Immobilization of [Cu(bpy)2]Br2 complex onto a glassy carbon electrode modified with α-SiMo12O404− and single walled carbon nanotubes: Application to nanomolar detection of hydrogen peroxide and bromate

Formation of a robust and stable film comprising ionic liquid and polyoxometalate on glassy carbon electrode modified with multiwalled carbon nanotubes: Toward sensitive and fast detection of hydrogen peroxide and iodate

“…The average values of k s for three redox pairs I-I , II-II and III-III are 53.8 (±0.8), 51.8 (±0.6), 51.8 (±1.2) s −1 , respectively assuming n = 2 for each pair. These high values for k s indicate that PMo 12 behaves as an excellent electron transfer mediator in the combined MWCNTs and [C 8 Py][PF 6 ] matrix in comparison with PMo 12 modified carbon ionic liquid electrode [48] and glassy carbon electrode modified with carbon nanotubes and SiMo 12 [35]. …”

“…Combination of carbon nanotubes and polyoxometalates gives the opportunity to increase functionality and performance of POMs as an electrocatalyst in the area of chemically modified electrodes [9,[29][30][31][32][33][34][35][36].…”

Hybrid materials utilizing polyelectrolyte-derivatized carbon nanotubes and vanadium-mixed addenda heteropolytungstate for efficient electrochemical charging and electrocatalysis

“…9 a) contribute to the overall activity, but the electrocatalytic current was maximized when mixed-valent W (V, VI) redox centers were generated within the polytungstate structure. The typical reduction mechanism described for various types of Keggin and Dawson polyoxometalates [9,26,[33][34][35][36][37] (Fig. 9 c).…”

“…It is noteworthy that up to now a large portion (ca. 80 %) of POM applications concentrated on their electrocatalytic features, particularly with respect to induced electroactivity of such inert inorganic reactants [9,26,[33][34][35][36][37] as bromate, chlorate, nitrite, hydrogen peroxide (reductions) or ascorbic acid, NADH, and L-cysteine (oxidations). POMs were also reported to have a beneficial effect on oxygen reduction process [28].…”

“…A high anionic charge of POM layers or adsorbates permits their application as linking agents during fabrication of three-dimensional network films consisted of anionic and cationic species interconnected via simple electrostatic interactions. This layer-by-layer concept was applied to the formation of POM-based hybrid films containing conducting polymers [20][21][22][23], positively charged organics like poly(vinylpyridine) or poly(ethylenimine) [24] and transition metal (Fe, Ru, Os, Cu) complexes [2,[25][26][27].…”