Abstract
Cobalt N-doped carbon (Co–NC) and palladium (Pd) nanoparticles were used to modify the CPE, which served as a platform for sensing the NADH. The use of this sensor offered the advantages of improved electrochemical stability, simple fabrication, and low cost. Here, we present a straightforward, accurate, and sensitive approach for measuring NADH in neutral PBS utilizing an electrochemically altered carbon paste electrode. The synthesized materials have been characterized using HR-SEM, TEM, and XPS. Electroanalytical approaches like Cyclic voltammetry, Amperometry titration, and EIS have been carried out to check out the activity of the modified electrode. The modified electrode becomes more electroactive towards NADH oxidation due to the interaction of Co–NC/Pd with dimethyl ferrocene, with a notable reduction in the peak potential difference occurring despite electrode fouling. The sensor has a high electrocatalytic response and a detection limit of 2 µM throughout a broad linear range up to 5 to 1250 µM with a correlation coefficient of 0.989.
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Acknowledgements
The author thanks the Indian Institute of Technology (B.H.U.), Varanasi for providing TAship (Teaching Assistantship) for carrying out this research work. All authors thank to the Head of the Department and Prof. P.C. Pandey for providing an electrochemical workstation facility in the Department.
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KS contributed to conceptualization, material preparation, data collection, formal analysis, visualization, and writing the original draft. CS and KKM have done data collection, validation, writing, and MM contributed to project administration, resources, and supervision. All authors read and approved the final manuscript.
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Singh, K., Singh, C., Maurya, K.K. et al. Redox electrochemistry of electrodes tuned with dimethyl ferrocene based on Co–NC–Pd nanogeometry: an impedimetric sensor for NADH sensing. J Mater Sci: Mater Electron 34, 1898 (2023). https://doi.org/10.1007/s10854-023-11257-1
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DOI: https://doi.org/10.1007/s10854-023-11257-1