Pyrrolic nitrogen-doped carbon nanotubes: physicochemical properties, interactions with Pd and their role in the selective hydrogenation of nitrobenzophenone

RSC Advances ◽  
2015 ◽  
Vol 5 (1) ◽  
pp. 109-122 ◽  
Author(s):  
Lucy M. Ombaka ◽  
Patrick G. Ndungu ◽  
Vincent O. Nyamori
Keyword(s):  
Carbon Nanotubes ◽  
Catalytic Activity ◽  
Physicochemical Properties ◽  
Selective Hydrogenation ◽  
Selective Synthesis ◽  
Nitrogen Doped ◽  
Nitrogen Doped Carbon

The selective synthesis of pyrrolic N-CNTs, which promote the catalytic activity, and selectivity of PdN/CNTs used to hydrogenate nitrobenzophenone.

scholarly journals Using nitrogen-doped carbon nanotubes as a catalyst support for selective hydrogenation of cinnamaldehyde

2017 ◽  
Vol 20 (K1) ◽  
pp. 20-27
Author(s):  
Truong Huu Tri ◽  
Nguyen Dinh Lam
Keyword(s):  
Electron Microscopy ◽  
Carbon Nanotubes ◽  
Selective Hydrogenation ◽  
Photoelectron Spectroscopy ◽  
Catalyst Support ◽  
Chemical Vapor ◽  
Active Phase ◽  
Chemical Vapor Deposition Method ◽  
Nitrogen Doped ◽  
Nitrogen Doped Carbon

Nitrogen-doped carbon nanotubes (N-CNTs) has been applied in different areas for over two last decade thanks to their novel properties. In this work, N-CNTs were produced by using chemical vapor deposition method, this material was used as catalyst support for nanoparticles paladi (Pd) catalyst. The support and catalyst Pd/N-CNTs were characterized by several techniques including Raman spectrum, X-ray photoelectron spectroscopy (XPS), nitrogen adsorption - desorption isotherms (BET), scanning electron microscopy (SEM) and transmission electron microscopy (TEM). The catalyst was tested for the selective hydrogenation of cinnamaldehyde (CAL), The result of this study shows that the catalyst Pd/N-CNTs exhibits a high selectivity towards the C=C bond, over 91% of hydrocinnamaldehyde (HCAL) obtained at about 70% of CAL conversion. The obtained results also show that the present nitrogen atoms in the carbon architecture and functional groups of oxygen in the N-CNTs material have altered the surface properties, as enhancing the dispersion and anchoring active phase on the surface of the support.

Transition metals (Fe, Co, and Ni) encapsulated in nitrogen-doped carbon nanotubes as bi-functional catalysts for oxygen electrode reactions

2016 ◽  
Vol 4 (5) ◽  
pp. 1694-1701 ◽  
Author(s):  
Yanyan Liu ◽  
Hongliang Jiang ◽  
Yihua Zhu ◽  
Xiaoling Yang ◽  
Chunzhong Li
Keyword(s):  
Carbon Nanotubes ◽  
Catalytic Activity ◽  
Carbon Nanotube ◽  
Transition Metal ◽  
Oxygen Electrode ◽  
Transition Metal Nanoparticles ◽  
Nitrogen Doped ◽  
Catalytic Activities ◽  
Electrode Reactions ◽  
Nitrogen Doped Carbon

Transition metal nanoparticles (Fe, Co, and Ni) encapsulated in N-doped carbon nanotube hybrids were prepared, and the catalytic activities of three catalysts are compared and discussed. The optimized Co/N-CNT catalyst exhibits superb bifunctional catalytic activity with a ΔEvalue of 0.78 V.

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