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Researchers at University of Bucharest Release New Data on Chalcogens (Effect of different chemical modification of carbon nanotubes for the oxygen...

September 2, 2014



Researchers at University of Bucharest Release New Data on Chalcogens (Effect of different chemical modification of carbon nanotubes for the oxygen reduction reaction in alkaline media)

By a News Reporter-Staff News Editor at Life Science Weekly -- Researchers detail new data in Chalcogens. According to news reporting originating in Magurele, Romania, by NewsRx journalists, research stated, "The electrochemical reduction of oxygen on chemically modified multi-walled carbon nanotubes (CNTs) electrodes in 1 M KOH solution has been studied using the rotating ring disc electrode (RDE). The surface modification of CNTs has been estimated by XPS and Raman spectroscopy."

The news reporters obtained a quote from the research from the University of Bucharest, "The effect of different oxygen functionalities on the surface of carbon nanotube for the oxygen reduction reaction (ORR) is considered in terms of the number of electrons (n) involved. Electrochemical studies indicate that in the case of the modification of CNTs with citric acid and diazonium salts the n values were close to two in the measured potential range, and the electrochemical reduction is limited to the production of peroxide as the final product. In the case of the modification of carbon nanotubes with peroxymonosulphuric acid, in the measured potential range, then value is close to 4 indicating the four-electron pathway for the ORR."

According to the news reporters, the research concluded: "By correlating ORR measurements with the XPS analysis, we propose that the increase in electrocatalytic activity towards the ORR, for CNT can be attributed to the increase in C-O groups on the surface of CNTs after modification with peroxymonosulphuric acid."

For more information on this research see: Effect of different chemical modification of carbon nanotubes for the oxygen reduction reaction in alkaline media. Electrochimica Acta, 2014;135():428-438. Electrochimica Acta can be contacted at: Pergamon-Elsevier Science Ltd, The Boulevard, Langford Lane, Kidlington, Oxford OX5 1GB, England (see also Chalcogens).

Our news correspondents report that additional information may be obtained by contacting A. Dumitru, Univ Bucharest, Dept. of Phys, Polymer Sci Grp, Magurele 077125, Romania. Additional authors for this research include M. Mamlouk and K. Scott.

Keywords for this news article include: Europe, Romania, Magurele, Chemistry, Chalcogens, Fullerenes, Nanotechnology, Electrochemical, Carbon Nanotubes, Emerging Technologies

Our reports deliver fact-based news of research and discoveries from around the world. Copyright 2014, NewsRx LLC


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Source: Life Science Weekly


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