Also, although some oxides find specific utilization, many applications are mutual. (1−9) Mainly, nanostructured metal oxides based on copper, nickel, and zinc are efficient electrocatalysts when considering non-noble precursors (10−12) thus, materials based on these oxides are highly studied. Considering these results, NiO nanoflowers can be regarded as promising surfaces for the electrochemical determination of hydrazine, providing interesting features to explore in the electrocatalytic sensor field.Įlectrocatalytic nanomaterials have been a topic of research in the frontiers of electrochemistry, which includes their utilization in advanced applications, such as oxidation of environmental pollutants, non-enzymatic determination of organic compounds, and efficient design of fuel cells, supercapacitors, and batteries, among others. The limits of detection and quantification were 0.026 and 0.0898 μmol L –1, respectively. The electrocatalytic sensor showed a high sensitivity value of 0.10866 μA L μmol –1. In these conditions, the peak current response increased linearly with hydrazine concentration ranging from 0.99 to 98.13 μmol L –1. By cyclic voltammetry, it was possible to observe the excellent performance of the modified electrode toward hydrazine oxidation in alkaline media, providing an oxidation overpotential of only +0.08 V vs Ag/AgCl. For the production of the modified electrode, NiO nanoflowers were dispersed in Nafion and drop-cast onto the surface of a glassy carbon electrode (NiO NF/GCE). The resultant material was characterized by scanning electron microscopy, X-ray photoelectron spectroscopy, and X-ray diffraction. In this study, we report a simple protocol for the gram-scale synthesis of uniform NiO nanoflowers (approximately 1.75 g) via a hydrothermal method for highly selective and sensitive electrocatalytic detection of hydrazine. However, although innumerable electrocatalysts have been reported, their large-scale production with the same activity and sensitivity remains challenging. The design and development of efficient and electrocatalytic sensitive nickel oxide nanomaterials have attracted attention as they are considered cost-effective, stable, and abundant electrocatalytic sensors.
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