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https://doi.org/10.37358/Rev.Chim.1949

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Revista de Chimie (Rev. Chim.), Year 2007, Volume 58, Issue 5,





NADH Electrocatalytic Oxidation at Glassy Carbon Paste Electrodes Modified with Meldola Blue Adsorbed on alpha-Titanium Phosphate


Abstract:

Basic electrochemistry of glassy carbon paste electrodes (GCPEs) modified with Meldola Blue adsorbed on crystalline a-titanium phosphate (MB-a-TP) electrodes and their ability to catalyze the NADH oxidation have been investigated. Various ratios of glassy carbon (Sigradur K) to MB-a-TP, were used to obtain GCPEs. Cyclic voltammetry (CV) and rotating disc electrode (RDE) measurements, performed in Tris buffer solution, showed that: (1) the MB formal potential vs. pH dependence is linear; (2) the addition of polyethyleneimine (PEI) to the paste electrode has a significant beneficial effect on the electrooxidation of NADH. As a general conclusion, it can be stated that GCPEs modified with MB-a-TP and incorporating 2.44% (w/w) PEI exhibits the best behavior for NADH electrocatalytic oxidation. Keywords: NADH oxidation, modified glassy carbon paste electrodes, electrocatalysis, a-titanium phosphate, redox dyes.


Issue: 2007, Volume 58, Issue 5
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