., NaOH–immediate precipitation; hexamethylenetetramine/urea–gradual precipitation and growth of nanostructures) on the properties and catalytic activity of as-synthesized Au-CeO2 nanocomposites. All catalysts were fully characterized with the use of XRD, nitrogen physisorption, ICP-OES, SEM, HR-TEM, UV-vis, XPS, and tested in low-temperature oxidation of benzyl alcohol as a model oxidation reaction. The results obtained in this study indicated that the type of co-precipitation agent has a significant impact on the growth of gold species. Immediate co-precipitation of Au-CeO2 nanostructures with the use of NaOH allowed obtainment of considerably smaller and more homogeneous in size gold nanoparticles than those formed by gradual co-precipitation and growth of Au-CeO2 nanostructures in the presence of hexamethylenetetramine or urea. In the catalytic tests, it was established that the key factor promoting high activity in low-temperature oxidation of benzyl alcohol was size of gold nanoparticles. The highest conversion of the alcohol was observed for the catalyst containing the smallest Au particle size (i.e., Au-CeO2 nanocomposite prepared with the use of NaOH as a co-precipitation agent).

On the selective aerobic oxidation of benzyl alcohol with Pd/Au-nanoparticles in batch and flow

2014 ◽  
Vol 3 (1) ◽  
pp. 99-110 ◽  
Author(s):  
Hannes Alex ◽  
Norbert Steinfeldt ◽  
Klaus Jähnisch ◽  
Matthias Bauer ◽  
Sandra Hübner
Keyword(s):  
Catalytic Activity ◽  
Benzyl Alcohol ◽  
Aerobic Oxidation ◽  
X Ray ◽  
X Ray Scattering ◽  
Oxidation Of Benzyl Alcohol ◽  
Transmission Electron ◽  
Vis Spectroscopy ◽  
Selective Aerobic Oxidation

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.

Selective oxidation of benzyl alcohol to benzaldehyde with H2O2 in water on epichlorohydrin-modified Fe3O4 microspheres

2015 ◽  
Vol 39 (6) ◽  
pp. 4924-4932 ◽  
Author(s):  
Shiwei Xiao ◽  
Chuntao Zhang ◽  
Rong Chen ◽  
Fengxi Chen
Keyword(s):  
Catalytic Activity ◽  
Benzyl Alcohol ◽  
Selective Oxidation ◽  
Title Reaction ◽  
Enhancing Effect ◽  
Oxidation Of Benzyl Alcohol ◽  
Fe3o4 Microspheres

The enhancing effect of modification by epichlorohydrin on the catalytic activity of Fe3O4 microspheres in the title reaction was theoretically and experimentally confirmed.

Enhancing Catalytic Activity of Mn3O4 by Selective Liquid Phase Oxidation of Benzyl Alcohol

2018 ◽  
Vol 10 (11) ◽  
pp. 1095-1099
Author(s):  
S. Narayanan ◽  
N. Mohamed Faizee ◽  
P. Paramasivam ◽  
A. Meera Moydeen ◽  
C. Ragupathi ◽  
...  
Keyword(s):  
Catalytic Activity ◽  
Liquid Phase ◽  
Benzyl Alcohol ◽  
Liquid Phase Oxidation ◽  
Oxidation Of Benzyl Alcohol ◽  
Phase Oxidation

Correlation of thermal conductivity with the catalytic activity of nanoparticles: the oxidation of benzyl alcohol

2020 ◽  
Vol 130 (1) ◽  
pp. 289-302
Author(s):  
Saima Sadiq ◽  
Muhammad Sadiq ◽  
Khalid Saeed ◽  
Najeeb Ur Rehman ◽  
Qaisar Ali
Keyword(s):  
Thermal Conductivity ◽  
Catalytic Activity ◽  
Benzyl Alcohol ◽  
Oxidation Of Benzyl Alcohol
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