Effect of Ag-Doping on the Catalytic Activity of Polymer-Stabilized Au Clusters in Aerobic Oxidation of Alcohol

2007 ◽  
Vol 111 (13) ◽  
pp. 4885-4888 ◽  
Author(s):  
Nirmalya K. Chaki ◽  
Hironori Tsunoyama ◽  
Yuichi Negishi ◽  
Hidehiro Sakurai ◽  
Tatsuya Tsukuda
Keyword(s):  
Catalytic Activity ◽  
Aerobic Oxidation ◽  
Ag Doping ◽  
Au Clusters ◽  
Polymer Stabilized

The design and catalytic performance of molybdenum active sites on an MCM-41 framework for the aerobic oxidation of 5-hydroxymethylfurfural to 2,5-diformylfuran

2019 ◽  
Vol 9 (3) ◽  
pp. 811-821 ◽  
Author(s):  
Zhao-Meng Wang ◽  
Li-Juan Liu ◽  
Bo Xiang ◽  
Yue Wang ◽  
Ya-Jing Lyu ◽  
...  
Keyword(s):  
Catalytic Activity ◽  
Active Sites ◽  
Aerobic Oxidation ◽  
Catalytic Performance ◽  
Mcm 41

The catalytic activity decreases as –(SiO)3Mo(OH)(O) > –(SiO)2Mo(O)2 > –(O)4–MoO.

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.

A novel copper(ii)–lanthanum(iii) metal organic framework as a selective catalyst for the aerobic oxidation of benzylic hydrocarbons and cycloalkenes

2016 ◽  
Vol 6 (11) ◽  
pp. 3727-3736 ◽  
Author(s):  
P. Cancino ◽  
A. Vega ◽  
Andrea Santiago-Portillo ◽  
Sergio Navalon ◽  
Mercedes Alvaro ◽  
...  
Keyword(s):  
Catalytic Activity ◽  
Metal Organic Framework ◽  
Aerobic Oxidation ◽  
Selective Catalyst ◽  
Pyridinedicarboxylic Acid ◽  
Metal Organic ◽  
Organic Framework

The synthesis and catalytic activity of a novel heteronuclear CuII and LaIII metal organic framework (MOF) having pyridinedicarboxylic acid (CuLa-MOF) is reported.

Exposure to air boosts CuAAC reactions catalyzed by PEG-stabilized Cu nanoparticles

2017 ◽  
Vol 53 (39) ◽  
pp. 5384-5387 ◽  
Author(s):  
Fangyu Fu ◽  
Angel Martinez ◽  
Changlong Wang ◽  
Roberto Ciganda ◽  
Luis Yate ◽  
...  
Keyword(s):  
Catalytic Activity ◽  
Aerobic Oxidation ◽  
Cu Nanoparticles

The catalytic activity of Cu(0) NPs is boosted upon aerobic oxidation, forming Cu2O NPs, and further improved on an SBA-15 support.

scholarly journals Engineering Active Sites in Reduced Graphene Oxide: Tuning the Catalytic Activity for Aerobic Oxidation

2019 ◽  
Vol 7 (19) ◽  
pp. 15948-15956 ◽  
Author(s):  
Juan C. Espinosa ◽  
Mercedes Álvaro ◽  
Amarajothi Dhakshinamoorthy ◽  
Sergio Navalón ◽  
Hermenegildo García
Keyword(s):  
Graphene Oxide ◽  
Catalytic Activity ◽  
Reduced Graphene Oxide ◽  
Active Sites ◽  
Aerobic Oxidation ◽  
Reduced Graphene

Effect of Electronic Structures of Au Clusters Stabilized by Poly(N-vinyl-2-pyrrolidone) on Aerobic Oxidation Catalysis

2009 ◽  
Vol 131 (20) ◽  
pp. 7086-7093 ◽  
Author(s):  
Hironori Tsunoyama ◽  
Nobuyuki Ichikuni ◽  
Hidehiro Sakurai ◽  
Tatsuya Tsukuda
Keyword(s):  
Electronic Structures ◽  
Aerobic Oxidation ◽  
Oxidation Catalysis ◽  
Au Clusters

scholarly journals Aerobic Oxidation of 5-Hydroxymethylfurfural over Ag Nanoparticle Catalysts Stabilized by Polyvinylpyrrolidone with Different Molecular Weights

Nanomaterials ◽  
2020 ◽  
Vol 10 (9) ◽  
pp. 1624
Author(s):  
Haian Xia ◽  
Jiahuan An ◽  
Weizi Zhang
Keyword(s):  
Catalytic Activity ◽  
Photoelectron Spectroscopy ◽  
Catalytic Properties ◽  
Aerobic Oxidation ◽  
Ag Nps ◽  
Oxidation Activity ◽  
X Ray ◽  
Remarkable Effect ◽  
Molecular Weights ◽  
Metal Support Interaction

The metal–support interaction (MSI) has a remarkable effect on the catalytic properties, but how to precisely modulate its degree remains a huge challenge. Herein, polyvinylpyrrolidone (PVP) with three different molecular weights (MWs) (24, 58, and 130 kDa) was used as a capping agent to fabricate Ag nanoparticles (NPs) supported on ZrO2. The physiochemical properties of the catalysts were characterized by X-ray diffraction (XRD), Transmission Electron Microscope (TEM), X-ray Photoelectron Spectroscopy (XPS), and Fourier transform infrared (FT-IR) techniques. The impacts of MSI on the catalytic activity and reaction kinetics for aerobic oxidation of 5-hydroxymethylfurfural (HMF) were investigated. The results showed that the introduction of PVP with various MWs could efficiently tailor the interfacial interactions and charge transfers (CT) among PVP, the support, and Ag NPs, thereby affecting the oxidation activity of HMF. The turnover number (TON) for HMF oxidation decreases in the order of unsupported colloidal Ag clusters > Ag/ZrO2 (58,000) > Ag/ZrO2 (130,000) > Ag/ZrO2 (24,000) > Ag/ZrO2. The reason for this large difference in the catalytic activity for HMF oxidation is that various MWs of PVP result in a change of MSI, thereby facilitating CT from PVP to Ag metal sites. This study offers a new strategy for modulating MSI by varying the MW of capping agents, thereby tuning the catalytic properties in the oxidation of HMF.

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