Electrocatalytic reduction of nitrite by copper complexes of 1,10-phenanthroline and 2,2′:6′,2″-terpyridine

Electrochemical properties and electrocatalytic activity of FAD immobilized onto cobalt oxide nanoparticles: Application to nitrite detection

“…The detection limit (signal to noise of 3) and sensitivity were 0.2 lM and 10.5 nA/lM, respectively. The detection limit, linear calibration range and sensitivity for nitrite determination at this modified electrode are comparable and even better than those obtained by using other modified electrodes [25][26][27][28][29][30][31]22,[32][33][34][35][36][37]60,61]. In addition, FAD/cobalt oxide nanoparticles modified GC electrode showed higher stability for amperometric measurements of nitrite at low concentration range.…”

“…One way of achieving conventional electrodes with electron transfer compounds as mediators. The electrocatalytic reduction of nitrite has been achieved with different inorganic, organic and organometallic compounds such as iron porphyrin and phthalocyanine [25][26][27] cobalt (II) porphyrazine [28] copper complexes [29] cyanoferrate films [30] and polyoxometalates derivatives [22,[31][32][33][34]. Nitrite biosensors have been fabricated with immobilization of cytochrome P450 CYP119 [35] cytochrome c and nitrite reductase [36,37] in film modified electrodes.…”

Investigation of the electrochemical behavior of metallo-tetraazaporphyrin modified silver and pyrolytic graphite electrodes in aqueous nitrite solution

“…Various transition metal complexes whose metal centers are known to bind with nitrogen oxide ligands have been used to derivatize the electrodes. In this respect cyclam complexes [17][18][19][20][21] of nickel(II) and cobalt(II), Fe-Mo-S clusters [22,23], FeCp-arenes [24][25][26][27][28], dendrimers [29], myoglobin [30,31] and copper(II) complexes [32][33][34][35] [40]. The cobalt complex that undergoes OBTTAP centered reduction at an E p,c of À1.10 V vs. Ag|AgCl in DMF, exhibits a new reduction peak at significantly less negative potential at À0.77 V in the presence of nitrite ions.…”

Anodic Stripping Voltammetric Determination of Nitrite Using Carbon Paste Electrode Modified with Chitosan

“…The sensitivity can be further enhanced if the surface of bare electrodes is modified chemically with active thin film offering significant advantageous for design and development of electrochemical sensors. According to the literature survey, all electrodes modified by complexes of iron [15,16], palladium [17], iridium [18], cobalt [19], copper [20], mercury [21], cetyltrimethylammonium bromide [10], phosphomolybdic [22,23] or silicotungestic acids [24,25] have been used successfully for electrochemical oxidation of nitrite. Boron-doped diamond electrode [26] has also been applied for monitoring nitrite, but it needs special instruments not ever available elsewhere.…”