Electrochemistry Application — Tri-Metallic Catalyst for Oxygen Evolution Reaction Enables Continuous Operation of Anion Exchange Membrane Electrolyzer at 1A cm−2 for Hundreds of Hours

17 measurement groups · 53 results

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

chronopotentiometry

Galvanostatic cycling

Fe10Ni45Co45 MOF-74 · Powder

Constant current 200 mA cm-2 in 1 M KOH; two segments separated by 1 h OCV.

Context: pristine MOF catalyst
Measurement source: 5-6 · 2.2 Electrocatalytic Activity Toward OER · Figure 3e

Property	Reported value	Normalised value	Uncertainty	Origin and quality	Source
Fe10Ni45Co45 potential at 70 h	1.695 V vs RHE	—	—	Text Exact Reported	6 · 2.2 Electrocatalytic Activity Toward OER · Figure 3e
Fe10Ni45Co45 first CP200 segment duration	70 h	—	—	Text Exact Reported	6 · 2.2 Electrocatalytic Activity Toward OER · Figure 3e
Fe10Ni45Co45 early CP200 potential after two hours	1.85 V vs RHE	—	—	Text Exact Reported	6 · 2.2 Electrocatalytic Activity Toward OER · Figure 3e
Fe10Ni45Co45 starting CP200 potential	1.68 V vs RHE	—	—	Text Exact Reported	6 · 2.2 Electrocatalytic Activity Toward OER · Figure 3e
Fe10Ni45Co45 total CP200 duration	150 h	—	—	Text Exact Reported	6 · 2.2 Electrocatalytic Activity Toward OER · Figure 3e

chronopotentiometry

Galvanostatic cycling

Ni5Co47.5Fe47.5 MOF-74 · Powder

Constant current 200 mA cm-2 in 1 M KOH; two segments separated by 1 h OCV.

Context: pristine MOF catalyst
Measurement source: 5-6 · 2.2 Electrocatalytic Activity Toward OER · Figure 3d

Property	Reported value	Normalised value	Uncertainty	Origin and quality	Source
Ni5Co47.5Fe47.5 first CP200 segment duration	60 h	—	—	Text Exact Reported	6 · 2.2 Electrocatalytic Activity Toward OER · Figure 3d
Ni5Co47.5Fe47.5 CP200 potential increase rate	0.83 mV h-1	—	—	Text Exact Reported	6 · 2.2 Electrocatalytic Activity Toward OER · Figure 3d
Ni5Co47.5Fe47.5 total CP200 duration	115 h	—	—	Text Exact Reported	6 · 2.2 Electrocatalytic Activity Toward OER · Figure 3d

cyclic voltammetry-derived double-layer capacitance

Voltammetry

Co100-2xNixFex MOF-74 composition series · Powder

CV scans at 10, 20, 40, 60, 80 and 100 mV s-1; slope of current density versus scan rate used as Cdl/ECSA proxy.

Context: pristine MOF catalyst
Measurement source: 4-5 · 2.2 Electrocatalytic Activity Toward OER · Figure 2f

Property	Reported value	Normalised value	Uncertainty	Origin and quality	Source
Co10Ni45Fe45 Cdl/ECSA proxy	35.4 mF cm-2	—	—	Figure Axis Rounded Reported	4 · 2.2 Electrocatalytic Activity Toward OER · Figure 2f
Co50Ni25Fe25 Cdl/ECSA proxy	56.1 mF cm-2	—	—	Figure Axis Rounded Reported	4 · 2.2 Electrocatalytic Activity Toward OER · Figure 2f
Co90Ni5Fe5 Cdl/ECSA proxyMarked as a best value within this paper	465 mF cm-2	—	—	Text Exact Reported	5 · 2.2 Electrocatalytic Activity Toward OER · Figure 2f

cyclic voltammetry-derived double-layer capacitance

Voltammetry

Fe100-2xNixCox MOF-74 composition series · Powder

CV scans at 10, 20, 40, 60, 80 and 100 mV s-1; slope of current density versus scan rate used as Cdl/ECSA proxy.

Context: pristine MOF catalyst
Measurement source: 4-5 · 2.2 Electrocatalytic Activity Toward OER · Figure 2e

Property	Reported value	Normalised value	Uncertainty	Origin and quality	Source
Fe10Ni45Co45 Cdl/ECSA proxyMarked as a best value within this paper	87.9 mF cm-2	—	—	Text Exact Reported	5 · 2.2 Electrocatalytic Activity Toward OER · Figure 2e
Fe50Ni25Co25 Cdl/ECSA proxy	21.9 mF cm-2	—	—	Text Exact Reported	5 · 2.2 Electrocatalytic Activity Toward OER · Figure 2e
Fe80Ni10Co10 Cdl/ECSA proxy	19.2 mF cm-2	—	—	Text Exact Reported	5 · 2.2 Electrocatalytic Activity Toward OER · Figure 2e

cyclic voltammetry-derived double-layer capacitance

Voltammetry

Ni100-2xCoxFex MOF-74 composition series · Powder

CV scans at 10, 20, 40, 60, 80 and 100 mV s-1; slope of current density versus scan rate used as Cdl/ECSA proxy.

Context: pristine MOF catalyst
Measurement source: 4-5 · 2.2 Electrocatalytic Activity Toward OER · Figure 2d

Property	Reported value	Normalised value	Uncertainty	Origin and quality	Source
Ni50Co25Fe25 Cdl/ECSA proxy	26.6 mF cm-2	—	—	Text Exact Reported	5 · 2.2 Electrocatalytic Activity Toward OER · Figure 2d
Ni5Co47.5Fe47.5 Cdl/ECSA proxyMarked as a best value within this paper	68.7 mF cm-2	—	—	Text Exact Reported	5 · 2.2 Electrocatalytic Activity Toward OER · Figure 2d
Ni80Co10Fe10 Cdl/ECSA proxy	15.5 mF cm-2	—	—	Text Exact Reported	5 · 2.2 Electrocatalytic Activity Toward OER · Figure 2d

electrochemical impedance spectroscopy

Impedance spectroscopy

Co100-2xNixFex MOF-74 composition series · Powder

Oxygen-free 1 M KOH; 1.65 V vs RHE; 200 kHz to 100 mHz; 6 points per decade.

Context: pristine MOF catalyst
Measurement source: 5-6 · 2.2 Electrocatalytic Activity Toward OER · Figure 3c

Property	Reported value	Normalised value	Uncertainty	Origin and quality	Source
Co90 vs Co10 EIS improvement	9 times larger Co loading only enhanced charge-transfer kinetics by double	—	—	Text Approximate	6 · 2.2 Electrocatalytic Activity Toward OER · Figure 3c

electrochemical impedance spectroscopy

Impedance spectroscopy

Fe100-2xNixCox MOF-74 composition series · Powder

Oxygen-free 1 M KOH; 1.65 V vs RHE; 200 kHz to 100 mHz; 6 points per decade.

Context: pristine MOF catalyst
Measurement source: 5-6 · 2.2 Electrocatalytic Activity Toward OER · Figure 3b

Property	Reported value	Normalised value	Uncertainty	Origin and quality	Source
Fe80 vs Fe10 EIS x-axis intercept ratio	EIS of Fe80Ni10Co10 is approximately 430% compared to Fe10Ni45Co45	—	—	Text Approximate	6 · 2.2 Electrocatalytic Activity Toward OER · Figure 3b

electrochemical impedance spectroscopy

Impedance spectroscopy

Ni100-2xCoxFex MOF-74 composition series · Powder

Oxygen-free 1 M KOH; 1.65 V vs RHE; 200 kHz to 100 mHz; 6 points per decade.

Context: pristine MOF catalyst
Measurement source: 5-6 · 2.2 Electrocatalytic Activity Toward OER · Figure 3a

Property	Reported value	Normalised value	Uncertainty	Origin and quality	Source
Ni80 vs Ni10 EIS resistance ratio	Ni80Co10Fe10 resistance almost double Ni10Co45Fe45	—	—	Text Approximate	6 · 2.2 Electrocatalytic Activity Toward OER · Figure 3a

linear sweep voltammetry

Voltammetry

Co100-2xNixFex MOF-74 composition series · Powder

O2-free 1 M KOH; N2 bubbled at least 45 min; Hg/HgO reference; Pt foil counter; scan rate 5 mV s-1; non-IR-compensated.

Context: pristine MOF catalyst
Measurement source: 3-4 · 2.2 Electrocatalytic Activity Toward OER · Figure 2c

Property	Reported value	Normalised value	Uncertainty	Origin and quality	Source
Co 50 wt.% overpotential improvement versus IrO2	reduction in overpotential by 44 mV compared to IrO2	—	—	Text Exact Reported	4 · 2.2 Electrocatalytic Activity Toward OER · Figure 2c
Co 90 wt.% overpotential improvement versus IrO2Marked as a best value within this paper	reduction in overpotential by 68 mV compared to IrO2	—	—	Text Exact Reported	4 · 2.2 Electrocatalytic Activity Toward OER · Figure 2c

linear sweep voltammetry

Voltammetry

Fe100-2xNixCox MOF-74 composition series · Powder

O2-free 1 M KOH; N2 bubbled at least 45 min; Hg/HgO reference; Pt foil counter; scan rate 5 mV s-1; non-IR-compensated.

Context: pristine MOF catalyst
Measurement source: 3-4 · 2.2 Electrocatalytic Activity Toward OER · Figure 2b

Property	Reported value	Normalised value	Uncertainty	Origin and quality	Source
Fe10Ni45Co45 overpotential at 10 mA cm-2Marked as a best value within this paper	250 mV	—	—	Text Exact Reported	3 · 2.2 Electrocatalytic Activity Toward OER · Figure 2b
Fe 10 wt.% overpotential improvement versus IrO2Marked as a best value within this paper	enhancement by 62 mV compared to IrO2	—	—	Text Exact Reported	3 · 2.2 Electrocatalytic Activity Toward OER · Figure 2b
Fe 20 wt.% overpotential improvement versus IrO2	enhancement by 59 mV compared to IrO2	—	—	Text Exact Reported	3 · 2.2 Electrocatalytic Activity Toward OER · Figure 2b
Fe 50 wt.% overpotential improvement versus IrO2	enhancement by 30 mV compared to IrO2	—	—	Text Exact Reported	3 · 2.2 Electrocatalytic Activity Toward OER · Figure 2b

linear sweep voltammetry

Voltammetry

Ni100-2xCoxFex MOF-74 composition series · Powder

O2-free 1 M KOH; N2 bubbled at least 45 min; Hg/HgO reference; Pt foil counter; scan rate 5 mV s-1; non-IR-compensated.

Context: pristine MOF catalyst
Measurement source: 3-4 · 2.2 Electrocatalytic Activity Toward OER · Figure 2a

Property	Reported value	Normalised value	Uncertainty	Origin and quality	Source
Ni 10 wt.% overpotential improvement versus IrO2	lower by 40 mV compared to IrO2	—	—	Text Exact Reported	3 · 2.2 Electrocatalytic Activity Toward OER · Figure 2a
Ni5Co47.5Fe47.5 overpotential at 10 mA cm-2Marked as a best value within this paper	260 mV	—	—	Text Exact Reported	3 · 2.2 Electrocatalytic Activity Toward OER · Figure 2a
Ni 5 wt.% overpotential improvement versus IrO2Marked as a best value within this paper	lower by 70 mV compared to IrO2	—	—	Text Exact Reported	3 · 2.2 Electrocatalytic Activity Toward OER · Figure 2a

AEMEC full-cell MEA chronopotentiometry

Galvanostatic cycling

Binary Fe-Co MOF-74 MEA anode catalyst · Electrode

MOF OER catalyst at anode; commercial Pt/carbon HER catalyst cathode; 0.1 M NaOH anolyte; 60 C; 750 mA cm-2.

Context: pristine MOF catalyst
Measurement source: 9 · 2.4 Full Cell Membrane Electrode Assembly Testing · Figure 5a

Property	Reported value	Normalised value	Uncertainty	Origin and quality	Source
Binary Fe-Co MEA good-performance duration	90 h	—	—	Text Exact Reported	9 · 2.4 Full Cell Membrane Electrode Assembly Testing · Figure 5a
Binary Fe-Co MEA initial voltage at 750 mA cm-2	initially at 2 V	—	—	Text Rounded Reported	9 · 2.4 Full Cell Membrane Electrode Assembly Testing · Figure 5a

AEMEC full-cell MEA chronopotentiometry

Galvanostatic cycling

Fe10Ni45Co45 MOF-74 MEA anode catalyst · Electrode

MOF-74 anode catalyst; commercial Pt/carbon cathode; 0.1 M NaOH; 60 C; 750 then 1000 mA cm-2.

Context: pristine MOF catalyst
Measurement source: 9-10 · 2.4 Full Cell Membrane Electrode Assembly Testing · Figure 5b

Property	Reported value	Normalised value	Uncertainty	Origin and quality	Source
Fe10Ni45Co45 MEA voltage at first 100 h	1.9 V	—	—	Text Rounded Reported	9 · 2.4 Full Cell Membrane Electrode Assembly Testing · Figure 5b
Fe10Ni45Co45 MEA voltage at 200 h	1.8 V	—	—	Text Rounded Reported	9 · 2.4 Full Cell Membrane Electrode Assembly Testing · Figure 5b
Fe10Ni45Co45 additional slow-degradation period	additional 100 h	—	—	Text Exact Reported	9 · 2.4 Full Cell Membrane Electrode Assembly Testing · Figure 5b
Fe10Ni45Co45 high MEA current density	1000 mA cm-2	—	—	Text Exact Reported	9 · 2.4 Full Cell Membrane Electrode Assembly Testing · Figure 5b
Fe10Ni45Co45 initial MEA current density	750 mA cm-2	—	—	Text Exact Reported	9 · 2.4 Full Cell Membrane Electrode Assembly Testing · Figure 5b
Fe10Ni45Co45 MEA decay rate after stable run	0.4 uV h-1	—	—	Text Exact Reported	9 · 2.4 Full Cell Membrane Electrode Assembly Testing · Figure 5b
Fe10Ni45Co45 stable MEA operation durationMarked as a best value within this paper	550 h	—	—	Text Exact Reported	9 · 2.4 Full Cell Membrane Electrode Assembly Testing · Figure 5b
Fe10Ni45Co45 MEA initial voltage	2 V	—	—	Text Rounded Reported	9 · 2.4 Full Cell Membrane Electrode Assembly Testing · Figure 5b
Fe10Ni45Co45 stable voltage upper bound at 1000 mA cm-2	1.95 V	—	—	Text Rounded Reported	9 · 2.4 Full Cell Membrane Electrode Assembly Testing · Figure 5b
Fe10Ni45Co45 stable voltage lower bound at 1000 mA cm-2	1.9 V	—	—	Text Rounded Reported	9 · 2.4 Full Cell Membrane Electrode Assembly Testing · Figure 5b
Fe10Ni45Co45 voltage jump after current increase	1.8 V to 1.9 V, approximately 5%	—	—	Text Approximate	9 · 2.4 Full Cell Membrane Electrode Assembly Testing · Figure 5b

steady-state polarisation curve

Fe10Ni45Co45 MOF-74 MEA anode catalyst · Electrode

Beginning-of-life and end-of-life steady-state polarisation curves for the Fe10Ni45Co45 MEA cell.

Context: pristine MOF catalyst
Measurement source: 9-10 · 2.4 Full Cell Membrane Electrode Assembly Testing · Figure 5c

Property	Reported value	Normalised value	Uncertainty	Origin and quality	Source
BOL current density at 1.8 V	0.37 A cm-2 at 1.8 V	—	—	Text Exact Reported	9-10 · 2.4 Full Cell Membrane Electrode Assembly Testing · Figure 5c
EOL current density at 1.8 VMarked as a best value within this paper	0.72 A cm-2 at 1.8 V	—	—	Text Exact Reported	9-10 · 2.4 Full Cell Membrane Electrode Assembly Testing · Figure 5c

AEMEC full-cell MEA chronopotentiometry

Galvanostatic cycling

Ni10Co45Fe45 MOF-74 · Powder

Identical MEA full-cell setup to binary Fe-Co comparator; 750 mA cm-2.

Context: pristine MOF catalyst
Measurement source: 9 · 2.4 Full Cell Membrane Electrode Assembly Testing · Figure 5a

Property	Reported value	Normalised value	Uncertainty	Origin and quality	Source
Ni10Co45Fe45 MEA voltage within first 10 h	1.9 V	—	—	Text Rounded Reported	9 · 2.4 Full Cell Membrane Electrode Assembly Testing · Figure 5a
Ni10Co45Fe45 MEA voltage at 50 h	1.95 V	—	—	Text Rounded Reported	9 · 2.4 Full Cell Membrane Electrode Assembly Testing · Figure 5a
Ni10Co45Fe45 MEA kickoff voltage	2.09 V	—	—	Text Exact Reported	9 · 2.4 Full Cell Membrane Electrode Assembly Testing · Figure 5a

AEMEC MEA comparison table

Fe10Ni45Co45 MOF-74 MEA anode catalyst · Electrode

MEA configuration comparison table for Fe10Ni45Co45 this-work catalyst.

Temperature: 333
Atmosphere: 0.1 M NaOH anode electrolyte flow; main text reports cell temperature 60 C
Geometry: AEMEC membrane electrode assembly
Context: MOF catalyst in MEA anode electrode
Measurement source: 21 · Table S3

Property	Reported value	Normalised value	Uncertainty	Origin and quality	Source
Fe10Ni45Co45 MEA stability at 1000 mA cm-2 from SI Table S3Marked as a best value within this paper	350 hr @ 1000 mA/cm2	—	—	SI Table Exact Reported	21 · Table S3
Fe10Ni45Co45 MEA stability at 750 mA cm-2 from SI Table S3Marked as a best value within this paper	200 hr @ 750 mA/cm2	—	—	SI Table Exact Reported	21 · Table S3
Fe10Ni45Co45 MEA cell voltage at 1000 mA cm-2 from SI Table S3Marked as a best value within this paper	1.9 V @ 1000 mA/cm2	—	—	SI Table Exact Reported	21 · Table S3
Fe10Ni45Co45 MEA cell voltage at 750 mA cm-2 from SI Table S3Marked as a best value within this paper	1.8 V @ 750 mA/cm2	—	—	SI Table Exact Reported	21 · Table S3

3-electrode OER comparison table

Fe10Ni45Co45 MOF-74 · Powder

Alkaline OER performance comparison; this-work row reports Fe10Ni45Co45 overpotential and CP stability.

Atmosphere: alkaline medium; main text specifies O2-free 1 M KOH for study measurements
Geometry: 3-electrode setup
Context: pristine MOF catalyst powder/electrode for OER testing
Measurement source: 20 · Table S2

Property	Reported value	Normalised value	Uncertainty	Origin and quality	Source
Fe10Ni45Co45 overpotential at 10 mA cm-2 from SI comparison tableMarked as a best value within this paper	250 mV at 10 mA/cm2	—	—	SI Table Exact Reported	20 · Table S2
Fe10Ni45Co45 CP200 stability from SI comparison tableMarked as a best value within this paper	150 hr @ 200 mA/cm2	—	—	SI Table Exact Reported	20 · Table S2