A novel electrochemical high-performance non-enzymatic glucose sensor based on Face-centred cubic FeCoNiMnCr high entropy nano alloys grafted NCNTs

High entropy alloys (HEAs) have gained sweeping attention in recent years in terms of their excellent mechanical properties, corrosion resistance and so on but is fairly less projected in terms of their electrochemical sensing properties. Here in we are reporting a FeCoNiMnCr HEA based non enzymatic glucose sensor along with its comprehensive OER kinetic studies both experimentally and theoretically. As an electrochemical glucose sensor FeCoNiMnCr HEA showed a lower concentration detection limit, high sensitivity and with a fast response time of 40 seconds along with its good stability and selectivity. The morphological and physiochemical structure of HEA NCNTs were majorly characterised through transmission electron microscopy (TEM), field emission scanning electron microscopy (FESEM), powder X-ray diffraction (PXRD), Raman spectroscopy, X-ray photoelectron spectroscopy (XPS), inductively coupled mass spectroscopy (ICPMS), Brunauer-Emmett-Teller (BET) surface area measurements. This material was also employed as an electrocatalyst for oxygen evolution reaction (OER) to explore the common active sites involved in both these oxidation reactions