Sensing Application — Ionic liquid supported nickel-based metal-organic framework for electrochemical sensing of hydrogen peroxide and electrocatalytic oxidation of methanol

5 measurement groups · 20 results

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

Chronoamperometry calibration for H2O2 sensing

Chronoamperometry

Ni-MOF modified glassy carbon electrode (Ni-MOF/GCE) · Electrode

Continuous additions of H2O2 into stirred 0.5 M NaOH at 0.5 V applied potential; current response recorded by chronoamperometry.

Geometry: Ni-MOF modified 5 mm GCE in three-electrode cell
Context: Ni-MOF/Nafion/GCE composite electrode
Measurement source: 2 · 2.5. Electrochemical responses toward H2O2 and methanol · Figure 4

Property	Reported value	Normalised value	Uncertainty	Origin and quality	Source
H2O2 calibration correlation coefficient	R = 0.9961	—	—	Figure Axis Approximate	4 · 3.2. Electrochemical sensing of H2O2 · Figure 4b
H2O2 detection limitMarked as a best value within this paper	0.18 uM (S/N = 3)	—	—	Table Exact Reported	5 · 3.2. Electrochemical sensing of H2O2 · Table 1
H2O2 linear detection range lower boundMarked as a best value within this paper	0.5 uM	—	—	Table Exact Reported	5 · 3.2. Electrochemical sensing of H2O2 · Table 1
H2O2 linear detection range upper boundMarked as a best value within this paper	2000 uM (2.0 mM)	—	—	Table Exact Reported	5 · 3.2. Electrochemical sensing of H2O2 · Table 1
Selected applied potential for H2O2 detection	0.5 V	—	—	Text Exact Reported	3 · 3.2. Electrochemical sensing of H2O2 · Figure 3b

Cyclic voltammetry for H2O2 oxidation response

Voltammetry

Ni-MOF modified glassy carbon electrode (Ni-MOF/GCE) · Electrode

0.5 M NaOH; 50 mV s^-1; Ni-MOF/GCE with and without H2O2.

Geometry: Ni-MOF modified 5 mm GCE in three-electrode cell
Context: Ni-MOF/Nafion/GCE composite electrode
Measurement source: 3 · 3.2. Electrochemical sensing of H2O2 · Figure 3a

Property	Reported value	Normalised value	Uncertainty	Origin and quality	Source
H2O2 CV oxidation response	oxidation current increased significantly with H2O2 addition	—	—	Text Qualitative	3 · 3.2. Electrochemical sensing of H2O2 · Figure 3a

Amperometric anti-interference test

Chronoamperometry

Ni-MOF modified glassy carbon electrode (Ni-MOF/GCE) · Electrode

0.5 M NaOH; additions of 1 mM H2O2, dopamine, ascorbic acid, glucose, uric acid, adenine and D-fructose.

Geometry: Ni-MOF modified 5 mm GCE
Context: Ni-MOF/Nafion/GCE composite electrode
Measurement source: 5 · 3.2. Electrochemical sensing of H2O2 · Figure 5a

Property	Reported value	Normalised value	Uncertainty	Origin and quality	Source
Anti-interference behaviour	remarkable H2O2 response; interfering substances gave indistinguishable signal	—	—	Text Qualitative	4 · 3.2. Electrochemical sensing of H2O2 · Figure 5a

Standard-addition recovery of H2O2 in diluted pure milk

Ni-MOF modified glassy carbon electrode (Ni-MOF/GCE) · Electrode

Three H2O2 spike levels added to diluted milk samples; concentrations calculated from current signals using the Fig. 4b calibration relationship.

Geometry: Ni-MOF modified 5 mm GCE
Context: Ni-MOF/Nafion/GCE composite electrode in real-sample sensing
Measurement source: 5 · 3.4. Detection of H2O2 in real sample · Table 2

Property	Reported value	Normalised value	Uncertainty	Origin and quality	Source
Milk H2O2 spike 1 found concentration	spiked 0.1 mM; found 0.098 mM	—	—	Table Exact Reported	5 · 3.4. Detection of H2O2 in real sample · Table 2
Milk H2O2 spike 1 recovery	98%	—	—	Table Exact Reported	5 · 3.4. Detection of H2O2 in real sample · Table 2
Milk H2O2 spike 2 found concentration	spiked 0.5 mM; found 0.487 mM	—	—	Table Exact Reported	5 · 3.4. Detection of H2O2 in real sample · Table 2
Milk H2O2 spike 2 recovery	97.4%	—	—	Table Exact Reported	5 · 3.4. Detection of H2O2 in real sample · Table 2
Milk H2O2 spike 3 found concentration	spiked 1.0 mM; found 1.021 mM	—	—	Table Exact Reported	5 · 3.4. Detection of H2O2 in real sample · Table 2
Milk H2O2 spike 3 recovery	102.1%	—	—	Table Exact Reported	5 · 3.4. Detection of H2O2 in real sample · Table 2

Chronoamperometric stability, storage stability, regeneration and reproducibility tests

Chronoamperometry

Ni-MOF modified glassy carbon electrode (Ni-MOF/GCE) · Electrode

Stability in 0.5 M NaOH containing 1.0 mM H2O2 at 0.5 V; storage at 4 C for 1, 3, 5 and 7 days; reproducibility with five modified electrodes in 0.1 mol L^-1 H2O2.

Geometry: Ni-MOF modified 5 mm GCE
Context: Ni-MOF/Nafion/GCE composite electrode
Measurement source: 4 · 3.3. Stability and reproducibility · Figure 5b

Property	Reported value	Normalised value	Uncertainty	Origin and quality	Source
Current retained after 1000 s H2O2 chronoamperometry	89% of initial current response after 1000 s	—	—	Text Exact Reported	4 · 3.2. Electrochemical sensing of H2O2 · Figure 5b
Regeneration cycles retaining high activity	high activity after 5 regeneration cycles	—	—	Text Qualitative	4 · 3.3. Stability and reproducibility
Current response RSD across five electrodes	about 5.4%	—	—	Text Approximate	5 · 3.3. Stability and reproducibility
Stored-electrode peak-current retention after 1 day	99.67%	—	—	Text Exact Reported	4 · 3.3. Stability and reproducibility
Stored-electrode peak-current retention after 3 days	96.55%	—	—	Text Exact Reported	4 · 3.3. Stability and reproducibility
Stored-electrode peak-current retention after 5 days	93.92%	—	—	Text Exact Reported	4 · 3.3. Stability and reproducibility
Stored-electrode peak-current retention after 7 days	91.53%	—	—	Text Exact Reported	4 · 3.3. Stability and reproducibility