Synergistic electrocatalytic effect of graphene/nickel hydroxide composite for the simultaneous electrochemical determination of ascorbic acid, dopamine and uric acid
“…This important neurotransmitter plays an important role in the central nervous, hormonal, renal, and cardiovascular systems. Surprisingly, a simple screen printed electrode using graphene ink exhibits excellent LOD (0.12 lM) and linearity (0.5-2000 lM) [257] compared to those of the Ni/solar graphene/GCE (0.12 lM and 0.44-3.3 lM) [261]. A noticeably lower LOD (0.03 lM) is obtained by the graphene-Pt/GCE but linearity only ranges from 0.03 to 8.13 lM [264], comparable to that of the cobalt tetraphenylporphyrin-chemically reduced graphene/GCE (0.03 lM, 0.1-12 lM) [265].…”
Section: Other Small Electroactive Analytesmentioning
“…This important neurotransmitter plays an important role in the central nervous, hormonal, renal, and cardiovascular systems. Surprisingly, a simple screen printed electrode using graphene ink exhibits excellent LOD (0.12 lM) and linearity (0.5-2000 lM) [257] compared to those of the Ni/solar graphene/GCE (0.12 lM and 0.44-3.3 lM) [261]. A noticeably lower LOD (0.03 lM) is obtained by the graphene-Pt/GCE but linearity only ranges from 0.03 to 8.13 lM [264], comparable to that of the cobalt tetraphenylporphyrin-chemically reduced graphene/GCE (0.03 lM, 0.1-12 lM) [265].…”
Section: Other Small Electroactive Analytesmentioning
“…Both the CV and DPV experiments confirmed that GF/ NiCo 2 O 4 possessed good electrocatalytic activity towards the oxidation of these molecules. The highly electrocatalytic activity of GF/ NiCo 2 O 4 could be probably due to the synergistic effect between the high conductivity of GF and the catalytic activity of NiCo 2 O 4 nanowires [29]. In order to better understand the catalytic activity of NiCo 2 O 4 nanowires, Scheme 2 displayed the mechanism of the reactions between AA, DA, UA and NiCo 2 O 4 .…”
“…dopamine (DA), uric acid (UA) and ascorbic acid (AA) [16][17][18]. DA and AA are compounds of great biomedical interest, playing significant roles in the functioning of the human metabolism, central nervous and renal systems [19]. DA is an important monoamine neurotransmitter in central nervous system of mammalians [20].…”
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