Electrochemical behavior of nickel tetraazamacrocyclic complexes incorporated into carbon paste electrodes: Application in H2O2 electrocatalysis

Immobilized ferrocene and glucose oxidase on titanium(IV) oxide grafted onto a silica gel surface and its application as an amperometric glucose biosensor

“…in contrast, the nature of the anion presents a significant effect, i.e., the midpoint potential shifts towards more positive values in the order perchlorate > chloride > nitrate > acetate = phosphate, according to the results listed in Table 2. Similar behavior was observed for nickel tetrazacomplexes by Taraszewska et al [22], who correlated the potential shift to the anion penetration capacity into the carbon paste and interaction with the [a] The concentrations were 0.1 rnol L-l and the anion was chloride, using a scan rate of I O~V S -' . [a] The concentrations were 0.1 rnol L-' and the cation was sodium.…”

Influence of Metal Nanoparticles on the Electrocatalytic Oxidation of Glucose by Poly(NiIIteta) Modified Electrodes

“…This type of electrode modification allows the electrocatalyst to be dispersed at the molecular level with good activity towards many electrocatalytic reactions [7 -28]. Complexes of nickel, in a square-planar arrangement, show a high catalytic activity towards the oxidation of several compounds like H 2 O 2 [14,15], methanol [16,17,18], other simple alcohols [19,26], ascorbic acid [20], derivatives of phenol [10], formaldehyde [21], glucose [23,24], hydrazine [25] and others [22]. Other nickel based CMEs were also used in the electrocatalytic oxidations of alcohols and glycine [22,27,28].…”

A series of new polyoxometalate-based metal–organic complexes with different rigid pyridyl-bis(triazole) ligands: assembly, structures and electrochemical properties

“…6a-c and 7a-c, with the addition of hydrogen peroxide or bromate, the reduction peak currents of 1-, 2-and 5-CPEs increase gradually and the corresponding oxidation peak currents gradually decrease, which indicate that the 1-, 2-and 5-CPEs possess good electrocatalytic activity toward the reduction of hydrogen peroxide and bromate and the reduction products are H 2 O and Br À , respectively. 33,34 As can be seen from Fig. 8a-c, with the addition of AA, the oxidation peak currents of 1-, 2-and 5-CPEs gradually increase, which suggests that 1-, 2-and 5-CPEs present excellent electrocatalytic activities for the oxidation of AA and the oxidation product is g-lactone.…”