Electrochemistry Application — Highly Dispersed MoO2Nanoparticles Confined in N-Doped Porous Carbon Nanosheets for Efficient Hydrogen Evolution in Alkaline Media

Measurement evidence

Electrochemistry Application

Highly Dispersed MoO2Nanoparticles Confined in N-Doped Porous Carbon Nanosheets for Efficient Hydrogen Evolution in Alkaline Media · Wu J.-Q., Zhao J.-W., Li G.-R. · Energy and Fuels · 2020 · 9050-9057

4 measurement groups · 9 results

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

cyclic voltammetry double-layer capacitance

MoO2 NPs@N-C NSs/NF · Electrode

CVs in nonfaradaic region 0.05-0.55 V vs RHE at 10, 30, 40, 50, 60, and 80 mV s-1 in 1.0 M KOH; charging current at 0.3 V.

Geometry
working electrode on nickel foam
Context
Target sample ECSA proxy.
Measurement source
2 and 5 · Electrochemical Characterizations; Results and Discussion · Figure 3f; Figure S7
PropertyReported valueNormalised valueUncertaintyOrigin and qualitySource
double-layer capacitance Cdlabout 46.67 mF cm-2Text
Approximate
5 · Results and Discussion · Figure 3f; Figure S7

chronopotentiometry and cycling stability

MoO2 NPs@N-C NSs/NF · Electrode

Long-term durability at 10 mA cm-2 for 24 h at room temperature; LSV before and after 1000 cycles.

Geometry
working electrode on nickel foam
Context
Target HER electrode stability.
Measurement source
5 · Results and Discussion · Figure 3d-e
PropertyReported valueNormalised valueUncertaintyOrigin and qualitySource
potential change after 1000 cyclesMarked as a best value within this paperabout 11.4 mVText
Approximate
5 · Results and Discussion · Figure 3e
overpotential attenuation at 10 mA cm-2 for 24 hMarked as a best value within this paperabout 2%Text
Approximate
5 · Results and Discussion · Figure 3d

linear sweep voltammetry (LSV)

MoO2 NPs@N-C NSs/NF · Electrode

Three-electrode cell in 1.0 M KOH; SCE reference, carbon rod counter, catalyst loading 0.06 mg cm-2; iR-corrected; 5 mV s-1.

Geometry
working electrode on nickel foam
Context
Compared with NF and MoO2/NF controls.
Measurement source
2-4 · Electrochemical Characterizations; Results and Discussion · Figure 3a; Figure S6
PropertyReported valueNormalised valueUncertaintyOrigin and qualitySource
MoO2/NF HER overpotential at 10 mA cm-2210 mVText
Rounded Reported
4 · Results and Discussion · Figure 3a
NF HER overpotential at 10 mA cm-2250 mVText
Rounded Reported
4 · Results and Discussion · Figure 3a
HER overpotential at 10 mA cm-2Marked as a best value within this paper160 mV at 10 mA cm-2Text
Rounded Reported
4 · Results and Discussion · Figure 3a

Tafel analysis

MoO2 NPs@N-C NSs/NF · Electrode

Tafel slopes derived from HER polarisation data in 1.0 M KOH.

Geometry
working electrode on nickel foam
Context
Compared with NF and MoO2/NF controls.
Measurement source
4 · Results and Discussion · Figure 3b
PropertyReported valueNormalised valueUncertaintyOrigin and qualitySource
MoO2/NF Tafel slope154.6 mV dec-1Text
Rounded Reported
4 · Results and Discussion · Figure 3b
NF Tafel slope167.9 mV dec-1Text
Rounded Reported
4 · Results and Discussion · Figure 3b
Tafel slopeMarked as a best value within this paper92.9 mV dec-1Text
Rounded Reported
4 · Results and Discussion · Figure 3b