PdO/CuO Nanoparticles on Zeolite-Y for Nitroarene Reduction and Methanol Oxidation

2019 ◽  
Vol 2 (6) ◽  
pp. 3769-3779 ◽  
Author(s):  
Mukesh Sharma ◽  
Biraj Das ◽  
Anil Hazarika ◽  
Ankur K. Guha ◽  
Suresh K. Bhargava ◽  
...  
Keyword(s):  
Methanol Oxidation ◽  
Zeolite Y ◽  
Cuo Nanoparticles ◽  
Nitroarene Reduction

Rotating disk slurry electrodeposition of platinum at Y-zeolite/carbon Vulcan XC-72R for methanol oxidation in alkaline media

RSC Advances ◽  
2015 ◽  
Vol 5 (10) ◽  
pp. 7637-7646 ◽  
Author(s):  
Amal Suleiman ◽  
Christian L. Menéndez ◽  
Ramón Polanco ◽  
Esteban Rosim Fachini ◽  
Yaritza Hernández-Lebrón ◽  
...  
Keyword(s):  
Methanol Oxidation ◽  
Zeolite Y ◽  
Rotating Disk ◽  
Alkaline Media ◽  
Y Zeolite ◽  
Electrode Technique

Platinum was electrodeposited onto Y-zeolite and Y-zeolite (Y)/Vulcan XC-72R (V) to produce Pt/Y/V and Pt/Y catalysts using a rotating disk slurry electrode technique.

Cu(OH)2-Ni(OH)2 engulfed by zeolite-Y hydroxyl nest and multiwalled carbon nanotube for effective methanol oxidation reaction

2021 ◽  
Vol 397 ◽  
pp. 139313
Author(s):  
Nazimul Hoque ◽  
Manash J. Baruah ◽  
Seonghwan Lee ◽  
Young-Bin Park ◽  
Rupjyoti Dutta ◽  
...  
Keyword(s):  
Carbon Nanotube ◽  
Methanol Oxidation ◽  
Oxidation Reaction ◽  
Zeolite Y ◽  
Multiwalled Carbon Nanotube ◽  
Methanol Oxidation Reaction ◽  
Multiwalled Carbon

Surface roughness measurements of vanadium-contaminated fluidized cracking catalysts by atomic force microscopy

1996 ◽  
Vol 54 ◽  
pp. 866-867
Author(s):  
H. Kinney ◽  
M.L. Occelli ◽  
S.A.C. Gould
Keyword(s):  
Surface Roughness ◽  
Zeolite Y ◽  
Atomic Level ◽  
Microporous Structure ◽  
Contact Mode ◽  
Force Microscopy ◽  
Atomic Force ◽  
Before And After ◽  
Roughness Measurements ◽  
Cracking Catalysts

For this study we have used a contact mode atomic force microscope (AFM) to study to topography of fluidized cracking catalysts (FCC), before and after contamination with 5% vanadium. We selected the AFM because of its ability to well characterize the surface roughness of materials down to the atomic level. It is believed that the cracking in the FCCs occurs mainly on the catalysts top 10-15 μm suggesting that the surface corrugation could play a key role in the FCCs microactivity properties. To test this hypothesis, we chose vanadium as a contaminate because this metal is capable of irreversibly destroying the FCC crystallinity as well as it microporous structure. In addition, we wanted to examine the extent to which steaming affects the vanadium contaminated FCC. Using the AFM, we measured the surface roughness of FCCs, before and after contamination and after steaming.We obtained our FCC (GRZ-1) from Davison. The FCC is generated so that it contains and estimated 35% rare earth exchaged zeolite Y, 50% kaolin and 15% binder.

Effects of Microwave-synthesizing Parameters on Structure and Electro-catalytic Activity of Pt2Mo/C towards Methanol Oxidation

2010 ◽  
Vol 25 (4) ◽  
pp. 359-364 ◽  
Author(s):  
Xin ZENG ◽  
Xian-Xia YUAN ◽  
Xiao-Yun XIA ◽  
Juan DU ◽  
Hui-Juan ZHANG ◽  
...  
Keyword(s):  
Catalytic Activity ◽  
Methanol Oxidation ◽  
Electro Catalytic Activity

SO3H-functionalized Zeolite-Y as an Efficient Nanocatalyst for the Synthesis of Nbenzimidazole- 2-aryl-4-thiazolidinones and tri-substituted Imidazoles

2020 ◽  
Vol 17 (2) ◽  
pp. 117-130 ◽  
Author(s):  
Mehdi Kalhor ◽  
Zohre Zarnegar ◽  
Zahra Seyedzade ◽  
Soodabeh Banibairami
Keyword(s):  
Zeolite Y ◽  
Internal Standard ◽  
Acid Catalyst ◽  
Aromatic Aldehydes ◽  
Reaction Rates ◽  
Ambient Conditions ◽  
Catalytic Method ◽  
Efficient Catalyst ◽  
Bet Analysis ◽  
Ft Ir

Background: SO3H-functionalized zeolite-Y was prepared and used as a catalyst for the synthesis of 2-aryl-N-benzimidazole-4-thiazolidinones and tri-substituted imidazoles at ambient conditions. Objective: The goals of this catalytic method include excellent yields and high purity, inexpensive procedure and ease of product isolation, the use of nontoxic and heterogeneous acid catalyst, shorter reaction times and milder conditions. Materials and Methods: NMR spectra were recorded on Brucker spectrophotometer using Me4Si as internal standard. Mass spectra were recorded on an Agilent Technology 5975C VL MSD with tripe-axis detector. FTIR spectra were obtained with KBr disc on a galaxy series FT-IR 5000 spectrometer. The surface morphology of nanostructures was analyzed by FE-SEM (EVO LS 10, Zeiss, Carl Zeiss, Germany). BET analysis were measured at 196 °C by a Japan Belsorb II system after the samples were vacuum dried at 150°C overnight. Results: The NSZ was characterized by FT-IR, FESEM, EDX, XRF, and BET. The catalytic activity of NSZ was investigated for synthesis of 1,3-tiazolidin-4-ones in H2O/Acetone at room temperature. Moreover, NSZ was used for synthesis of tri-substituted imidazoles at 60 °C via solvent-free condensation. Different kinds of aromatic aldehydes were converted to the corresponding of products with good to excellent yields. Conclusion: Sulfonated zeolite-Y was as an efficient catalyst for the preparation of N-benzimidazole-2-aryl-1,3- thiazolidin-4-ones and 2,4,5-triaryl-1H-imidazoles. High reaction rates, elimination toxic solvent, simple experimental procedure and reusability of the catalyst are the important features of this protocol.

Synthesis, Physicochemical Characterizations and Antimicrobial Activity of CuO Nanoparticles

2018 ◽  
Vol 3 (2) ◽  
pp. 121-125
Author(s):  
Bhumika K. Sharma ◽  
Kinjal Patel ◽  
Debesh R. Roy
Keyword(s):  
Antimicrobial Activity ◽  
Cuo Nanoparticles

Mn-Mo-O Catalysts for Methanol Oxidation. I. Preparation and Characterization of the Catalysts

1992 ◽  
Vol 57 (12) ◽  
pp. 2529-2538 ◽  
Author(s):  
Krasimir Ivanov ◽  
Penka Litcheva ◽  
Dimitar Klissurski
Keyword(s):  
Methanol Oxidation ◽  
Solution Concentration ◽  
Alkaline Media ◽  
Acidic Media ◽  
Chemical Methods ◽  
X Ray ◽  
Ph Values ◽  
Precipitate Composition

Mn-Mo-O catalysts with a different Mo/Mn ratio have been prepared by precipitation. The precipitate composition as a function of solution concentration and pH was studied by X-ray, IR, thermal and chemical methods. Formation of manganese molybdates with MnMoO4.1.5H2O, Mn3Mo3O12.2.5H2O, and Mn3Mo4O15.4H2O composition has been supposed. It is concluded that pure MnMoO4 may be obtained in both acid and alkaline media, the pH values depending on the concentration of the initial solutions. The maximum Mo/Mn ratio in the precipitates is 1.33. The formation of pure Mn3Mo4O15.4H2O is possible in weakly acidic media. This process is favoured by increasing the concentration of initial solutions.

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