Electrochemical behavior of inorganic–organic hybrid polyoxometalate ((Cys)₃[PW₁₂O₄₀]) nanostructure self-assembled monolayer on polycrystalline gold electrode surfaces

Abstract

The synergistic effect of HPW and Cys enhanced electrochemical activity of Au-(Cys)PW electrode.

Electrochemical investigation and amperometry determination iodate based on ionic liquid/polyoxotungstate/P-doped electrochemically reduced graphene oxide multi-component nanocomposite modified glassy carbon electrode

“…at the interface of the modied GCEs depends on the electronic structure and thickness of the modier. 27 As shown in Fig. 7A, curve a displays an intact pair of redox peaks at the bare GCE with a DE p 102 mV and i pc 2.18 mA in Fe(CN) 6 3À/4À solution in 10 mmol L À1 PBS (pH 3) containing 0.1 mol L À1 KCl.…”

“…2,[12][13][14] The multiple redox properties make them attractive candidates in surface modication, electroanalysis, and electrocatalysis. 2,[13][14][15] Different methods have been developed to achieve chemically modied electrodes (CMEs) with POMs such as electrodeposition at a very negative potential, 16,17 adsorption, 18 entrapment into conducting, 19,20 or non-conducting polymers matrixes, 21,22 layer-by-layer self-assembly, 23,24 Langmuir-Blodgett (LB) technique, 25,26 preparation of self-assembled monolayer and multilayer thin-lms, 27 and bulk modication of carbon composites and carbon paste matrices. 28 However, the electrocatalytic activity of POMs-modied electrodes is limited due to their low stability in aqueous solutions 15,27,29 and low specic surface area.…”

“…30 To achieve the enhanced stability of POMs, many studies have been focused on the design and construction of modifying and assemble POMs with suitable organic matrices, which is one of the most exciting elds in the materials chemistry. 27,[31][32][33] Recently, ionic liquids (ILs) have concerned more attention, [34][35][36] due to owning highlight properties such as good aqueous solubility, high electrical conductivity, non-volatility, non-ammability, low toxicity, high thermal and electrochemical stabilities, and large electrochemical potential window. 37 Furthermore, immobilization or dispersion of POMs on different supporting carbon materials has attracted signicant attention due to their small background currents, wide potential windows, low-cost, excellent chemical stability, and a strong affinity for POMs.…”

Polyoxometalates‐Based Ionic Liquids (POMs‐ILs) for Electrochemical Applications

“…Their potential has been explored in catalysis (namely in desulfurization, esterification, production of ketones, asymmetric di‐hydroxylation of olefins, in CO 2 conversion, in anti‐corrosion, antibacterial and antimicrobial coatings, and as photoluminescence materials . Concerning their electrochemical properties, POMs‐ILs have been prepared and studied as electrochromic materials for modification of carbon composite electrodes, for selective determination of ascorbic acid based on modified glassy carbon electrodes and towards the oxidation of the NADH coenzyme, for catalytic reduction of nitrite, bromate and hydrogen peroxide using a modified carbon paste electrodes, for electroluminescence as good electron‐ transport, as reversible phase transformation ionic‐liquid‐type gels, as new hybrid gel electrolytes, for the modification of polycrystalline gold electrode, as well as for high performance Li−S battery cathode …”

Crystal Structure and Reversible Photochromism of Pb(II)‐N,N‐Dimethylformamide Modified Keggin‐Type Polyoxometalates

“…In recent years, photochromic materials have attracted much attention of researchers because of their potential applications in many fields, such as optical switching, information storage, nano machines, ink‐free printing, chemical sensors, and even biology . Polyoxometalates (POMs), as metal oxide clusters formed by self‐assembly of early transitional metal (e.g., W, Mo, V, Nb, and Ta) salt at different pH solutions, can be widely used in medicine, catalysis, electrochemistry, and sensors, due to their redox properties, acidity, and diversity in composition and structures . It is worth mentioning here that POMs, as inorganic materials, have also been applied in the study of solid‐state photochromic materials .…”