Electrochemistry Application — Structural and electronic modulation of conductive MOFs for efficient oxygen evolution reaction electrocatalysis

19 measurement groups · 64 results

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

Cyclic voltammetry for ECSA/Cdl

Voltammetry

NiPc-NiFex powder series · Powder

CV tests in non-faradaic region at scan rates from 20 to 200 mV s-1; Cdl from scan-rate-dependent current density at 0.92 V vs RHE.

Measurement source: 5 · Electrochemical measurements · Fig. S11, Fig. S12

Property	Reported value	Normalised value	Uncertainty	Origin and quality	Source
NiPc-NiFe0.05 CV-derived Cdl	0.77 mF cm-2	—	—	Figure Axis Rounded Reported	9 · ECSA Measurements · Figure S11
NiPc-NiFe0.09 CV-derived CdlMarked as a best value within this paper	1.6 mF cm-2	—	—	Figure Axis Rounded Reported	9 · ECSA Measurements · Figure S11
NiPc-NiFe0.20 CV-derived Cdl	0.62 mF cm-2	—	—	Figure Axis Rounded Reported	9 · ECSA Measurements · Figure S11
NiPc-Fe CV-derived Cdl	0.92 mF cm-2	—	—	Figure Axis Rounded Reported	9 · ECSA Measurements · Figure S11

Electrochemical impedance spectroscopy (EIS)

Impedance spectroscopy

NiPc-NiFe0.05/acetylene black/Nafion on glassy carbon electrode · Electrode

1.57 V, 100 kHz to 0.5 Hz in 1 M KOH; fitted with equivalent circuit parameters.

Geometry: glassy carbon electrode
Context: catalyst ink composite electrode
Measurement source: 3 · OER performance · Fig. 4c; Table S2

Property	Reported value	Normalised value	Uncertainty	Origin and quality	Source
nife005 Equivalent-circuit Cdl	26.62	—	—	SI Table Exact Reported	15 · Equivalent Circuit Parameters for EIS Analysis · Table S2
nife005 CPE	1.726	—	—	SI Table Exact Reported	15 · Equivalent Circuit Parameters for EIS Analysis · Table S2
nife005 Rct	1.557	—	—	SI Table Exact Reported	15 · Equivalent Circuit Parameters for EIS Analysis · Table S2
nife005 Rp	0.139	—	—	SI Table Exact Reported	15 · Equivalent Circuit Parameters for EIS Analysis · Table S2
nife005 Rs	0.7179	—	—	SI Table Exact Reported	15 · Equivalent Circuit Parameters for EIS Analysis · Table S2
nife005 Zo	0.1055	—	—	SI Table Exact Reported	15 · Equivalent Circuit Parameters for EIS Analysis · Table S2

Electrochemical impedance spectroscopy (EIS)

Impedance spectroscopy

NiPc-NiFe0.09/acetylene black/Nafion on glassy carbon electrode · Electrode

1.57 V, 100 kHz to 0.5 Hz in 1 M KOH; fitted with equivalent circuit parameters.

Geometry: glassy carbon electrode
Context: catalyst ink composite electrode
Measurement source: 3 · OER performance · Fig. 4c; Table S2

Property	Reported value	Normalised value	Uncertainty	Origin and quality	Source
nife009 Equivalent-circuit CdlMarked as a best value within this paper	86.92	—	—	SI Table Exact Reported	15 · Equivalent Circuit Parameters for EIS Analysis · Table S2
nife009 CPE	0.3521	—	—	SI Table Exact Reported	15 · Equivalent Circuit Parameters for EIS Analysis · Table S2
nife009 RctMarked as a best value within this paper	0.3315	—	—	SI Table Exact Reported	15 · Equivalent Circuit Parameters for EIS Analysis · Table S2
nife009 RpMarked as a best value within this paper	0.05715	—	—	SI Table Exact Reported	15 · Equivalent Circuit Parameters for EIS Analysis · Table S2
nife009 Rs	0.8756	—	—	SI Table Exact Reported	15 · Equivalent Circuit Parameters for EIS Analysis · Table S2
nife009 Zo	0.1189	—	—	SI Table Exact Reported	15 · Equivalent Circuit Parameters for EIS Analysis · Table S2

Electrochemical impedance spectroscopy (EIS)

Impedance spectroscopy

NiPc-NiFe0.20/acetylene black/Nafion on glassy carbon electrode · Electrode

1.57 V, 100 kHz to 0.5 Hz in 1 M KOH; fitted with equivalent circuit parameters.

Geometry: glassy carbon electrode
Context: catalyst ink composite electrode
Measurement source: 3 · OER performance · Fig. 4c; Table S2

Property	Reported value	Normalised value	Uncertainty	Origin and quality	Source
nife020 Equivalent-circuit Cdl	1.594	—	—	SI Table Exact Reported	15 · Equivalent Circuit Parameters for EIS Analysis · Table S2
nife020 CPE	0.1827	—	—	SI Table Exact Reported	15 · Equivalent Circuit Parameters for EIS Analysis · Table S2
nife020 Rct	2.319	—	—	SI Table Exact Reported	15 · Equivalent Circuit Parameters for EIS Analysis · Table S2
nife020 Rp	0.1603	—	—	SI Table Exact Reported	15 · Equivalent Circuit Parameters for EIS Analysis · Table S2
nife020 Rs	0.949	—	—	SI Table Exact Reported	15 · Equivalent Circuit Parameters for EIS Analysis · Table S2
nife020 Zo	0.02773	—	—	SI Table Exact Reported	15 · Equivalent Circuit Parameters for EIS Analysis · Table S2

Electrochemical impedance spectroscopy (EIS)

Impedance spectroscopy

NiPc-Fe/acetylene black/Nafion on glassy carbon electrode · Electrode

1.57 V, 100 kHz to 0.5 Hz in 1 M KOH; fitted with equivalent circuit parameters.

Geometry: glassy carbon electrode
Context: catalyst ink composite electrode
Measurement source: 3 · OER performance · Fig. 4c; Table S2

Property	Reported value	Normalised value	Uncertainty	Origin and quality	Source
nipc_fe Equivalent-circuit Cdl	1.078	—	—	SI Table Exact Reported	15 · Equivalent Circuit Parameters for EIS Analysis · Table S2
nipc_fe CPE	1.225	—	—	SI Table Exact Reported	15 · Equivalent Circuit Parameters for EIS Analysis · Table S2
nipc_fe Rct	12.26	—	—	SI Table Exact Reported	15 · Equivalent Circuit Parameters for EIS Analysis · Table S2
nipc_fe Rp	3.953	—	—	SI Table Exact Reported	15 · Equivalent Circuit Parameters for EIS Analysis · Table S2
nipc_fe Rs	0.7634	—	—	SI Table Exact Reported	15 · Equivalent Circuit Parameters for EIS Analysis · Table S2
nipc_fe Zo	0.1232	—	—	SI Table Exact Reported	15 · Equivalent Circuit Parameters for EIS Analysis · Table S2

Electrochemical impedance spectroscopy (EIS)

Impedance spectroscopy

NiPc-Ni/acetylene black/Nafion on glassy carbon electrode · Electrode

1.57 V, 100 kHz to 0.5 Hz in 1 M KOH; fitted with equivalent circuit parameters.

Geometry: glassy carbon electrode
Context: catalyst ink composite electrode
Measurement source: 3 · OER performance · Fig. 4c; Table S2

Property	Reported value	Normalised value	Uncertainty	Origin and quality	Source
nipc_ni Equivalent-circuit Cdl	40.17	—	—	SI Table Exact Reported	15 · Equivalent Circuit Parameters for EIS Analysis · Table S2
nipc_ni CPE	427.2	—	—	SI Table Exact Reported	15 · Equivalent Circuit Parameters for EIS Analysis · Table S2
nipc_ni Rct	19.25	—	—	SI Table Exact Reported	15 · Equivalent Circuit Parameters for EIS Analysis · Table S2
nipc_ni Rp	0.3281	—	—	SI Table Exact Reported	15 · Equivalent Circuit Parameters for EIS Analysis · Table S2
nipc_ni Rs	0.7638	—	—	SI Table Exact Reported	15 · Equivalent Circuit Parameters for EIS Analysis · Table S2
nipc_ni Zo	0.3553	—	—	SI Table Exact Reported	15 · Equivalent Circuit Parameters for EIS Analysis · Table S2

Linear sweep voltammetry (LSV) for OER

Voltammetry

NiPc-NiFe0.05/acetylene black/Nafion on glassy carbon electrode · Electrode

Oxygen-saturated 1.0 M KOH, three-electrode system, 298 K, 95% iR correction, 10 mV s-1, 1.07-1.87 V.

Temperature: 298
Atmosphere: oxygen-saturated
Geometry: glassy carbon disk working electrode, diameter 3 mm
Context: catalyst ink composite electrode
Measurement source: 3 · OER performance · Fig. 4a

Property	Reported value	Normalised value	Uncertainty	Origin and quality	Source
NiPc-NiFe0.05 OER overpotential at 100 mA cm-2	410 mV at 100 mA cm-2	—	—	Text Exact Reported	3 · OER performance · Fig. 4a
NiPc-NiFe0.05 OER overpotential at 10 mA cm-2	333 mV at 10 mA cm-2	—	—	Text Exact Reported	3 · OER performance · Fig. 4a
NiPc-NiFe0.05 Ni2+/Ni3+ oxidation peak potential	1.491 V	—	—	Text Exact Reported	3 · OER performance · Fig. S10
NiPc-NiFe0.05 TOF at eta = 300 mV	1.181 s-1 at eta = 300 mV	—	—	Text Exact Reported	4 · OER performance · Table S1

Linear sweep voltammetry (LSV) for OER

Voltammetry

NiPc-NiFe0.09/acetylene black/Nafion on glassy carbon electrode · Electrode

Oxygen-saturated 1.0 M KOH, three-electrode system, 298 K, 95% iR correction, 10 mV s-1, 1.07-1.87 V.

Temperature: 298
Atmosphere: oxygen-saturated
Geometry: glassy carbon disk working electrode, diameter 3 mm
Context: catalyst ink composite electrode
Measurement source: 3 · OER performance · Fig. 4a

Property	Reported value	Normalised value	Uncertainty	Origin and quality	Source
NiPc-NiFe0.09 OER overpotential at 100 mA cm-2Marked as a best value within this paper	384 mV at 100 mA cm-2	—	—	Text Exact Reported	3 · OER performance · Fig. 4a
NiPc-NiFe0.09 OER overpotential at 10 mA cm-2Marked as a best value within this paper	300 mV at 10 mA cm-2	—	—	Text Exact Reported	3 · OER performance · Fig. 4a
NiPc-NiFe0.09 Ni2+/Ni3+ oxidation peak potential	1.521 V	—	—	Text Approximate	3 · OER performance · Fig. S10
NiPc-NiFe0.09 TOF at eta = 300 mVMarked as a best value within this paper	1.943 s-1 at eta = 300 mV	—	—	Text Exact Reported	4 · OER performance · Table S1
NiPc-NiFe0.09 TOF at eta = 350 mVMarked as a best value within this paper	11.943 s-1 at eta = 350 mV	—	—	Text Exact Reported	4 · OER performance · Table S1

Linear sweep voltammetry (LSV) for OER

Voltammetry

NiPc-NiFe0.20/acetylene black/Nafion on glassy carbon electrode · Electrode

Oxygen-saturated 1.0 M KOH, three-electrode system, 298 K, 95% iR correction, 10 mV s-1, 1.07-1.87 V.

Temperature: 298
Atmosphere: oxygen-saturated
Geometry: glassy carbon disk working electrode, diameter 3 mm
Context: catalyst ink composite electrode
Measurement source: 3 · OER performance · Fig. 4a

Property	Reported value	Normalised value	Uncertainty	Origin and quality	Source
NiPc-NiFe0.20 OER overpotential at 100 mA cm-2	418 mV at 100 mA cm-2	—	—	Text Exact Reported	3 · OER performance · Fig. 4a
NiPc-NiFe0.20 OER overpotential at 10 mA cm-2	337 mV at 10 mA cm-2	—	—	Text Exact Reported	3 · OER performance · Fig. 4a
NiPc-NiFe0.20 Ni2+/Ni3+ oxidation peak	no oxidation peak found	—	—	Text Qualitative	3 · OER performance · Fig. S10
NiPc-NiFe0.20 TOF at eta = 300 mV	1.005 s-1 at eta = 300 mV	—	—	Text Exact Reported	4 · OER performance · Table S1

Linear sweep voltammetry (LSV) for OER

Voltammetry

NiPc-Fe/acetylene black/Nafion on glassy carbon electrode · Electrode

Oxygen-saturated 1.0 M KOH, three-electrode system, 298 K, 95% iR correction, 10 mV s-1, 1.07-1.87 V.

Temperature: 298
Atmosphere: oxygen-saturated
Geometry: glassy carbon disk working electrode, diameter 3 mm
Context: catalyst ink composite electrode
Measurement source: 3 · OER performance · Fig. 4a

Property	Reported value	Normalised value	Uncertainty	Origin and quality	Source
NiPc-Fe OER overpotential at 100 mA cm-2	474 mV at 100 mA cm-2	—	—	Text Exact Reported	3 · OER performance · Fig. 4a
NiPc-Fe OER overpotential at 10 mA cm-2	368 mV at 10 mA cm-2	—	—	Text Exact Reported	3 · OER performance · Fig. 4a

Linear sweep voltammetry (LSV) for OER

Voltammetry

NiPc-Ni/acetylene black/Nafion on glassy carbon electrode · Electrode

Oxygen-saturated 1.0 M KOH, three-electrode system, 298 K, 95% iR correction, 10 mV s-1, 1.07-1.87 V.

Temperature: 298
Atmosphere: oxygen-saturated
Geometry: glassy carbon disk working electrode, diameter 3 mm
Context: catalyst ink composite electrode
Measurement source: 3 · OER performance · Fig. 4a

Property	Reported value	Normalised value	Uncertainty	Origin and quality	Source
NiPc-Ni OER overpotential at 10 mA cm-2	427 mV at 10 mA cm-2	—	—	Text Exact Reported	3 · OER performance · Fig. 4a
NiPc-Ni Ni2+/Ni3+ oxidation peak potential	1.426 V	—	—	Text Exact Reported	3 · OER performance · Fig. S10

Linear sweep voltammetry (LSV) for OER

Voltammetry

Commercial RuO2 on glassy carbon electrode · Electrode

Commercial RuO2 benchmark before and after 1000 CV cycles in OER comparison.

Measurement source: 4 · OER performance · Fig. S16

Property	Reported value	Normalised value	Uncertainty	Origin and quality	Source
Commercial RuO2 OER overpotential after 1000 CV cycles	395 mV	—	—	Text Exact Reported	4 · OER performance · Fig. S16
Commercial RuO2 OER overpotential at 10 mA cm-2	317 mV @ 10 mA cm-2	—	—	Text Exact Reported	4 · OER performance · Fig. S16
Commercial RuO2 OER overpotential shift after 1000 CV cycles	78 mV	—	—	Figure Axis Rounded Reported	12 · Comparison with Commercial Catalyst · Figure S16

Chronoamperometry / chronopotentiometry stability

Galvanostatic cycling Chronoamperometry

NiPc-NiFe0.09 on carbon cloth · Electrode

Carbon-cloth supported NiPc-NiFe0.09 monitored for 15000 s; post-test XPS and PXRD/SEM checked stability.

Measurement source: 4 · OER performance · Fig. S13, Fig. S14

Property	Reported value	Normalised value	Uncertainty	Origin and quality	Source
NiPc-NiFe0.09@CC current stability	current scarcely decreases	—	—	Text Qualitative	4 · OER performance · Fig. S13
NiPc-NiFe0.09@CC chronoamperometry duration	15000 s	—	—	Text Exact Reported	4 · OER performance · Fig. S13

Cycling durability LSV

Voltammetry

NiPc-NiFe0.09/acetylene black/Nafion on glassy carbon electrode · Electrode

OER LSV before/after 1000 CV cycles at 50 mV s-1 and after 3000 CV cycles.

Measurement source: 4 · OER performance · Fig. 4d; Fig. S15

Property	Reported value	Normalised value	Uncertainty	Origin and quality	Source
NiPc-NiFe0.09 potential at 10 mA cm-2 after 3000 CV cycles	1.62 V at 10 mA cm-2	—	—	Figure Axis Approximate	11 · Stability Test · Figure S15
NiPc-NiFe0.09 OER shift after 1000 CV cycles at 10 mA cm-2	31 mV shift at eta @10 mA cm-2	—	—	Figure Axis Rounded Reported	12 · Comparison with Commercial Catalyst · Figure S16
NiPc-NiFe0.09 OER shift after 1000 CV cycles at 50 mA cm-2	33 mV shift at 50 mA cm-2	—	—	Text Exact Reported	4 · OER performance · Fig. 4d