Engineering of a self-supported carbon electrode with 2D ultrathin heterostructures of NiCo LDH/NiCoS via a MOF-template for sensitive detection of glucose and H₂O₂

Abstract

Reasonable design and development of bifunctional electrodes for glucose and hydrogen peroxide (H2O2) detecting are of great significance since the glucose and H2O2 levels are important indicators for evaluating environmental...

Recent advances in layered double hydroxides‐based electrochemical sensors: Insight in transition metal contribution

“…4) [39] . NiCo CC E app = 0.50 V/SCE 0.1 M KOH 5.0 0.12 [41] CoCuCH/CuF E app = 0.55 V/Ag-AgCl 0.2 M NaOH 10.8 0.68 [42] AuNPS/CuF E app = 0.50 V/Ag-AgCl 0.1 M NaOH 23.1 0.17 [43] CoxP/NiF E app = 0.64 V/Hg-HgO 0.1 M NaOH 5.7 0.6 [44] MOF-74(NiO)/CC E app = 0.55 V/Hg-HgO 1 M KOH 1.69 0.28 [45] MOF-NiCoS/CC E app = 0.50 V/Hg-HgO 0.5 M NaOH 2.16 0.21 [46] MOF-NiFe2O4/RGO/GCE E app = 0.50 V/SCE 0.1 M NaOH 0.11 13 [47] Fig. 4.…”

“…Metal organic frameworks (MOFs) can be used as a template to synthesize NiCo-LDH with novel hierarchical and submicroscopic structures leading to superior pseudocapacitance properties [48] . Wang et al have adopted the same strategy for glucose sensing, via MOFtemplate methods to design 2D heterostructures of NiCo-LDH/NiO [45] or NiCo-LDH/NiCoS [46] grown on CC. Figure 6 shows the different steps for the preparation of the NiCo-LDH/NiO/CC electrode.…”

Self-Supported Carbon Electrodes with a Carbon Membrane and Co3O4 Nanosheets for High-Performance Enzymeless Glucose Detection and Supercapacitors

“…Based on electrochemical process theory, when the adsorption or diffusion process is involved, a slope of 1.0 or 0.5 is expected according to the plot of log J pa versus log v. 43 The slope (0.78) is much higher than the theoretically expected value of 0.5, suggesting a dominant diffusion process mixed with an adsorption process over the Co 3 O 4 NSs/CM electrode. 43,44 Figure 4d shows CV curves of the Co 3 O 4 NSs/CM electrode in a NaOH solution with glucose concentrations varying from 0 to 2.0 mM. Clearly, there is no glucose oxidation peak in the absence of glucose.…”

Recent Progress in MOF-Based Electrochemical Sensors for Non-Enzymatic Glucose Detection

“…Ultrathin, NiCo-layered double hydroxide (LDH)/NiCoS array nanostructures were found for Co-MOF using the glucose sensor [ 69 ]. This result shows that the 2D hybrid NiCo LDH/NiCoS array nanostructure sensor exhibited excellent electrocatalytic activity towards glucose in a range of 0.001 μM, with a sensitivity of 2167 μA mM −1 cm −2 .…”