Electrochemistry Application — Creating Dual Active Sites in Conductive Metal-Organic Frameworks for Efficient Water Splitting

Measurement evidence

Electrochemistry Application

Creating Dual Active Sites in Conductive Metal-Organic Frameworks for Efficient Water Splitting · He Y., Yan F., Zhang X. et al. · Advanced Energy Materials · 2023 · 2204177

12 measurement groups · 57 results

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

Gas collection and gas chromatography during water electrolysis

RuCo-CAT||RuCo-CAT two-electrode electrolyser · Electrode

Overall water splitting in 1.0 M KOH at 10 mA cm^-2; gas collected every 5 min.

Geometry: two-electrode electrolyser
Context: target_sample
Measurement source: article p.10 · Results and Discussion · Figure 6d; Figure S46 referenced

Property	Reported value	Normalised value	Uncertainty	Origin and quality	Source
Faradaic efficiency for overall water splittingMarked as a best value within this paper	about 99.1%	—	—	Text Approximate	article p.10 · Results and Discussion · Figure 6d
H2 to O2 volume ratio	1.9:1	—	—	Text Exact Reported	article p.10 · Results and Discussion · Figure 6d
H2 volume generated after 25 min	9.8 mL H2	—	—	Text Exact Reported	article p.10 · Results and Discussion · Figure 6d; Figure S46 referenced
O2 volume generated after 25 min	5.2 mL O2	—	—	Text Exact Reported	article p.10 · Results and Discussion · Figure 6d; Figure S46 referenced

Double-layer capacitance (Cdl) from CV curves

RuCo-CAT/CC nanorod arrays · Electrode

HER electrochemically active surface area proxy in alkaline media.

Geometry: three-electrode
Context: target_sample_vs_pristine_control
Measurement source: article p.5 · Results and Discussion · Figure 3d; Figure S19 referenced

Property	Reported value	Normalised value	Uncertainty	Origin and quality	Source
HER Cdl for Co-CAT/CC	31.6 mF cm^-2	—	—	Text Exact Reported	article p.5 · Results and Discussion · Figure 3d
HER Cdl for IrCo-CAT/CC	107.1 mF cm^-2	—	—	Text Exact Reported	article p.5 · Results and Discussion · Figure 3d
HER Cdl for RhCo-CAT/CC	123.4 mF cm^-2	—	—	Text Exact Reported	article p.5 · Results and Discussion · Figure 3d
HER Cdl for RuCo-CAT/CCMarked as a best value within this paper	181.1 mF cm^-2	—	—	Text Exact Reported	article p.5 · Results and Discussion · Figure 3d

Electrochemical impedance spectroscopy (EIS)

Impedance spectroscopy

RuCo-CAT/CC nanorod arrays · Electrode

Nyquist plots and equivalent circuits for HER kinetics.

Geometry: three-electrode
Context: target_sample_vs_pristine_control
Measurement source: article p.6 · Results and Discussion · Figure 3e

Property	Reported value	Normalised value	Uncertainty	Origin and quality	Source
HER charge transfer resistance for Co-CAT/CC	16.9 Ohm cm2	—	—	Text Exact Reported	article p.6 · Results and Discussion · Figure 3e
HER charge transfer resistance for IrCo-CAT/CC	6.8 Ohm cm2	—	—	Text Exact Reported	article p.6 · Results and Discussion · Figure 3e
HER charge transfer resistance for RhCo-CAT/CC	6.3 Ohm cm2	—	—	Text Exact Reported	article p.6 · Results and Discussion · Figure 3e
HER charge transfer resistance for RuCo-CAT/CCMarked as a best value within this paper	3.3 Ohm cm2	—	—	Text Exact Reported	article p.6 · Results and Discussion · Figure 3e

HER linear sweep voltammetry (LSV)

RuCo-CAT/CC nanorod arrays · Electrode

HER in N2-saturated 1.0 M KOH; electrolyte degassed by N2 at least 35 min; scan rate 5 mV s^-1; self-supported MOF working electrode, graphite rod counter electrode, Hg/HgO reference electrode.

Geometry: three-electrode; MOF/CC working electrode
Context: target_sample_vs_pristine_control_and_PtC
Measurement source: article pp.5-6 · Results and Discussion · Figure 3a-b

Property	Reported value	Normalised value	Uncertainty	Origin and quality	Source
HER overpotential at 100 mA cm^-2 for Co-CAT/CC	385 mV	—	—	Text Exact Reported	article p.5 · Results and Discussion · Figure 3b
HER overpotential at 100 mA cm^-2 for IrCo-CAT/CC	188 mV	—	—	Text Exact Reported	article p.5 · Results and Discussion · Figure 3b
HER overpotential at 100 mA cm^-2 for Pt/C/CC	192 mV	—	—	Text Exact Reported	article p.5 · Results and Discussion · Figure 3b
HER overpotential at 100 mA cm^-2 for RhCo-CAT/CC	182 mV	—	—	Text Exact Reported	article p.5 · Results and Discussion · Figure 3b
HER overpotential at 100 mA cm^-2 for RuCo-CAT/CCMarked as a best value within this paper	172 mV	—	—	Text Exact Reported	article p.5 · Results and Discussion · Figure 3b
HER overpotential at 10 mA cm^-2 for Co-CAT/CC	207 mV	—	—	Text Exact Reported	article p.5 · Results and Discussion · Figure 3a
HER overpotential at 10 mA cm^-2 for IrCo-CAT/CC	70 mV	—	—	Text Exact Reported	article p.5 · Results and Discussion · Figure 3a
HER overpotential at 10 mA cm^-2 for Pt/C/CC	46 mV	—	—	Text Exact Reported	article p.5 · Results and Discussion · Figure 3a
HER overpotential at 10 mA cm^-2 for RhCo-CAT/CC	49 mV	—	—	Text Exact Reported	article p.5 · Results and Discussion · Figure 3a
HER overpotential at 10 mA cm^-2 for RuCo-CAT/CCMarked as a best value within this paper	38 mV	—	—	Text Exact Reported	article p.5 · Results and Discussion · Figure 3a

CV cycling and chronopotentiometry

Voltammetry Galvanostatic cycling

RuCo-CAT/CC nanorod arrays · Electrode

HER stability after 1000 CV cycles and 15 h at 10 mA cm^-2.

Geometry: three-electrode
Context: target_samples
Measurement source: article p.6 · Results and Discussion · Figure 3f; Figures S22-S27 referenced

Property	Reported value	Normalised value	Uncertainty	Origin and quality	Source
HER current retention for RuCo-CAT/CC after 15 h at 10 mA cm^-2	97.8%	—	—	Text Exact Reported	article p.6 · Results and Discussion · Figure 3f

HER Tafel analysis

Tafel and polarisation analysis

RuCo-CAT/CC nanorod arrays · Electrode

Tafel slopes from HER LSV data in 1.0 M KOH.

Geometry: three-electrode
Context: target_sample_vs_pristine_control_and_PtC
Measurement source: article p.5 · Results and Discussion · Figure 3c

Property	Reported value	Normalised value	Uncertainty	Origin and quality	Source
HER Tafel slope for Co-CAT/CC	93.9 mV dec^-1	—	—	Text Exact Reported	article p.5 · Results and Discussion · Figure 3c
HER Tafel slope for IrCo-CAT/CC	34.1 mV dec^-1	—	—	Text Exact Reported	article p.5 · Results and Discussion · Figure 3c
HER Tafel slope for RhCo-CAT/CC	34.8 mV dec^-1	—	—	Text Exact Reported	article p.5 · Results and Discussion · Figure 3c
HER Tafel slope for RuCo-CAT/CCMarked as a best value within this paper	32.1 mV dec^-1	—	—	Text Exact Reported	article p.5 · Results and Discussion · Figure 3c

Double-layer capacitance (Cdl) from CV curves

RuCo-CAT/CC nanorod arrays · Electrode

OER electrochemically active surface area proxy in alkaline media.

Geometry: three-electrode
Context: target_sample_vs_pristine_control
Measurement source: article p.7 · Results and Discussion · Figure 4d

Property	Reported value	Normalised value	Uncertainty	Origin and quality	Source
OER Cdl for Co-CAT/CC	11.5 mF cm^-2	—	—	Text Exact Reported	article p.7 · Results and Discussion · Figure 4d
OER Cdl for IrCo-CAT/CC	53.7 mF cm^-2	—	—	Text Exact Reported	article p.7 · Results and Discussion · Figure 4d
OER Cdl for RhCo-CAT/CC	50.1 mF cm^-2	—	—	Text Exact Reported	article p.7 · Results and Discussion · Figure 4d
OER Cdl for RuCo-CAT/CCMarked as a best value within this paper	81.4 mF cm^-2	—	—	Text Exact Reported	article p.7 · Results and Discussion · Figure 4d

Electrochemical impedance spectroscopy (EIS)

Impedance spectroscopy

RuCo-CAT/CC nanorod arrays · Electrode

OER EIS at an overpotential of 250 mV.

Geometry: three-electrode
Context: target_sample_vs_pristine_control
Measurement source: article p.7 · Results and Discussion · Figure 4e

Property	Reported value	Normalised value	Uncertainty	Origin and quality	Source
OER charge transfer resistance for Co-CAT/CC	4.9 Ohm cm2	—	—	Text Exact Reported	article p.7 · Results and Discussion · Figure 4e
OER charge transfer resistance for IrCo-CAT/CC	3.2 Ohm cm2	—	—	Text Exact Reported	article p.7 · Results and Discussion · Figure 4e
OER charge transfer resistance for RhCo-CAT/CC	3.5 Ohm cm2	—	—	Text Exact Reported	article p.7 · Results and Discussion · Figure 4e
OER charge transfer resistance for RuCo-CAT/CCMarked as a best value within this paper	2.1 Ohm cm2	—	—	Text Exact Reported	article p.7 · Results and Discussion · Figure 4e

OER linear sweep voltammetry (LSV)

RuCo-CAT/CC nanorod arrays · Electrode

OER in 1.0 M KOH; commercial RuO2 benchmark under same conditions.

Geometry: three-electrode; MOF/CC working electrode
Context: target_sample_vs_pristine_control_and_RuO2
Measurement source: article pp.6-7 · Results and Discussion · Figure 4a-b

Property	Reported value	Normalised value	Uncertainty	Origin and quality	Source
OER overpotential at 100 mA cm^-2 for Co-CAT/CC	370 mV	—	—	Text Exact Reported	article p.7 · Results and Discussion · Figure 4a
OER overpotential at 100 mA cm^-2 for IrCo-CAT/CC	345 mV	—	—	Text Exact Reported	article p.7 · Results and Discussion · Figure 4a
OER overpotential at 100 mA cm^-2 for RhCo-CAT/CC	358 mV	—	—	Text Exact Reported	article p.7 · Results and Discussion · Figure 4a
OER overpotential at 100 mA cm^-2 for RuCo-CAT/CCMarked as a best value within this paper	338 mV	—	—	Text Exact Reported	article p.7 · Results and Discussion · Figure 4a
OER overpotential at 10 mA cm^-2 for RuCo-CAT/CCMarked as a best value within this paper	201 mV	—	—	SI Table Exact Reported	S30 · Table S5 · Table S5
OER overpotential at 50 mA cm^-2 for Co-CAT/CC	350 mV	—	—	Text Exact Reported	article p.7 · Results and Discussion · Figure 4a-b
OER overpotential at 50 mA cm^-2 for IrCo-CAT/CC	330 mV	—	—	Text Exact Reported	article p.7 · Results and Discussion · Figure 4b
OER overpotential at 50 mA cm^-2 for RhCo-CAT/CC	340 mV	—	—	Text Exact Reported	article p.7 · Results and Discussion · Figure 4b
OER overpotential at 50 mA cm^-2 for RuCo-CAT/CCMarked as a best value within this paper	315 mV	—	—	Text Exact Reported	article p.7 · Results and Discussion · Figure 4b
OER overpotential at 50 mA cm^-2 for RuO2/CC	500 mV	—	—	Text Exact Reported	article p.7 · Results and Discussion · Figure 4a-b

CV cycling and chronoamperometry

Voltammetry Chronoamperometry

RuCo-CAT/CC nanorod arrays · Electrode

OER stability after 1000 CV cycles and 15 h at 10 mA cm^-2.

Geometry: three-electrode
Context: target_samples
Measurement source: article pp.7-8 · Results and Discussion · Figure 4f; Figures S32-S37 referenced

Property	Reported value	Normalised value	Uncertainty	Origin and quality	Source
OER current retention for IrCo-CAT/CC after 15 h at 10 mA cm^-2	97.5%	—	—	Text Exact Reported	article p.8 · Results and Discussion · Figure 4f
OER current retention for RhCo-CAT/CC after 15 h at 10 mA cm^-2	98.1%	—	—	Text Exact Reported	article p.8 · Results and Discussion · Figure 4f
OER current retention for RuCo-CAT/CC after 15 h at 10 mA cm^-2Marked as a best value within this paper	98.5%	—	—	Text Exact Reported	article p.8 · Results and Discussion · Figure 4f

OER Tafel analysis

Tafel and polarisation analysis

RuCo-CAT/CC nanorod arrays · Electrode

Tafel slopes from OER LSV data in 1.0 M KOH.

Geometry: three-electrode
Context: target_sample_vs_pristine_control_and_RuO2
Measurement source: article p.7 · Results and Discussion · Figure 4c

Property	Reported value	Normalised value	Uncertainty	Origin and quality	Source
OER Tafel slope for Co-CAT/CC	82.7 mV dec^-1	—	—	Text Exact Reported	article p.7 · Results and Discussion · Figure 4c
OER Tafel slope for IrCo-CAT/CC	63.6 mV dec^-1	—	—	Text Exact Reported	article p.7 · Results and Discussion · Figure 4c
OER Tafel slope for RhCo-CAT/CC	61.2 mV dec^-1	—	—	Text Exact Reported	article p.7 · Results and Discussion · Figure 4c
OER Tafel slope for RuCo-CAT/CCMarked as a best value within this paper	45.7 mV dec^-1	—	—	Text Exact Reported	article p.7 · Results and Discussion · Figure 4c
OER Tafel slope for RuO2/CC	141.8 mV dec^-1	—	—	Text Exact Reported	article p.7 · Results and Discussion · Figure 4c

Two-electrode overall water electrolysis polarisation and chronopotentiometry

Galvanostatic cycling

RuCo-CAT||RuCo-CAT two-electrode electrolyser · Electrode

RuCo-CAT/CC used as both cathode and anode in 1.0 M KOH; compared with Pt/C||RuO2.

Geometry: two-electrode electrolyser
Context: target_sample_vs_benchmark
Measurement source: article p.10 · Results and Discussion · Figure 6a-c,e

Property	Reported value	Normalised value	Uncertainty	Origin and quality	Source
Overall water splitting cell voltage at 10 mA cm^-2 for RuCo-CAT\|\|RuCo-CATMarked as a best value within this paper	1.47 V	—	—	Text Exact Reported	article p.2 · Introduction · Figure 6e
Overall water splitting cell voltage at 50 mA cm^-2 for Pt/C\|\|RuO2	1.66 V	—	—	Text Exact Reported	article p.10 · Results and Discussion · Figure 6b
Overall water splitting cell voltage at 50 mA cm^-2 for RuCo-CAT\|\|RuCo-CATMarked as a best value within this paper	1.62 V	—	—	Text Exact Reported	article p.10 · Results and Discussion · Figure 6b
Overall water splitting current retention for RuCo-CAT\|\|RuCo-CAT	93.1% after 100 h at 10 mA cm^-2	—	—	Text Exact Reported	article p.10 · Results and Discussion · Figure 6c