By a News Reporter-Staff News Editor at Science Letter -- Current study results on Enzymes and Coenzymes have been published. According to news reporting originating from Galway, Ireland, by NewsRx correspondents, research stated, "Co-immobilisation of three separate multiple blue copper oxygenases, a Myceliophthora thermophila laccase, a Streptomyces coelicolor laccase and a Myrothecium verrucaria bilirubin oxidase, with an [Os(2,2'-bipyridine)2 (polyvinylimidazole)10Cl](+/2+) redox polymer in the presence of multi-walled carbon nanotubes (MWCNTs) on graphite electrodes results in enzyme electrodes that produce current densities above 0.5 mA cm(-2) for oxygen reduction at an applied potential of 0 V versus Ag/AgCl. Fully enzymatic membraneless fuel cells are assembled with the oxygen-reducing enzyme electrodes connected to glucose-oxidising anodes based on co-immobilisation of glucose oxidase or a flavin adenine dinucleotide-dependent glucose dehydrogenase with an [Os(4,4'-dimethyl-2,2'-bipyridine)2(polyvinylimidazole)10Cl](+/2+) redox polymer in the presence of MWCNTs on graphite electrodes."
Our news editors obtained a quote from the research from National University, "These fuel cells can produce power densities of up to 145 ?W cm(-2) on operation in pH 7.4 phosphate buffer solution at 37 °C containing 150 mM NaCl, 5 mM glucose and 0.12 mM O2. The fuel cells based on Myceliophthora thermophila laccase enzyme electrodes produce the highest power density if combined with glucose oxidase-based anodes."
According to the news editors, the research concluded: "Although the maximum power density of a fuel cell of glucose dehydrogenase and Myceliophthora thermophila laccase enzyme electrodes decreases from 110 ?W cm(-2) in buffer to 60 ?W cm(-2) on testing in artificial plasma, it provides the highest power output reported to date for a fully enzymatic glucose-oxidising, oxygen-reducing fuel cell in artificial plasma."
For more information on this research see: Membraneless glucose/oxygen enzymatic fuel cells using redox hydrogel films containing carbon nanotubes. Chemphyschem, 2013;14(10):2302-7. (Wiley-Blackwell - www.wiley.com/; Chemphyschem - onlinelibrary.wiley.com/journal/10.1002/(ISSN)1439-7641)
The news editors report that additional information may be obtained by contacting D. MacAodha, School of Chemistry & Ryan Institute, National University of Ireland Galway, University Road, Galway, Ireland. Additional authors for this research include P. O Conghaile, B. Egan, P. Kavanagh and D. Leech (see also Enzymes and Coenzymes).
Keywords for this news article include: Galway, Europe, Ireland, Laccase, Alcohols, Hydrogel, Chalcogens, Fullerenes, Nanotechnology, Oxidoreductases, Carbon Nanotubes, Organic Chemicals, Polyethylene Glycols, Emerging Technologies, Enzymes and Coenzymes.
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