Electrochemistry Application — Engineering defective trimetallic metal-organic framework nanosheets for advanced water oxidation electrocatalysis

14 measurement groups · 35 results

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

cyclic voltammetry double-layer capacitance

Voltammetry

NiFeZn MOF nanosheets · Nanosheet

non-Faradaic CV; scan rates 10, 20, 30, 40 mV/s; 1.1-1.2 V vs RHE

Context: pristine MOF nanosheet catalyst/electrode ink unless otherwise noted
Measurement source: 4 · Results and discussion 3.2 · Fig. 4d and Fig. S9

Property	Reported value	Normalised value	Uncertainty	Origin and quality	Source
Fe MOF double-layer capacitance Cdl	0.27 mF cm-2	—	—	Text Exact Reported	4 · Results and discussion 3.2 · Fig. 4d
Ni MOF double-layer capacitance Cdl	0.12 mF cm-2	—	—	Text Exact Reported	4 · Results and discussion 3.2 · Fig. 4d
NiFe MOF double-layer capacitance Cdl	0.19 mF cm-2	—	—	Text Exact Reported	4 · Results and discussion 3.2 · Fig. 4d
double-layer capacitance CdlMarked as a best value within this paper	0.82 mF cm-2	—	—	Figure Axis Rounded Reported	4 · Results and discussion 3.2 · Fig. 4d

three-electrode OER testing protocol

NiFeZn MOF nanosheets · Nanosheet

GC working electrode; Hg/HgO reference; graphite counter; O2-saturated 1.0 M KOH; LSV 5 mV/s; room temperature; activation CV for 60 cycles

Context: pristine MOF nanosheet catalyst/electrode ink unless otherwise noted
Measurement source: 2 · Electrochemical measurements

Property	Reported value	Normalised value	Uncertainty	Origin and quality	Source

electrochemical impedance spectroscopy

Impedance spectroscopy

NiFeZn MOF nanosheets · Nanosheet

1 M KOH; 1.6 V vs RHE; 10 mV amplitude; 10 kHz to 100 mHz

Context: pristine MOF nanosheet catalyst/electrode ink unless otherwise noted
Measurement source: 8 · Electrochemical measurements · Fig. S10

Property	Reported value	Normalised value	Uncertainty	Origin and quality	Source
relative charge-transfer resistance	NiFeZn semicircular diameter much smaller than Ni, Fe and NiFe MOFs	—	—	Text Qualitative	4 · Results and discussion 3.2 · Fig. S10

linear sweep voltammetry

Voltammetry

Fe MOF nanosheets · Nanosheet

1 M KOH; 5 mV/s; OER comparison control

Context: pristine MOF nanosheet catalyst/electrode ink unless otherwise noted
Measurement source: 4 · Results and discussion 3.2 · Fig. 4a-b

Property	Reported value	Normalised value	Uncertainty	Origin and quality	Source
current density at 1.53 V vs RHE	0.5 mA cm-2	—	—	Text Exact Reported	4 · Results and discussion 3.2 · Fig. 4b
OER overpotential at 10 mA cm-2	498 mV	—	—	Text Exact Reported	4 · Results and discussion 3.2 · Fig. 4b

linear sweep voltammetry

Voltammetry

Ni MOF nanosheets · Nanosheet

1 M KOH; 5 mV/s; OER comparison control

Context: pristine MOF nanosheet catalyst/electrode ink unless otherwise noted
Measurement source: 4 · Results and discussion 3.2 · Fig. 4a-b

Property	Reported value	Normalised value	Uncertainty	Origin and quality	Source
current density at 1.53 V vs RHE	2.6 mA cm-2	—	—	Text Exact Reported	4 · Results and discussion 3.2 · Fig. 4b
OER overpotential at 10 mA cm-2	454 mV	—	—	Text Exact Reported	4 · Results and discussion 3.2 · Fig. 4b

linear sweep voltammetry

Voltammetry

NiFe MOF nanosheets · Nanosheet

1 M KOH; 5 mV/s; OER comparison control

Context: pristine MOF nanosheet catalyst/electrode ink unless otherwise noted
Measurement source: 4 · Results and discussion 3.2 · Fig. 4a-b

Property	Reported value	Normalised value	Uncertainty	Origin and quality	Source
OER overpotential at 10 mA cm-2	284 mV	—	—	Text Exact Reported	4 · Results and discussion 3.2 · Fig. 4b

linear sweep voltammetry and Tafel analysis

Voltammetry Tafel and polarisation analysis

NiFeCd MOF nanosheets · Nanosheet

1 M KOH; OER at 10 mA cm-2; Tafel slope

Context: pristine MOF nanosheet catalyst/electrode ink unless otherwise noted
Measurement source: 5 · Results and discussion 3.4 · Fig. 7

Property	Reported value	Normalised value	Uncertainty	Origin and quality	Source
NiFeCd current density at 1.53 V vs RHE	approximately 20 mA cm-2	—	—	Visual Estimate Approximate	6 · Results and discussion 3.4 · Fig. 7b
NiFeCd overpotential at 10 mA cm-2	274 mV	—	—	Text Exact Reported	5 · Results and discussion 3.4 · Fig. 7b
NiFeM comparison CA durability	outstanding electrochemical stability with less activity decay	—	—	Text Qualitative	5 · Results and discussion 3.4 · Fig. 7d
NiFeCd Tafel slope	64.1 mV dec-1	—	—	Text Exact Reported	5 · Results and discussion 3.4 · Fig. 7c

linear sweep voltammetry and Tafel analysis

Voltammetry Tafel and polarisation analysis

NiFeCu MOF nanosheets · Nanosheet

1 M KOH; OER at 10 mA cm-2; Tafel slope

Context: pristine MOF nanosheet catalyst/electrode ink unless otherwise noted
Measurement source: 5 · Results and discussion 3.4 · Fig. 7

Property	Reported value	Normalised value	Uncertainty	Origin and quality	Source
NiFeCu current density at 1.53 V vs RHE	approximately 15 mA cm-2	—	—	Visual Estimate Approximate	6 · Results and discussion 3.4 · Fig. 7b
NiFeCu overpotential at 10 mA cm-2	238 mV	—	—	Text Exact Reported	5 · Results and discussion 3.4 · Fig. 7b
NiFeCu Tafel slope	55.9 mV dec-1	—	—	Text Exact Reported	5 · Results and discussion 3.4 · Fig. 7c

linear sweep voltammetry and Tafel analysis

Voltammetry Tafel and polarisation analysis

NiFeMn MOF nanosheets · Nanosheet

1 M KOH; OER at 10 mA cm-2; Tafel slope

Context: pristine MOF nanosheet catalyst/electrode ink unless otherwise noted
Measurement source: 5 · Results and discussion 3.4 · Fig. 7

Property	Reported value	Normalised value	Uncertainty	Origin and quality	Source
NiFeMn current density at 1.53 V vs RHE	approximately 20 mA cm-2	—	—	Visual Estimate Approximate	6 · Results and discussion 3.4 · Fig. 7b
NiFeMn overpotential at 10 mA cm-2	251 mV	—	—	Text Exact Reported	5 · Results and discussion 3.4 · Fig. 7b
NiFeMn Tafel slope	71.8 mV dec-1	—	—	Text Exact Reported	5 · Results and discussion 3.4 · Fig. 7c

linear sweep voltammetry and Tafel analysis

Voltammetry Tafel and polarisation analysis

NiFePb MOF nanosheets · Nanosheet

1 M KOH; OER at 10 mA cm-2; Tafel slope

Context: pristine MOF nanosheet catalyst/electrode ink unless otherwise noted
Measurement source: 5 · Results and discussion 3.4 · Fig. 7

Property	Reported value	Normalised value	Uncertainty	Origin and quality	Source
NiFePb current density at 1.53 V vs RHE	approximately 19 mA cm-2	—	—	Visual Estimate Approximate	6 · Results and discussion 3.4 · Fig. 7b
NiFePb overpotential at 10 mA cm-2	271 mV	—	—	Text Exact Reported	5 · Results and discussion 3.4 · Fig. 7b
NiFePb Tafel slope	48.0 mV dec-1	—	—	Text Exact Reported	5 · Results and discussion 3.4 · Fig. 7c

linear sweep voltammetry

Voltammetry

NiFeZn MOF nanosheets · Nanosheet

1 M KOH; 5 mV/s; OER overpotential at 10 mA cm-2 and current density at 1.53 V vs RHE

Context: pristine MOF nanosheet catalyst/electrode ink unless otherwise noted
Measurement source: 4 · Results and discussion 3.2 · Fig. 4a-b

Property	Reported value	Normalised value	Uncertainty	Origin and quality	Source
current density at 1.53 V vs RHEMarked as a best value within this paper	31.1 mA cm-2	—	—	Text Exact Reported	4 · Results and discussion 3.2 · Fig. 4b
OER overpotential at 10 mA cm-2Marked as a best value within this paper	233 mV	—	—	Text Exact Reported	4 · Results and discussion 3.2 · Fig. 4a-b

linear sweep voltammetry and chronoamperometry

Voltammetry Chronoamperometry

NiFeZn-1 MOF nanosheets · Nanosheet

NiFeZn-1/NiFeZn-5; 1 M KOH; LSV 5 mV/s; CA at 1.5 V vs RHE

Context: pristine MOF nanosheet catalyst/electrode ink unless otherwise noted
Measurement source: 5 · Results and discussion 3.2 · Fig. S11

Property	Reported value	Normalised value	Uncertainty	Origin and quality	Source
NiFeZn-1 overpotential at 10 mA cm-2	248 mV	—	—	Text Exact Reported	5 · Results and discussion 3.2 · Fig. S11a
NiFeZn-5 overpotential at 10 mA cm-2	267 mV	—	—	Text Exact Reported	5 · Results and discussion 3.2 · Fig. S11a
NiFeZn-1/NiFeZn-5 CA durability	high catalytic activity maintained after successive 25000 s CA tests	—	—	Text Qualitative	5 · Results and discussion 3.2 · Fig. S11b

CV cycling, chronoamperometry, chronopotentiometry

Voltammetry Galvanostatic cycling Chronoamperometry

NiFeZn MOF nanosheets · Nanosheet

3000 CV cycles; CA at 1.5 V vs RHE; CP at 10 mA cm-2

Context: pristine MOF nanosheet catalyst/electrode ink unless otherwise noted
Measurement source: 5 · Results and discussion 3.2 · Fig. 5

Property	Reported value	Normalised value	Uncertainty	Origin and quality	Source
CA retained current density after 21 h at 1.5 V vs RHE	5.9 mA cm-2 after 21 h	—	—	Text Exact Reported	4 · Results and discussion 3.2 · Fig. 5b
CP durability at 10 mA cm-2	negligible potential variation for more than 60 h	—	—	Text Approximate	6 · Conclusions · Fig. 5c
CV cycling durability	LSV after 3000 CV cycles almost overlapped with initial curve	—	—	Text Qualitative	4 · Results and discussion 3.2 · Fig. 5a

Tafel analysis

Tafel and polarisation analysis

NiFeZn MOF nanosheets · Nanosheet

Tafel slopes from OER polarisation curves

Context: pristine MOF nanosheet catalyst/electrode ink unless otherwise noted
Measurement source: 4 · Results and discussion 3.2 · Fig. 4c

Property	Reported value	Normalised value	Uncertainty	Origin and quality	Source
Fe MOF Tafel slope	91.2 mV dec-1	—	—	Text Exact Reported	4 · Results and discussion 3.2 · Fig. 4c
Ni MOF Tafel slope	159.6 mV dec-1	—	—	Text Exact Reported	4 · Results and discussion 3.2 · Fig. 4c
NiFe MOF Tafel slope	78.7 mV dec-1	—	—	Text Exact Reported	4 · Results and discussion 3.2 · Fig. 4c
Tafel slopeMarked as a best value within this paper	37.8 mV dec-1	—	—	Text Exact Reported	4 · Results and discussion 3.2 · Fig. 4c