Electrochemical Study Of Nickel-Based Nanomaterial Modified Electrode

Among various low cost catalysts, the nickel-based materials have been the most widely utilized for the electrode materials which not only can improve the charge-discharge density, but also reveal excellent electrocatalysis. Due to their unique properties of nanomaterials, the nickel-based nanomaterials exhibit greatly improved electrochemical performance.This article focuses on the four aspects:1. In the introduction section of the article begins with a brief overview of the property and the development of nano materials; then talks the advantages and drawbacks about nano nickel and nickel compounds and what we can do for it. The methods of modifying electrode are discussed. Lastly we summarize the objectives and the contents of the research.2. Synthesis the Ni-Fe-LDHs and Ni-Al-LDHs nanocomposites are introduced respectively. Synthesis the Ni-Fe-LDHs was processed by adding the sodium hydroxide and sodium carbonate solution to the mixed solution of the nickel nitrate and potassium ferricyanide. The reaction was allowed to last2h at160℃for to get the Ni-Fe-LDHs. The similar condition was used to prepare the Ni-Al-LDHs. By the SEM and TEM we studed the morphology of nanomaterial and the results indicate that the obtained Ni-Fe-LDHs and Ni-Al-LDHs have the form of hexagonal flakes. The Ni-Fe-LDHs and Ni-Al-LDHs were modified on the glass carbon electrodes to study their electrochemical catalysis toward glucose and hydrogen peroxide. It’s found that they exhibited excellent electrocatalytic oxidation toward glucose and hydrogen peroxide. 3. Ni/Ag alloy modified electrodes were obtained by electrodeposition. The Ni/Ag alloys were electrodeposited onto the glass carbon electrode surface at-0.8V for100s with a certain ratio of Ni to Ag in1%NH3. The synergistic effect of bimetallic Ag and Ni alloys on each other’s electrocatalysis to glucose was studied. It was found that the presence of Ag and Ni in the alloy facilitates each other’s electrocatalysis toward glucose oxidation, exhibiting an interesting synergistic effect. Especially electrode, the presence of Ag improves the electrocatalytical performance of Ni at lower potential, which facilitates amperometric measurements of glucose and shows the potential to develop glucose based sensor or fuel cells.4. Metallic Bi and Ni were co-deposited onto the surface of glass carbon electrode from the electrolyte solution containing their respective nitrate. The purpose is to study the influence of Bi3+on the deposition of Ni and that of deposited Bi on the electro catalytic performance of Ni to glucose in alkali solution. The results show that both redox signal of Ni(OH)2/Ni00H and Ni(OH)2/NiOOH mediated electrocatalysis to glucose is remarkably increased in the presence of Bi. It seems that there is a synergistic effect between Bi and Ni on each other’s redox electrochemistry. The fabricated Bi/Ni-GCE was successfully employed to analyze the glucose level in blood samples, exhibiting high accuracy, strong resistance against inference and good reliability in the practical applications.