A new biosynthesis of CuCo₂S₄ nanoparticles as a high‐performance supercapacitor electrode and excellent non‐enzymatic hydrazine sensor

Abstract

In this work, we report the biosynthesis of CuCo2S4 nanoparticles (Bio‐NPs) via hydrothermal method. The synthetized Bio‐NPs‐CuCo2S4 was studied as an active material of working electrode for electrochemical supercapacitor and non‐enzymatic hydrazine sensor. The Bio.NPs‐CuCo2S4/ITO electrode has a specific capacitance of 264 F/g at a current density of 1 A/g. Meanwhile, the electrode exhibits excellent electrochemical performances, such as an energy density of 33 Wh/Kg and a power density of 900 W/Kg. The Bio.NPs‐CuCo2S4/ITO electrode for non‐enzymatic hydrazine sensor exhibits a very high sensitivity of 2400 μA.mM−1.cm−2, a wide linear range from 0.001 to 1.400 mM and shows an excellent selectivity.