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Researchers from University of Tulsa Discuss Findings in Chalcogens

February 21, 2014

By a News Reporter-Staff News Editor at Energy Weekly News -- Current study results on Chalcogens have been published. According to news reporting originating from Tulsa, Oklahoma, by VerticalNews correspondents, research stated, "Based on the known ability of perfluorodecalin/perfluorohydrocarbons to enhance oxygen solubility we modified oxygen sensitive biocathode by adding perfluorinated components to the catholite. This procedure improved the efficiency of the oxygen sensitive cathodes."

Our news editors obtained a quote from the research from the University of Tulsa, "Glassy carbon electrodes covered with single-wall carbon nanotubes (SWCNTs) with covalently bonded perfluoroaromatic groups were shown to be more sensitive to oxygen, and higher catalytic reduction currents were observed using laccase modified biocathodes allowing to improve the performance of bioelectrodes for fuel cells and oxygen monitoring devices. Maximum current and power density was found for the glucose/oxygen fuel cell composed of anode modified with side-aminoethylated SWCNTs conjugated with glucose dehydrogenase and cathode covered with side-perfluorophenylated SWCNTs and laccase. The open circuit potential of this cell is 0.57 +/- 0.05 V and the maximum power density is 0.865 +/- 0.090 mW/cm(2). In case of applications of biofuel cells in the biological media, in order to avoid addition of NAD+ to the solution, we propose binding this cofactor to the aminoethylated SWCNTs. For applications of this biofuel cell in biological media, we propose binding NAD(+) cofactor to the aminoethylated SWCNTs instead of its addition to the electrolyte."

According to the news editors, the research concluded: "The power output 0.226 +/- 0.031 mW/cm(2) of such cell is somewhat smaller but still satisfactory, and the open circuit potential is 0.65 +/- 0.08 V."

For more information on this research see: Fluoroaromatic substituents attached to carbon nanotubes help to increase oxygen concentration on biocathode in biosensors and biofuel cells. Electrochimica Acta, 2013;112():403-413. Electrochimica Acta can be contacted at: Pergamon-Elsevier Science Ltd, The Boulevard, Langford Lane, Kidlington, Oxford OX5 1GB, England.

The news editors report that additional information may be obtained by contacting M. Karaskiewicz, Univ Tulsa, Dept. of Chem & Biochem, Tulsa, OK 74104, United States. Additional authors for this research include J.F. Biernat, J. Rogalski, K.P. Roberts and R. Bilewicz.

Keywords for this news article include: Tulsa, Energy, Biofuel, Oklahoma, Biosensing, Chalcogens, Fullerenes, Oil and Gas, United States, Bioengineering, Carbon Nanotubes, Bionanotechnology, Nanobiotechnology, Emerging Technologies, North and Central America

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Source: Energy Weekly News

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