Electrochemistry Application — Ultrafast transformation of metal-organic frameworks into advanced oxygen evolution electrocatalysts with good universality and scalability

Measurement evidence

Electrochemistry Application

Ultrafast transformation of metal-organic frameworks into advanced oxygen evolution electrocatalysts with good universality and scalability · Yu L., Xiao J., Huang C. et al. · Journal of Materials Chemistry A · 2022 · 17552-17560

8 measurement groups · 35 results

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

AEM CO2 reduction flow electrolyser

Fe-CoNi MOFs AEM electrolyser anode · Electrode

6 M KOH, 60 deg C; Ag on PTFE cathode for CO2RR and Fe-CoNi MOFs OER anode; IrO2 benchmark.

Temperature: 333
Atmosphere: CO2 reduction cell
Geometry: AEM flow electrolyser
Context: Device application test.
Measurement source: S5 · AEM electrolyser test · Fig. 5d-f

Property	Reported value	Normalised value	Uncertainty	Origin and quality	Source
AEM CO2 reduction electrolyser stabilityMarked as a best value within this paper	3 h at 300 mA cm^-2	—	—	Text Exact Reported	17559 · Results and discussion · Fig. 5f
AEM CO2 reduction electrolyser cell voltage at 1 A cm^-2Marked as a best value within this paper	3.48 V	—	—	Text Exact Reported	17559 · Results and discussion · Fig. 5e

AEM water splitting flow electrolyser

Fe-CoNi MOFs AEM electrolyser anode · Electrode

6 M KOH, 60 deg C; Pt mesh cathode for HER and Fe-CoNi MOFs OER anode; IrO2 benchmark.

Temperature: 333
Geometry: AEM flow electrolyser
Context: Device application test.
Measurement source: S5 · AEM electrolyser test · Fig. 5a-c

Property	Reported value	Normalised value	Uncertainty	Origin and quality	Source
AEM water electrolyser stabilityMarked as a best value within this paper	more than 40 h at 500 mA cm^-2	—	more than	Text Approximate	17559 · Results and discussion · Fig. 5c
AEM water electrolyser cell voltage at 1 A cm^-2Marked as a best value within this paper	2.85 V	—	—	Text Exact Reported	17559 · Results and discussion · Fig. 5b

Double-layer capacitance and ECSA from CV

Fe-CoNi MOFs on Ni foam, 0.10 M Fe(NO3)3 · Electrode

CV curves recorded from 5 to 25 mV s^-1 with 5 mV s^-1 interval; ECSA = Cdl/Cs with Cs = 40 uF cm^-2.

Geometry: Ni foam-supported electrode
Context: Fe-CoNi MOFs compared with CoNi MOFs.
Measurement source: S4 and S27 · Electrochemical tests; Fig. S21 · Fig. S20-S21

Property	Reported value	Normalised value	Uncertainty	Origin and quality	Source
CoNi MOFs Cdl	1.23 mF cm^-2	—	—	Text Exact Reported	17555 · Results and discussion · Fig. S21
Fe-CoNi MOFs CdlMarked as a best value within this paper	2.36 mF cm^-2	—	—	Text Exact Reported	17555 · Results and discussion · Fig. S21
CoNi MOFs calculated ECSA	30.75 cm^2	—	—	Calculated From Reported Exact Reported	S27 · Fig. S21 · Fig. S21
Fe-CoNi MOFs calculated ECSAMarked as a best value within this paper	59 cm^2	—	—	Calculated From Reported Exact Reported	S27 · Fig. S21 · Fig. S21

O2 Faradaic efficiency and long-term OER stability

Fe-CoNi MOFs on Ni foam, 0.10 M Fe(NO3)3 · Electrode

Faradaic efficiency from produced O2 at 100 mA cm^-2; stability at 10 and 100 mA cm^-2.

Geometry: OER electrode in 1 M KOH
Context: Target Fe-CoNi MOFs.
Measurement source: 17556 · Results and discussion · Fig. 3g-h

Property	Reported value	Normalised value	Uncertainty	Origin and quality	Source
Fe-CoNi MOFs average Faradaic efficiency for O2 evolutionMarked as a best value within this paper	97.9%	—	—	Text Exact Reported	17556 · Results and discussion · Fig. 3g
Fe-CoNi MOFs degradation rate at 100 mA cm^-2Marked as a best value within this paper	0.24 mV h^-1	—	—	Text Exact Reported	17556 · Results and discussion · Fig. 3h
Fe-CoNi MOFs overpotential increase at 100 mA cm^-2Marked as a best value within this paper	~24 mV over 100 h	—	—	Text Approximate	17556 · Results and discussion · Fig. 3h
Fe-CoNi MOFs stability at 10 mA cm^-2Marked as a best value within this paper	100 h with no obvious attenuation	—	—	Text Exact Reported	17556 · Results and discussion · Fig. 3h

OER overpotential versus Fe(NO3)3 concentration

Fe-CoNi MOFs on Ni foam, 0.10 M Fe(NO3)3 · Electrode

Fe-CoNi MOFs prepared with 0.05, 0.10, 0.15 and 0.20 M Fe(NO3)3; overpotential compared at 100 mA cm^-2.

Geometry: Ni foam-supported electrode
Context: Fe concentration optimisation.
Measurement source: S24 · Supplementary figures · Fig. S18

Property	Reported value	Normalised value	Uncertainty	Origin and quality	Source
0.05 M Fe(NO3)3 variant overpotential at 100 mA cm^-2	372 mV	—	—	Figure Axis Rounded Reported	S24 · Fig. S18 · Fig. S18b
0.10 M Fe(NO3)3 variant overpotential at 100 mA cm^-2Marked as a best value within this paper	330 mV	—	—	Figure Axis Rounded Reported	17555 · Results and discussion · Fig. S18
0.15 M Fe(NO3)3 variant overpotential at 100 mA cm^-2	334 mV	—	—	Figure Axis Rounded Reported	S24 · Fig. S18 · Fig. S18b
0.20 M Fe(NO3)3 variant overpotential at 100 mA cm^-2	353 mV	—	—	Figure Axis Rounded Reported	S24 · Fig. S18 · Fig. S18b

OER polarisation and Tafel analysis

Tafel and polarisation analysis

Fe-CoNi MOFs on Ni foam, 0.10 M Fe(NO3)3 · Electrode

1 M KOH, room temperature, three-electrode set-up, graphite rod counter, Hg/HgO reference; curves with 85% iR compensation unless otherwise stated.

Temperature: room temperature
Geometry: Ni foam-supported working electrode
Context: Target Fe-CoNi MOFs compared with pristine CoNi MOFs, Ni foam and RuO2.
Measurement source: S4-S5 · Electrochemical tests · Fig. 3a-b

Property	Reported value	Normalised value	Uncertainty	Origin and quality	Source
CoNi MOFs overpotential at 10 mA cm^-2	290 mV	—	—	Text Exact Reported	17555 · Results and discussion · Fig. 3a inset
Fe-CoNi MOFs overpotential at 10 mA cm^-2Marked as a best value within this paper	230 mV	—	—	Text Exact Reported	17555 · Results and discussion · Fig. 3a inset
Ni foam overpotential at 10 mA cm^-2	352 mV	—	—	Text Exact Reported	17555 · Results and discussion · Fig. 3a inset
RuO2 overpotential at 10 mA cm^-2	310 mV	—	—	Calculated From Reported Exact Reported	17555 · Results and discussion · Fig. 3a inset
CoNi MOFs Tafel slope	127.8 mV dec^-1	—	—	Text Exact Reported	17555 · Results and discussion · Fig. 3b
Fe-CoNi MOFs Tafel slopeMarked as a best value within this paper	53.7 mV dec^-1	—	—	Text Exact Reported	17555 · Results and discussion · Fig. 3b
Ni foam Tafel slope	254.7 mV dec^-1	—	—	Text Exact Reported	17555 · Results and discussion · Fig. 3b
RuO2 Tafel slope	93.6 mV dec^-1	—	—	Text Exact Reported	17555 · Results and discussion · Fig. 3b

Turnover frequency calculation

Fe-CoNi MOFs on Ni foam, 0.10 M Fe(NO3)3 · Electrode

TOF calculated from current density, geometric area, Faraday constant and active sites estimated from Cdl.

Geometry: Ni foam-supported electrode
Context: Fe-CoNi MOFs compared with CoNi MOFs and literature.
Measurement source: S4 and S29-S30 · Electrochemical tests; Fig. S23 · Fig. S23

Property	Reported value	Normalised value	Uncertainty	Origin and quality	Source
Fe-CoNi MOFs estimated active sitesMarked as a best value within this paper	1.18 x 10^17 surface sites cm^-2	—	—	Calculated From Reported Rounded Reported	S29 · Fig. S23 · Fig. S23
CoNi MOFs TOF at 340 mV overpotential	0.703 s^-1	—	—	Text Exact Reported	17556 · Results and discussion · Fig. S23; Fig. 3e
Fe-CoNi MOFs TOF at 340 mV overpotentialMarked as a best value within this paper	2.75 s^-1	—	—	Text Exact Reported	17556 · Results and discussion · Fig. S23; Fig. 3e

OER overpotential comparison for CoM/Fe-CoM MOFs

Fe-CoCu MOFs · Electrode

Overpotential at 10 mA cm^-2 for M = Cu, Mn, Cd and Zn from Fig. 3d.

Geometry: MOF electrodes
Context: Pristine CoM MOFs versus Fe-incorporated counterparts.
Measurement source: 17556 · Fig. 3 caption · Fig. 3d

Property	Reported value	Normalised value	Uncertainty	Origin and quality	Source
CoCd MOFs overpotential at 10 mA cm^-2	371 mV	—	—	Figure Axis Rounded Reported	17556 · Fig. 3 caption · Fig. 3d
CoCu MOFs overpotential at 10 mA cm^-2	328 mV	—	—	Figure Axis Rounded Reported	17556 · Fig. 3 caption · Fig. 3d
CoMn MOFs overpotential at 10 mA cm^-2	346 mV	—	—	Figure Axis Rounded Reported	17556 · Fig. 3 caption · Fig. 3d
CoZn MOFs overpotential at 10 mA cm^-2	414 mV	—	—	Figure Axis Rounded Reported	17556 · Fig. 3 caption · Fig. 3d
Fe-CoCd MOFs overpotential at 10 mA cm^-2Marked as a best value within this paper	252 mV	—	—	Figure Axis Rounded Reported	17556 · Fig. 3 caption · Fig. 3d
Fe-CoCu MOFs overpotential at 10 mA cm^-2	257 mV	—	—	Figure Axis Rounded Reported	17556 · Fig. 3 caption · Fig. 3d
Fe-CoMn MOFs overpotential at 10 mA cm^-2	283 mV	—	—	Figure Axis Rounded Reported	17556 · Fig. 3 caption · Fig. 3d
Fe-CoZn MOFs overpotential at 10 mA cm^-2	349 mV	—	—	Figure Axis Rounded Reported	17556 · Fig. 3 caption · Fig. 3d