Electrochemical Deposition of Nickel Nanoparticles on Reduced Graphene Oxide Film for Nonenzymatic Glucose Sensing

Abstract

Electrochemical reduction and electrodeposition are two effective methods for the preparation of new nanomaterials for electrochemical sensing. In this work, the reduced graphene oxide‐nickel nanoparticles composite (RGO‐NiNPs) was synthesized using both methods mentioned above. The fabrication process was simple and easily performed. Then, the RGO‐NiNPs composite was characterized by SEM, EDS, and XRD. Furthermore, for the strong catalytic ability of the high‐valent oxyhydroxide species (NiOOH) formed in alkaline media, the composite was used as the matrix for nonenzymatic detection of glucose. Comparing with NiNPs modified glassy carbon electrode (NiNPs/GCE), the RGO‐NiNPs/GCE showed better sensitivity and stability. A low detection limit of 0.1 µM with a wide linear range from 2 µM to 2.1 mM (R=0.996) was obtained.

Enzyme-free sensing of glucose on a copper electrode modified with nickel nanoparticles and multiwalled carbon nanotubes

“…Considering the physiological concentration of glucose in blood (3.5∼6.1 mM) [24], such variations of current actually would not affect the detection of glucose. Interestingly, under this condition, UA led to the decline of the current terrace, which has been previously observed on a nickel-based glucose sensor [36]. The exact cause of such a phenomenon remains unclear, probably due to the electrostatic repulsion of negatively charged UA by nafiondecorated electrode surface in strong alkaline condition.…”

An electrochemical sensor for hydrazine and nitrite based on graphene–cobalt hexacyanoferrate nanocomposite: Toward environment and food detection

“…After several potential cycles, the cathodic current almost disappeared, indicating the electrochemical reduction of GO was fast. Additionally, no evident anodic waves were observed during the cyclic potential sweeps, suggesting such an electrochemical process was irreversible [40,43].…”

Anodic Pretreatment of Glassy Carbon: Impacts on Structural and Electrochemical Characteristics of Niox Nanoparticles

“…Glucose electro oxidation using transition metal oxides, including both bulk and nanostructures based electrodes, such as NiO x is well documented [32][33][34][35]. Nickel and nickel hydroxide are known of its excellent electrocatalytic performance in alkaline medium [36,37].…”