Nitrogen containing carbons

Nitrogen-containing carbon replicas of SBA-15 and MLV prepared from pyrrole as carbon precursor... 

In the present work, a different technique (pyrrole polimerisation and carbonisation) has been applied to prepare nitrogen-containing carbons from mesoporous materials. The influence of iron present in the matrix skeletons, introduced by impregnating the matrices with FeCl3, on the properties of the carbon replicas has been evaluated. 

The nitrogen-containing carbon replicas of MLV-0.75 exhibit a poorer structure ordering as compared to the carbons obtained from sucrose. It is in contrast to the CMK-3 samples as replicas of SBA-15. The OCM carbons contain up to 6.5% N whereas CMK-3, up to 5%. Probably, the removal of nitrogen during carbonisation proceeds from hexagonal structures easier than from onion-like ones. In the OCM samples, the amount of the used FeCh determines their structure ordering. 

Polymers have served roles in PEM fuel cell cathodes such as modifiers to macrocycle-based electrodes to improve conductivity and stability,165 composite materials with heteropolyacids,166 and as precursors to pyrolyzed catalysts.38,112,132,133 However, as discussed in the previous section, the activity of nitrogen-containing carbon raises the possibility of non-metal electrodes functioning in a cathode environment. Likewise, researchers have noted ORR activity for various conducting polymers containing nitrogen, and recently studies on their potential use in PEM fuel cell cathodes have been reported. 

Lahaye J, Nanse G, Bagreev A, Strelko V (1999) Porous structure and surface chemistry of nitrogen containing carbons from polymers. Carbon 37(4) 585-590... 

B) Yudasaka, M. Kikuchi. R. Ohki, Y. Yoshimura, S. Nitrogen-containing carbon nanotube growth from Ni-phthalocyanine by chemical vapor deposition Carbon 1997, 35, 195. 

Synthesis of heterogeneous base catalysts nitrogen containing carbon nanotubes... 

Evidently, understanding of the reaction mechanisms and the nature of the cat-alytically active sites is of considerable importance for possible practical applications. Interest in carbon-catalyzed oxidation reactions and in nitrogen-containing carbons has increased considerably in recent years. 

Chemical vapor deposition (CVD) has been used to obtain deposits of nitrogen-containing carbon on the surface of other carbon materials. A helium stream with an added aromatic compound such as benzene [28] or pyridine... 

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