Catalytic Performance of MnOx Nanorods in Aerobic Oxidation of Benzyl Alcohol

Catalytic aerobic oxidation of benzyl alcohol (BnOH) to benzaldehyde (PhCHO) over supported noble metal catalysts has grabbed the attention of researchers due to the critical role of PhCHO in numerous industrial syntheses. In the present study, a novel catalyst, Pd-P alloy supported on aminopropyl-functionalized mesoporous silica (NH2-SiO2), was prepared through in situ reduction and characterized by BET-BJH analysis, SEM, TEM, XRD, FTIR, TG-DTA, and XPS. Chemical properties and catalytic performance of Pd-P/NH2-SiO2 were compared with those of Pd0 nanoparticles (NPs) deposited on the same support. Over Pd-P/NH2-SiO2, the BnOH conversion to PhCHO was much higher than over Pd0/NH2-SiO2, and significantly influenced by the nature of solvent, reaching 57% in toluene at 111 °C, with 63% selectivity. Using pure oxygen as an oxidant in the same conditions, the BnOH conversion increased up to 78%, with 66% selectivity. The role of phosphorous in improving the activity may consist of the strong interaction with Pd that favours metal dispersion and lowers Pd electron density.

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Insights into the nature of alumina-supported MnOOH and its catalytic performance in the aerobic oxidation of benzyl alcohol

Catalysis Communications ◽

10.1016/j.catcom.2009.01.011 ◽

2009 ◽

Vol 10 (7) ◽

pp. 1122-1126 ◽

Cited By ~ 39

Author(s):

Qinghu Tang ◽

Xiaonan Gong ◽

Chengming Wu ◽

Yuanting Chen ◽

Armando Borgna ◽

...

Keyword(s):

Benzyl Alcohol ◽

Aerobic Oxidation ◽

Catalytic Performance ◽

Oxidation Of Benzyl Alcohol

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Synthesis of Palladium and Copper Nanoparticles Supported on TiO2 for Oxidation Solvent-Free Aerobic Oxidation of Benzyl Alcohol

Processes ◽

10.3390/pr9091590 ◽

2021 ◽

Vol 9 (9) ◽

pp. 1590

Author(s):

Hamed M. Alshammari

Keyword(s):

Benzyl Alcohol ◽

Photoelectron Spectroscopy ◽

Aerobic Oxidation ◽

Catalytic Performance ◽

X Ray ◽

Oxidation Of Benzyl Alcohol ◽

Transmission Electron ◽

Bimetallic Nanostructures ◽

Catalyst Reusability ◽

Low Activity

The use of metal oxides as supports for palladium and copper (Pd–Cu) nanoalloys constitutes a new horizon for improving new active catalysts in very important reactions. From the literatures, Pd-based bimetallic nanostructures have great properties and active catalytic performance. In this work, nanostructures of titanium dioxide (TiO2) were used as supports for Pd–Cu nanoparticles catalysts. Palladium and copper were deposited on these supports using the sol-immobilisation method. The composite nanoalloys were characterized using transmission electron microscopy (TEM) and X-ray photoelectron spectroscopy (XPS). The catalyst was evaluated for the oxidation of benzyl alcohol. The effect of the Cu–Pd ratio using sol-immobilization methods supported on TiO2 was investigated. The results show that monometallic Cu/TiO2 was observed to have a low activity. However, as soon as the catalyst contained any palladium, the activity increased with a significant increase in the selectivity towards isomerization products. The influence of support and temperature were investigated. Furthermore, the catalyst reusability was also tested for oxidation of benzyl alcohol reactions, by repeatedly performing the same reaction using the recovered catalyst. The Pd–Cu/TiO2 catalyst displayed better reusability even after several reactions

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RuO 2 supported NaY zeolite catalysts: Effect of preparation methods on catalytic performance during aerobic oxidation of benzyl alcohol

Solid State Sciences ◽

10.1016/j.solidstatesciences.2017.08.022 ◽

2017 ◽

Vol 72 ◽

pp. 150-155 ◽

Cited By ~ 4

Author(s):

Dasom Jung ◽

Sunwoo Lee ◽

Kyungsu Na

Keyword(s):

Benzyl Alcohol ◽

Aerobic Oxidation ◽

Catalytic Performance ◽

Zeolite Catalysts ◽

Nay Zeolite ◽

Preparation Methods ◽

Oxidation Of Benzyl Alcohol

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High Performance Cu2 O–CoO/SiC Nanocomposites for Gas-Phase Oxidation of Benzyl Alcohol to Benzaldehyde

Nanoscience and Nanotechnology Letters ◽

10.1166/nnl.2019.2937 ◽

2019 ◽

Vol 11 (5) ◽

pp. 664-669

Author(s):

Xiaodong Dai ◽

Chunjian Hu ◽

Huanrong Liu

Keyword(s):

Benzyl Alcohol ◽

Gas Phase ◽

High Performance ◽

Aerobic Oxidation ◽

Catalytic Performance ◽

Oxidation Of Benzyl Alcohol ◽

Phase Oxidation ◽

Reaction Performance ◽

Gas Phase Oxidation ◽

Alcohol Conversion

High-performance CoO–Cu2 O/SiC is prepared for the gas-phase aerobic oxidation of benzyl alcohol of benzaldehyde, which delivers much higher catalytic performance (92% benzyl alcohol conversion and 99% selectivity at 260 °C) than the solo CoO/SiC and Cu2 O/SiC. TEM image indicates that the small size CoO and Cu2 O nanoparticles are homogeneously distributed on the support. Control experiments indicate that Cu2 O–CoO interfaces are responsible for their better reaction performance.

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

Nanotechnology Reviews ◽

10.1515/ntrev-2012-0085 ◽

2014 ◽

Vol 3 (1) ◽

pp. 99-110 ◽

Cited By ~ 2

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.

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