Ultrasonic-assisted synthesis of Pd–Ni alloy catalysts supported on multi-walled carbon nanotubes for formic acid electrooxidation

2011 ◽  
Vol 56 (19) ◽  
pp. 6860-6865 ◽  
Author(s):  
Ruoshi Li ◽  
Zhen Wei ◽  
Tao Huang ◽  
Aishui Yu
Keyword(s):  
Carbon Nanotubes ◽  
Formic Acid ◽  
Ni Alloy ◽  
Ultrasonic Assisted ◽  
Multi Walled Carbon Nanotubes ◽  
Walled Carbon Nanotubes ◽  
Alloy Catalysts ◽  
Formic Acid Electrooxidation

Hydrogen Storage Properties of Mg-Ni Alloy Catalysed by Multi-Walled Carbon Nanotubes

2010 ◽  
Vol 654-656 ◽  
pp. 2843-2846
Author(s):  
Sima Aminorroaya ◽  
Hua Kun Liu
Keyword(s):  
Carbon Nanotubes ◽  
Hydrogen Storage ◽  
Cast Sample ◽  
Storage Performance ◽  
Milled Sample ◽  
Ni Alloy ◽  
Multi Walled Carbon Nanotubes ◽  
Hydrogen Storage Performance ◽  
Walled Carbon Nanotubes ◽  
Storage Properties

The hydrogen storage performance of ball-milled sample of cast Mg-6 wt% Ni alloy was investigated. Morphology and microstructure of the cast sample and achieved powders were evaluated by high-resolution scanning electron microscopy. The activation characteristics of ball-milled alloy are compared with those of the materials obtained by ball-milling of 5 wt% multi-walled carbon nanotubes (MWCNTs) for 2 hours. MWCNTs enhanced the absorption kinetics considerably. The hydrogen content of modified powder by MWCNTs reached to the maximum hydrogen capacity within two minutes of exposure to hydrogen at 370°C and 2MPa pressure. The evidence is provided that nucleation and growth of hydrides accelerate drastically by homogenously distribution of MWCNTs on the surface of ball-milled powders.

Development of Pd and Pd–Co catalysts supported on multi-walled carbon nanotubes for formic acid oxidation

2010 ◽  
Vol 195 (2) ◽  
pp. 461-465 ◽  
Author(s):  
D. Morales-Acosta ◽  
J. Ledesma-Garcia ◽  
Luis A. Godinez ◽  
H.G. Rodríguez ◽  
L. Álvarez-Contreras ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Formic Acid ◽  
Formic Acid Oxidation ◽  
Acid Oxidation ◽  
Co Catalysts ◽  
Multi Walled Carbon Nanotubes ◽  
Walled Carbon Nanotubes

Synergistic effect of graphene and multi-walled carbon nanotubes composite supported Pd nanocubes on enhancing catalytic activity for electro-oxidation of formic acid

2016 ◽  
Vol 6 (13) ◽  
pp. 4794-4801 ◽  
Author(s):  
Ammar Bin Yousaf ◽  
M. Imran ◽  
Akif Zeb ◽  
Xiao Xie ◽  
Kuang Liang ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Catalytic Activity ◽  
Fuel Cells ◽  
Synergistic Effect ◽  
Formic Acid ◽  
Multi Walled Carbon Nanotubes ◽  
Electro Oxidation ◽  
Walled Carbon Nanotubes ◽  
Formic Acid Fuel Cells ◽  
Supported Pd

Synergistic effect of rGO/MWCNTs composite supported Pd nanocubes enhanced the performance of direct formic acid fuel cells.

Investigation of Surfactant Type, Dosage and Ultrasonication Temperature Control on Dispersity of Metal-Coated Multi-Walled Carbon Nanotubes

2016 ◽  
Vol 16 (4) ◽  
pp. 4224-4232
Author(s):  
Xiaoning Liang ◽  
Wei Li
Keyword(s):  
Carbon Nanotubes ◽  
Oleic Acid ◽  
Sodium Dodecyl ◽  
Sodium Dodecyl Benzene Sulfonate ◽  
Negative Effects ◽  
Ultrasonic Dispersion ◽  
Dispersion Process ◽  
Ultrasonic Assisted ◽  
Multi Walled Carbon Nanotubes ◽  
Walled Carbon Nanotubes

We studied the dispersity of multi-walled carbon nanotubes (MWNTs) combined with different metallic particles (Ni and Fe). An ultrasonic-assisted water-bath dispersion process was used to disperse the metal-coated MWNTs in different solutions and the dispersity was measured using an ultraviolet-visible spectrophotometer. The dispersity and morphology of the MWNTs were characterized using field-emission scanning electron microscopy (FE-SEM) together with digital image processing technology. Effects of dispersant type (sodium dodecyl benzene sulfonate (SDBS), oleic acid, and polymer (TNEDIS)) and surfactant dosage on the dispersity of the metal-coated MWNTs were investigated under controlled and uncontrolled temperatures and results were compared with those from the untreated MWNTs. The results showed that the negative effects of temperature on the ultrasonic dispersion process could be eliminated through a temperature-controlled system. Moreover, the TNEDIS, SDBS, and oleic acid were arranged in the descending order of the dispersion effect degree. The untreated MWNTs, Ni-coated MWNTs, and Fe-coated MWNTs were arranged in the descending degree of dispersity order. Since the metal coating makes the MWNTs harder and more fragile, the metal-coated MWNTs are more likely to fracture during the ultrasonic dispersion process.

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