Preparation and catalytic properties of Pd nanoparticles supported on micro-crystal DUT-67 MOFs

RSC Advances ◽  
2015 ◽  
Vol 5 (41) ◽  
pp. 32714-32719 ◽  
Author(s):  
Gui-lin Zhuang ◽  
Jia-qi Bai ◽  
Li Tan ◽  
Hong-liang Huang ◽  
Yi-fen Gao ◽  
...  
Keyword(s):  
Catalytic Properties ◽  
Suzuki Coupling ◽  
Pd Nanoparticles ◽  
Catalytic Performance ◽  
Nitrobenzene Hydrogenation ◽  
Hydrogenation Reactions

The obtained Pd/DUT-67 composites exhibited high catalytic performance in Suzuki coupling and nitrobenzene hydrogenation reactions.

Graphene hydrogel supported palladium nanoparticles as an efficient and reusable heterogeneous catalysts in the transfer hydrogenation of nitroarenes using ammonia borane as a hydrogen source

2018 ◽  
Vol 90 (2) ◽  
pp. 327-335 ◽  
Author(s):  
Paria Eghbali ◽  
Bilal Nişancı ◽  
Önder Metin
Keyword(s):  
Heterogeneous Catalysts ◽  
Pd Nanoparticles ◽  
Ammonia Borane ◽  
Catalytic Performance ◽  
Transfer Hydrogenation ◽  
Bet Surface Area ◽  
Tandem Reactions ◽  
One Pot ◽  
Hydrogenation Reactions ◽  
Catalytic Cycles

Abstract Addressed herein is a facile one-pot synthesis of graphene hydrogel (GHJ) supported Pd nanoparticles (NPs), namely Pd-GHJ nanocomposites, via a novel method that comprises the combination of hydrothermal treatment and polyol reduction protocols in water. The structure Pd-GHJ nanocomposites were characterized by TEM, HR-TEM, XRD, XPS, Raman spectroscopy and BET surface area analysis. Then, Pd-GHJ nanocomposites were used as a heterogeneous catalysts in the tandem dehydrogenation of ammonia borane and hydrogenation of nitroarenes (Ar–NO2) to anilines (Ar–NH2) in the water/methanol mixture at room temperature. A variety of Ar–NO2 derivatives (total 9 examples) were successfully converted to the corresponding Ar–NH2 by the help of Pd-GHJ nanocomposites catalyzed tandem reactions with the conversion yields reaching up to 99% in only 20 min reaction time. Moreover, Pd-GHJ nanocomposites were demonstrated to be the reusable catalysts in the tandem reactions by preserving their initial catalytic performance after five consecutive catalytic cycles. It is believed that the presented synthesis protocol for the Pd-GHJ nanocomposites and the catalytic tandem hydrogenation reactions will make a significant contribution to the catalysis and synthetic organic chemistry fields.

scholarly journals Influence of the Reduction Temperature and the Nature of the Support on the Performance of Zirconia and Alumina-Supported Pt Catalysts for n-Dodecane Hydroisomerization

Catalysts ◽  
2021 ◽  
Vol 11 (1) ◽  
pp. 88
Author(s):  
Diana García-Pérez ◽  
Maria Consuelo Alvarez-Galvan ◽  
Jose M. Campos-Martin ◽  
Jose L. G. Fierro
Keyword(s):  
Catalytic Activity ◽  
Surface Area ◽  
Catalytic Properties ◽  
Catalytic Performance ◽  
Major Influence ◽  
Pt Catalysts ◽  
Reduction Temperature ◽  
Metal Dispersion ◽  
Tungsten Oxides ◽  
Supported Pt Catalysts

Catalysts based on zirconia- and alumina-supported tungsten oxides (15 wt % W) with a small loading of platinum (0.3 wt % Pt) were selected to study the influence of the reduction temperature and the nature of the support on the hydroisomerization of n-dodecane. The reduction temperature has a major influence on metal dispersion, which impacts the catalytic activity. In addition, alumina and zirconia supports show different catalytic properties (mainly acid site strength and surface area), which play an important role in the conversion. The NH3-TPD profiles indicate that the acidity in alumina-based catalysts is clearly higher than that in their zirconia counterparts; this acidity can be attributed to a stronger interaction of the WOx species with alumina. The PtW/Al catalyst was found to exhibit the best catalytic performance for the hydroisomerization of n-dodecane based on its higher acidity, which was ascribed to its larger surface area relative to that of its zirconia counterparts. The selectivity for different hydrocarbons (C7–10, C11 and i-C12) was very similar for all the catalysts studied, with branched C12 hydrocarbons being the main products obtained (~80%). The temperature of 350 °C was clearly the best reduction temperature for all the catalysts studied in a trickled-bed-mode reactor.

PtPd nanoframes derived from Pd@PdPt core–shell rhombic dodecahedrals with excellent catalytic performance toward methanol oxidation

2021 ◽  
Author(s):  
Yangyang Ren ◽  
Chuanliang Li ◽  
Baosong Li ◽  
Fan Gao ◽  
Xinghua Zhang ◽  
...  
Keyword(s):  
Methanol Oxidation ◽  
Catalytic Properties ◽  
Catalytic Performance ◽  
Core Shell ◽  
Acid Environment ◽  
Excellent Catalytic Performance

PtPd nanoframes with excellent catalytic properties were obtained by etching Pd@PdPt core–shell RDs with Fe3+ in an acid environment.

Effect of Ions Substitution on Nanospace La-Fe-O Catalytic Properties for Simultaneous Removal of NOx and Soot

2013 ◽  
Vol 740 ◽  
pp. 565-569
Author(s):  
Xiao Xiao Meng ◽  
Mao Xiang Jing ◽  
Feng Lin He ◽  
Xiang Qian Shen
Keyword(s):  
High Performance ◽  
Catalytic Properties ◽  
Catalytic Performance ◽  
Dip Coating ◽  
Exhaust Emission ◽  
Simultaneous Removal ◽  
Microstructural Characteristics ◽  
Coating Method ◽  
Citrate Gel Process ◽  
Dip Coating Method

The catalysts La0.8K0.2FeO3(LKFO), La0.8K0.2Fe0.7Mn0.3O3(LKFMO) and La0.8K0.2Fe0.67Mn0.3Pt0.03O3(LKFMPO) were prepared by the citrate-gel process and the catalyst-coated honeycomb ceramic devices were prepared by the citrate-gel assisted dip-coating method. All the catalysts have a high performance on the simultaneous removal of NOxand soot at a temperature range of 200 to 400°C under the practical diesel exhaust emission. The obvious catalytic improvement is largely due to the effects of ions substitution, pore structure and microstructural characteristics of the catalysts. The catalytic performance order is LKFMPO > LKFMO > LKFO. Among them the LKFMPO catalyst shows the best catalytic properties, especially in the removal of NOx, with a maximum conversion rate of NOx(21.2%).

Synthesis of Task-specific Imidazolium-based Porous Triazine Polymer Decorated with Ultrafine Pd Nanoparticles toward Alcohol Oxidation

2021 ◽  
Author(s):  
Yannan Mao ◽  
Yongqing Shi ◽  
Yatao Su ◽  
Qi Shen ◽  
Yuangong Zhang ◽  
...  
Keyword(s):  
Catalyst Support ◽  
Alcohol Oxidation ◽  
Pd Nanoparticles ◽  
Catalytic Performance

The properties of catalyst support can greatly affect the catalytic performance. Therefore, it is very important to design and synthesize the catalyst support purposefully. Herein, a series of imidazolium-linked porous...

Fabrication of Au–Pd nanoparticles/graphene oxide and their excellent catalytic performance

2014 ◽  
Vol 51 ◽  
pp. 397-401 ◽  
Author(s):  
Yongqiang He ◽  
Nana Zhang ◽  
Lei Zhang ◽  
Qiaojuan Gong ◽  
Maocong Yi ◽  
...  
Keyword(s):  
Graphene Oxide ◽  
Pd Nanoparticles ◽  
Catalytic Performance ◽  
Excellent Catalytic Performance
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