Results of electrochemical anodic oxidation of multi-walled carbon nanotubes in 80% sulfuric acid are presented. Using X-ray diffraction analysis, electron microscopy, and Raman spectra, it has been proven that, as a result of anodic oxidation, partially unzipped multi-walled carbon nanotubes were obtained by anodic oxidation. It is shown that the degree of unzipping multi-walled carbon nanotubes depends on the time of electrochemical oxidation of these materials. Using the oxygen electrode as testing electrodes was shown the dependence of the electrochemical characteristics of these materials of the degree of unzipping the multi-walled carbon nanotubes. It is suggested that the controlled synthesis of partially unzipping nanotubes is possible. It is also suggested that it is possible to estimate the degree of unzipping the nanotube based on the study of the electrochemical characteristics of oxygen electrodes. By the electrochemical method obtained partially unzipped multi-walled carbon nanotubes which are promising electrode materials.

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A series of first-, second-, and third-generation dendronic triazolo-pyridazinones were synthesized in good yields via the Cu I -catalyzed azide-alkyne cycloaddition reactions of 4,6-diphenyl-2-(prop-2-yn-1-yl)pyridazin-3(2H)-one, possessing a terminal alkyne functional group with aromatic mono-and diazides with long alkyl and chiral glycol side-chain substituents. The chemical structures of the new compounds were characterized using different spectroscopic methods. The morphology of the dendrons was examined using the scanning electron microscope (SEM) analysis, which revealed the formation of highly ordered nanofiber and nanorod aggregations, directed by π-stacking interactions and van der Waals forces. Graphical abstractKeywords Dendron · Azide-alkyne cycloaddition · Self-assembly · Pyridazin-3(2H)-one · Nanofiber · Nanorod

We report on facile method of graphene nanoplatelets synthesis by electrochemical method using multi‐walled carbon nanotubes (MWCNTs). For the synthesis procedure we utilize standard redox potential of the carbon atom belonging to carboxyl groups. The graphene oxide was obtained by anodic oxidation of MWCNTs in 80% sulfuric acid at optimum oxidation potential +3.0 V for 4 h. The subsequent electrochemical reduction of the obtained material was carried out in an alkaline medium. The successful electrochemical production of the graphene nanoplatelets from MWCNTs was confirmed by different experimental techniques, in particular TEM, XRD, XPS, XES, FTIR and Raman spectroscopy. The current‐voltage characteristics of the oxygen electrodes produced from the electrochemically obtained graphene nanoplatelets were investigated. It was shown that the graphene nanoplatelets produced by electrochemical method is a promising material for fuel cell electrodes.

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