Primary studyCore evidenceTransport Physics

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

Wang N., Liang S., Zhang L. et al. · Colloids and Surfaces A: Physicochemical and Engineering Aspects · 2020 · 125199

1materials
2samples
2synthesis routes
12measurements
35results
6claims and caveats

Evidence map

Open a family to keep every result attached to its sample, method and conditions.

Author interpretations and caveats

Paraphrased for this database from the authors’ stated interpretations — never quoted verbatim — and kept separate from reported measurements.

Application RelevanceSupport assessment: High

Ni-MOF/GCE shows anti-interference, chronoamperometric stability, storage retention and reproducibility for H2O2 sensing.

Caveat: Interference response is reported qualitatively; no full selectivity table is supplied.

5 · 3.3. Stability and reproducibility · Figure 5 · Linked to 4 structured results

Application RelevanceSupport assessment: High

Ni-MOF/GCE functions as a non-enzymatic H2O2 sensor with a 0.5-2000 uM linear range and 0.18 uM detection limit.

Caveat: Application result is for a composite electrode containing Nafion and GCE rather than an isolated free-standing MOF device.

3 · 3.2. Electrochemical sensing of H2O2 · Figure 4; Table 1 · Linked to 4 structured results

Application RelevanceSupport assessment: Medium

Ni-MOF/GCE acts as an electrocatalyst for methanol oxidation in alkaline electrolyte, giving about 18 mA cm^-2 M^-1 current density response.

Caveat: Current-density stability in Figure 7 is mostly qualitative; the stable value was visually estimated from the plot.

6 · 4. Conclusion · Figures 6-7 · Linked to 3 structured results

CaveatSupport assessment: High

Although the introduction motivates MOFs with good electrical conductivity, this paper reports electrochemical application data rather than direct solid-state electrical-transport or thermoelectric measurements.

Caveat: No conductivity value, mobility, Seebeck coefficient or device transport geometry was found in the main text or figures.

2 · Introduction

Phase AssignmentSupport assessment: High

SEM, XRD, ATR-FTIR and TGA support successful preparation of the IL-supported Ni-MOF crystals.

Caveat: Exact formula and crystallographic details are not reported in this paper; XRD is compared to prior simulated single-crystal data.

5 · 4. Conclusion · Linked to 4 structured results

Transport MechanismSupport assessment: Medium

Linear scan-rate dependence of the Ni2+/Ni3+ redox peak currents indicates a surface-controlled electrochemical process on Ni-MOF/GCE.

Caveat: The paper does not provide raw peak-current tables; figure equations were not used because the annotation was visually small.

3 · 3.1. Characterization of the Ni-MOF · Figure 2 · Linked to 1 structured result

Material identities

Names and aliases are kept exactly within the paper’s own identity model.

MaterialCompositionStructure contextSource
ionic liquid supported nickel-based metal-organic framework (Ni-MOF/IL)Ni-BTC/OAc/[EMI] framework; exact empirical formula not reportedNi centres from Ni(OAc)2.4H2O · 1,3,5-benzenetricarboxylate (BTC), acetate (OAc) and 1-ethyl-3-methylimidazolium ([EMI]) ligand from [EMI]Brunknown · PristineCrystalline Ni-MOF assigned by powder XRD matching simulated single-crystal data from prior Ni-(H)BTC work; FTIR indicates coordinated BTC, OAc and [EMI]-containing structure.2 · 2.3. Synthesis of the Ni-MOF

Sample register

Sample form, processing state and composition status define the context for measurements.

Show 2 sample records
SampleForm and roleProcessing and geometrySource
as-synthesised Ni-MOF crystalsresearch_0392__mat__ni_mof_ilPowder · Target Sample · Pristine FrameworkCrystals obtained after ionothermal synthesis, washed with DMF and ethanol, and vacuum dried at 60 C overnight.2 · 2.3. Synthesis of the Ni-MOF
Ni-MOF modified glassy carbon electrode (Ni-MOF/GCE)research_0392__mat__ni_mof_ilElectrode · Composite Sample · CompositeNi-MOF ethanol suspension and Nafion were dripped onto polished/cleaned GCE and dried under an infrared lamp.glassy carbon electrode, diameter 5 mm2 · 2.4. Fabrication of the Ni-MOF modified electrode