Abstract
A voltage-facilitated immobilization procedure for phenazine methosulphate (PMS) and phenazine ethosulphate (PES) on graphite electrodes is described. The graphite is immersed in a solution of PMS or PES and a voltage of 1.1 V vs. SCE is applied for 15 min. The surface coverage was 5×10 −9 mol cm −2. At pH 7.0 the E 1/2 for immobilized PMS (−160 mV) and PES (−210 mV) were the same as for the soluble compounds. The modified electrodes catalysed electron transfer from dihydronicotinamide adenine dinucleotide (NADH). Linear sweep voltammetry produced anodic peaks of the NADH oxidation at −50 mV (PMS electrode) and −100 mV (PES electrode). The electrochemical step was faster than the preceding chemical step involving a reaction between NADH and the immobilized PMS or PES.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callMore From: Journal of Electroanalytical Chemistry and Interfacial Electrochemistry
Disclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
