Electrochemistry Application — Two-dimensional conductive metal-organic frameworks with dual metal sites toward the electrochemical oxygen evolution reaction

8 measurement groups · 23 results

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

Cyclic voltammetry-derived double-layer capacitance

Voltammetry

NiPc-Ni catalyst ink on glassy carbon · Electrode

CV in non-faradaic 0.87-0.97 V vs RHE window at 20-200 mV s^-1; Cdl from current-density change versus scan rate.

Temperature: 298
Atmosphere: O2-saturated electrolyte
Geometry: glassy carbon working electrode
Context: composite catalyst inks on GC
Measurement source: 1626-1628 · OER performance; Electrochemical measurements · Fig. 4c; Fig. S12

Property	Reported value	Normalised value	Uncertainty	Origin and quality	Source
double-layer capacitance Cdl	1.96 mF cm^-2	0.00196 F cm^-2	—	Text Exact Reported	1626 · OER performance · Fig. 4c; Fig. S12
double-layer capacitance Cdl	1.93 mF cm^-2	0.00193 F cm^-2	—	Text Exact Reported	1626 · OER performance · Fig. 4c; Fig. S12
double-layer capacitance Cdl	1.86 mF cm^-2	0.00186 F cm^-2	—	Text Exact Reported	1626 · OER performance · Fig. 4c; Fig. S12
double-layer capacitance CdlMarked as a best value within this paper	2.15 mF cm^-2	0.00215 F cm^-2	—	Text Exact Reported	1626 · OER performance · Fig. 4c; Fig. S12

Electrochemical impedance spectroscopy

Impedance spectroscopy

NiPc-Ni catalyst ink on glassy carbon · Electrode

EIS at 1.67 V vs RHE, 0.05 Hz to 100 kHz in 1 M KOH; results include all four catalyst ink electrodes.

Temperature: 298
Atmosphere: O2-saturated electrolyte
Geometry: glassy carbon working electrode
Context: composite catalyst inks on GC
Measurement source: 1626-1628 · OER performance; Electrochemical measurements · Fig. 4d

Property	Reported value	Normalised value	Uncertainty	Origin and quality	Source
charge-transfer resistance RctMarked as a best value within this paper	10.16 ohm cm^2	—	—	Text Exact Reported	1626 · OER performance · Fig. 4d
charge-transfer resistance Rct	20.42 ohm cm^2	—	—	Text Exact Reported	1626 · OER performance · Fig. 4d
charge-transfer resistance Rct	13.38 ohm cm^2	—	—	Text Exact Reported	1626 · OER performance · Fig. 4d
charge-transfer resistance Rct	78.53 ohm cm^2	—	—	Text Exact Reported	1626 · OER performance · Fig. 4d

Linear sweep voltammetry for OER

Voltammetry

NiPc-Ni catalyst ink on glassy carbon · Electrode

Three-electrode cell, 1 M O2-saturated KOH, 298 K, SCE reference, graphite rod counter, GC working electrode; 0.01 V s^-1 scan rate, 95% iR correction.

Temperature: 298
Atmosphere: O2-saturated electrolyte
Geometry: 3 mm glassy carbon working electrode
Context: composite catalyst ink on GC
Measurement source: 1625-1628 · OER performance; Electrochemical measurements · Fig. 4a

Property	Reported value	Normalised value	Uncertainty	Origin and quality	Source
overpotential at 10 mA cm^-2Marked as a best value within this paper	427 mV at 10 mA cm^-2	0.427 V	—	Text Exact Reported	1626 · OER performance · Table S2
OER onset overpotentialMarked as a best value within this paper	319 mV	0.319 V	—	Text Exact Reported	1626 · OER performance · Fig. 4a; Table S2
Tafel slopeMarked as a best value within this paper	83 mV dec^-1	—	—	Text Exact Reported	1626 · OER performance · Fig. 4b; Table S2

Linear sweep voltammetry for OER

Voltammetry

NiPc-Zn catalyst ink on glassy carbon · Electrode

Three-electrode cell, 1 M O2-saturated KOH, 298 K; 0.01 V s^-1 scan rate, 95% iR correction.

Temperature: 298
Atmosphere: O2-saturated electrolyte
Geometry: 3 mm glassy carbon working electrode
Context: composite catalyst ink on GC
Measurement source: 1625-1628 · OER performance; Electrochemical measurements · Fig. 4a

Property	Reported value	Normalised value	Uncertainty	Origin and quality	Source
overpotential at 10 mA cm^-2	573 mV at 10 mA cm^-2	0.573 V	—	Text Exact Reported	1626 · OER performance · Fig. 4a
OER onset overpotential	391 mV	0.391 V	—	Text Exact Reported	1626 · OER performance · Fig. 4a
Tafel slope	123 mV dec^-1	—	—	Text Exact Reported	1626 · OER performance · Fig. 4b

Linear sweep voltammetry for OER

Voltammetry

ZnPc-Ni catalyst ink on glassy carbon · Electrode

Three-electrode cell, 1 M O2-saturated KOH, 298 K; 0.01 V s^-1 scan rate, 95% iR correction.

Temperature: 298
Atmosphere: O2-saturated electrolyte
Geometry: 3 mm glassy carbon working electrode
Context: composite catalyst ink on GC
Measurement source: 1625-1628 · OER performance; Electrochemical measurements · Fig. 4a

Property	Reported value	Normalised value	Uncertainty	Origin and quality	Source
overpotential at 10 mA cm^-2	516 mV at 10 mA cm^-2	0.516 V	—	Text Exact Reported	1626 · OER performance · Fig. 4a
OER onset overpotential	363 mV	0.363 V	—	Text Exact Reported	1626 · OER performance · Fig. 4a
Tafel slope	134 mV dec^-1	—	—	Text Exact Reported	1626 · OER performance · Fig. 4b

Linear sweep voltammetry for OER

Voltammetry

ZnPc-Zn catalyst ink on glassy carbon · Electrode

Three-electrode cell, 1 M O2-saturated KOH, 298 K; 0.01 V s^-1 scan rate, 95% iR correction.

Temperature: 298
Atmosphere: O2-saturated electrolyte
Geometry: 3 mm glassy carbon working electrode
Context: composite catalyst ink on GC
Measurement source: 1625-1628 · OER performance; Electrochemical measurements · Fig. 4a

Property	Reported value	Normalised value	Uncertainty	Origin and quality	Source
OER onset overpotential	464 mV	0.464 V	—	Text Exact Reported	1626 · OER performance · Fig. 4a
Tafel slope	242 mV dec^-1	—	—	Text Exact Reported	1626 · OER performance · Fig. 4b

Chronoamperometry stability test and post-test Ni 2p XPS

X-ray photoelectron spectroscopy Chronoamperometry

NiPc-Ni@carbon cloth stability electrode · Electrode

NiPc-Ni@carbon cloth chronoamperometry for about 12 h; before/after XPS shown.

Geometry: carbon cloth electrode
Context: composite MOF on carbon cloth
Measurement source: 14 · Stability Test · Fig. S15

Property	Reported value	Normalised value	Uncertainty	Origin and quality	Source
chronoamperometry current after about 12 h	approximately 0.014 A at 12 h	—	—	Visual Estimate Approximate	14 · Stability Test · Fig. S15a

Turnover frequency calculated from LSV curves

Voltammetry

NiPc-Ni catalyst ink on glassy carbon · Electrode

TOF at applied potential 1.8 V; active sites treated as surface Ni atoms and AECSA derived from Cdl using 40 uF cm^-2 per cm_ECSA^2.

Temperature: 298
Atmosphere: O2-saturated electrolyte
Geometry: glassy carbon working electrode
Context: composite catalyst inks on GC
Measurement source: 2; 12 · TOF calculation · Fig. S13

Property	Reported value	Normalised value	Uncertainty	Origin and quality	Source
TOF at 1.8 VMarked as a best value within this paper	11.32 O2 s^-1 per Ni site	—	—	Text Exact Reported	1626 · OER performance · Fig. S13
TOF at 1.8 V	3.30 O2 s^-1 per Ni site	—	—	Text Exact Reported	1626 · OER performance · Fig. S13
TOF at 1.8 V	4.19 O2 s^-1 per Ni site	—	—	Text Exact Reported	1626 · OER performance · Fig. S13