Electrochemistry Application — Conductive Metal-Organic Frameworks for Amperometric Sensing of Paracetamol

5 measurement groups · 15 results

Reported values remain attached to the sample, method, conditions, extraction quality and source location that produced them.

Cyclic voltammetry control test

Voltammetry

Bare GCE control electrode · Electrode

Bare GCE cycled in PBS (pH = 6.5) for comparison with NiCu-CAT/GCE in the paracetamol electrochemical study.

Temperature: 298.15
Geometry: Three-electrode cell; bare GCE working electrode, Pt wire counter electrode, Ag/AgCl reference electrode.
Context: Bare carbon electrode control without conductive MOF coating.
Measurement source: main p.5 · Electrocatalytic Behavior of Paracetamol · Figure 4A

Property	Reported value	Normalised value	Uncertainty	Origin and quality	Source
Bare GCE redox response	No redox peaks observed in the studied potential region	—	—	Text Qualitative	main p.5 · Electrocatalytic Behavior of Paracetamol · Figure 4A

Cyclic voltammetry electrocatalysis test

Voltammetry

NiCu-CAT/GCE sensing electrode · Electrode

40 uM paracetamol in PBS (pH = 6.5), potential window -0.8 to 0.8 V, scan rate 100 mV/s.

Temperature: 298.15
Geometry: Three-electrode cell; NiCu-CAT/GCE working electrode, Pt wire counter electrode, Ag/AgCl reference electrode.
Context: Composite NiCu-CAT/Nafion/GCE sensing electrode.
Measurement source: main p.5 · Electrocatalytic Behavior of Paracetamol · Figure 4A

Property	Reported value	Normalised value	Uncertainty	Origin and quality	Source
Qualitative electrode conductivity improvement	Conductivity of the electrode is improved by NiCu-CAT	—	—	Text Qualitative	main p.5 · Electrocatalytic Behavior of Paracetamol · Figure 4A
NiCu-CAT/GCE anodic redox peak potential	0.53 V	—	—	Text Rounded Reported	main p.5 · Electrocatalytic Behavior of Paracetamol · Figure 4A
NiCu-CAT/GCE cathodic redox peak potential	-0.14 V	—	—	Text Rounded Reported	main p.5 · Electrocatalytic Behavior of Paracetamol · Figure 4A

Cyclic voltammetry pH-dependence test

Voltammetry

NiCu-CAT/GCE sensing electrode · Electrode

50 uM paracetamol at NiCu-CAT/GCE in 0.1 M PBS at pH 5.5, 6.0, 6.5, 7.0 and 8.0.

Temperature: 298.15
Geometry: Three-electrode cell; NiCu-CAT/GCE working electrode, Pt wire counter electrode, Ag/AgCl reference electrode.
Context: Composite NiCu-CAT/Nafion/GCE sensing electrode.
Measurement source: main pp.3-5 · Electrochemical Measurements; Effect of the pH Values · Figure 3

Property	Reported value	Normalised value	Uncertainty	Origin and quality	Source
Optimal pH for paracetamol detectionMarked as a best value within this paper	pH 6.5 chosen for further PA detection	—	—	Text Exact Reported	main p.5 · Effect of the pH Values · Figure 3A
Proton/electron ratio from pH dependence	1:1 ratio of protons to electrons	—	—	Text Qualitative	main p.5 · Effect of the pH Values · Figure 3B
Epa-pH slope	-47.5 mV/pH	—	R = 0.98802	Text Rounded Reported	main p.5 · Effect of the pH Values · Figure 3B

Cyclic voltammetry scan-rate dependence

Voltammetry

NiCu-CAT/GCE sensing electrode · Electrode

40 uM paracetamol on NiCu-CAT/GCE at scan rates of 10, 20, 50, 100, 200 and 300 mV/s.

Temperature: 298.15
Geometry: Three-electrode cell; NiCu-CAT/GCE working electrode, Pt wire counter electrode, Ag/AgCl reference electrode.
Context: Composite NiCu-CAT/Nafion/GCE sensing electrode.
Measurement source: main pp.4-7 · Effect of the Potential Scan Rate · Figure 4B-D

Property	Reported value	Normalised value	Uncertainty	Origin and quality	Source
Charge-transfer coefficient from Laviron analysis	alpha = 0.50	—	—	Text Exact Reported	main p.7 · Effect of the Potential Scan Rate · Figure 4D
Electron-transfer number from Laviron analysis	n = 2	—	—	Text Exact Reported	main p.7 · Effect of the Potential Scan Rate · Figure 4D
Anodic peak potential versus ln(v) slope	Epa (V) = 0.020 ln v + 0.580; R2 = 0.9535	—	R2 = 0.9535	Text Rounded Reported	main p.5 · Effect of the Potential Scan Rate · Figure 4D
Cathodic peak potential versus ln(v) slope	Epc (V) = -0.019 ln v - 0.580; R2 = 0.9859	—	R2 = 0.9859	Text Rounded Reported	main p.5 · Effect of the Potential Scan Rate · Figure 4D
Anodic peak current versus scan-rate slope	Ipa [uA] = 101.88 v [V s^-1] - 0.25; R2 = 0.980	—	R2 = 0.980	Text Rounded Reported	main p.5 · Effect of the Potential Scan Rate · Figure 4C
Cathodic peak current versus scan-rate slope	Ipc [uA] = -45.45 v [V s^-1] - 8.471; R2 = 0.957	—	R2 = 0.957	Text Rounded Reported	main p.5 · Effect of the Potential Scan Rate · Figure 4C
Paracetamol electro-oxidation stoichiometry	Two-proton and two-electron process	—	—	Text Qualitative	main p.7 · Effect of the Potential Scan Rate · Scheme 1
CV scan-rate range	10-300 mV/s	—	range	Caption Range	main p.4 · Figure caption · Figure 4B

Electrochemical impedance spectroscopy (EIS)

Impedance spectroscopy

NiCu-CAT/GCE sensing electrode · Electrode

Reported as carried out using a CHI760E electrochemical workstation in the same three-electrode configuration; no EIS data or fitted values were found in the supplied main text or SI text.

Temperature: 298.15
Geometry: Three-electrode cell; NiCu-CAT/GCE working electrode, Pt wire counter electrode, Ag/AgCl reference electrode.
Context: Composite NiCu-CAT/Nafion/GCE sensing electrode.
Measurement source: main p.3 · Electrochemical Measurements

Property	Reported value	Normalised value	Uncertainty	Origin and quality	Source