Electrochemistry Application — Facile synthesis of Ni-, Co-, Cu-metal organic frameworks electrocatalyst boosting for hydrogen evolution reaction

25 measurement groups · 40 results

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

Cyclic voltammetry Cdl/ECSA estimation

Voltammetry

Co-BTC/CFP HER electrode · Electrode

CV in non-Faradaic 0 to -0.10 V vs RHE window at 10-50 mV s-1; Delta J at -0.05 V vs RHE plotted versus scan rate, slope is twice Cdl.

Geometry: MOF/CFP working electrode.
Context: MOF/CFP composite electrode
Measurement source: main p.5, article p.176 · Results and discussion · Fig. 5d

Property	Reported value	Normalised value	Uncertainty	Origin and quality	Source
Double-layer capacitance Cdl	1.11 mF cm-2	—	—	Text Exact Reported	main p.5, article p.176 · Results and discussion · Fig. 5d
Electrochemical active surface area	27.7 cm2	—	—	Text Exact Reported	main p.5, article p.176 · Results and discussion · Fig. 5d

Cyclic voltammetry Cdl/ECSA estimation

Voltammetry

Cu-BTC/CFP HER electrode · Electrode

CV in non-Faradaic 0 to -0.10 V vs RHE window at 10-50 mV s-1; Delta J at -0.05 V vs RHE plotted versus scan rate, slope is twice Cdl.

Geometry: MOF/CFP working electrode.
Context: MOF/CFP composite electrode
Measurement source: SI text p.2 · Computational formula of the electrochemical active surface area · Fig. 5d

Property	Reported value	Normalised value	Uncertainty	Origin and quality	Source
Double-layer capacitance Cdl	0.90 mF cm-2	—	—	Text Exact Reported	main p.5, article p.176 · Results and discussion · Fig. 5d
Electrochemical active surface area	22.5 cm2	—	—	Text Exact Reported	main p.5, article p.176 · Results and discussion · Fig. 5d

Cyclic voltammetry Cdl/ECSA estimation

Voltammetry

Ni-BTC/CFP HER electrode · Electrode

CV in non-Faradaic 0 to -0.10 V vs RHE window at 10-50 mV s-1; Delta J at -0.05 V vs RHE plotted versus scan rate, slope is twice Cdl.

Geometry: MOF/CFP working electrode.
Context: MOF/CFP composite electrode
Measurement source: main p.5, article p.176 · Results and discussion · Fig. 5d

Property	Reported value	Normalised value	Uncertainty	Origin and quality	Source
Double-layer capacitance CdlMarked as a best value within this paper	1.42 mF cm-2	—	—	Text Exact Reported	main p.5, article p.176 · Results and discussion · Fig. 5d
Electrochemical active surface areaMarked as a best value within this paper	35.5 cm2	—	—	Text Exact Reported	main p.5, article p.176 · Results and discussion · Fig. 5d

Electrochemical impedance spectroscopy / Nyquist plot

Impedance spectroscopy

Co-BTC/CFP HER electrode · Electrode

EIS used to compare charge-transfer resistance in HER electrolyte.

Geometry: MOF/CFP working electrode.
Context: MOF/CFP composite electrode
Measurement source: main p.5, article p.176 · Results and discussion · Fig. 5c

Property	Reported value	Normalised value	Uncertainty	Origin and quality	Source
Charge-transfer resistance Rct	1.9 Ohm	—	—	Text Exact Reported	main p.5, article p.176 · Results and discussion · Fig. 5c

Electrochemical impedance spectroscopy / Nyquist plot

Impedance spectroscopy

Cu-BTC/CFP HER electrode · Electrode

EIS used to compare charge-transfer resistance in HER electrolyte.

Geometry: MOF/CFP working electrode.
Context: MOF/CFP composite electrode
Measurement source: main p.5, article p.176 · Results and discussion · Fig. 5c

Property	Reported value	Normalised value	Uncertainty	Origin and quality	Source
Charge-transfer resistance Rct	8.2 Ohm	—	—	Text Exact Reported	main p.5, article p.176 · Results and discussion · Fig. 5c

Electrochemical impedance spectroscopy / Nyquist plot

Impedance spectroscopy

Ni-BTC/CFP HER electrode · Electrode

EIS used to compare charge-transfer resistance in HER electrolyte.

Geometry: MOF/CFP working electrode.
Context: MOF/CFP composite electrode
Measurement source: main p.5, article p.176 · Results and discussion · Fig. 5c

Property	Reported value	Normalised value	Uncertainty	Origin and quality	Source
Charge-transfer resistance RctMarked as a best value within this paper	0.9 Ohm	—	—	Text Exact Reported	main p.5, article p.176 · Results and discussion · Fig. 5c

HER linear sweep voltammetry

Voltammetry

Co-BTC/CFP HER electrode · Electrode

0.5 M H2SO4, pH 0.38, 20 mL electrolyte, 5.0 mV s-1 scan rate, Ag/AgCl (3.0 M KCl) reference, Pt paper counter electrode unless otherwise noted.

Geometry: 1.0 cm2 CFP working electrode, ca. 1 mg cm-2 loading.
Context: MOF/CFP composite electrode
Measurement source: main p.4, article p.175 · Results and discussion · Fig. 5a

Property	Reported value	Normalised value	Uncertainty	Origin and quality	Source
HER overpotential at 10 mA cm-2	123 mV	—	—	Text Exact Reported	main p.4, article p.175 · Results and discussion · Fig. 5a
HER overpotential at 20 mA cm-2	171 mV	—	—	Text Exact Reported	main p.4, article p.175 · Results and discussion · Fig. 5a

HER linear sweep voltammetry

Voltammetry

Cu-BTC/CFP HER electrode · Electrode

0.5 M H2SO4, pH 0.38, 20 mL electrolyte, 5.0 mV s-1 scan rate, Ag/AgCl (3.0 M KCl) reference, Pt paper counter electrode unless otherwise noted.

Geometry: 1.0 cm2 CFP working electrode, ca. 1 mg cm-2 loading.
Context: MOF/CFP composite electrode
Measurement source: main p.3, article p.174 · Electrocatalytic hydrogen evolution reaction · Fig. 5a

Property	Reported value	Normalised value	Uncertainty	Origin and quality	Source
HER overpotential at 10 mA cm-2	270 mV	—	—	Text Exact Reported	main p.4, article p.175 · Results and discussion · Fig. 5a
HER overpotential at 20 mA cm-2	340 mV	—	—	Text Exact Reported	main p.4, article p.175 · Results and discussion · Fig. 5a

HER linear sweep voltammetry

Voltammetry

Ni-BTC/CFP HER electrode · Electrode

0.5 M H2SO4, pH 0.38, 20 mL electrolyte, 5.0 mV s-1 scan rate, Ag/AgCl (3.0 M KCl) reference, Pt paper counter electrode unless otherwise noted.

Geometry: 1.0 cm2 CFP working electrode, ca. 1 mg cm-2 loading.
Context: MOF/CFP composite electrode
Measurement source: main p.4, article p.175 · Results and discussion · Fig. 5a

Property	Reported value	Normalised value	Uncertainty	Origin and quality	Source
HER overpotential at 10 mA cm-2Marked as a best value within this paper	53 mV	—	—	Text Exact Reported	main p.4, article p.175 · Results and discussion · Fig. 5a
HER overpotential at 20 mA cm-2Marked as a best value within this paper	90 mV	—	—	Text Exact Reported	main p.4, article p.175 · Results and discussion · Fig. 5a

Tafel analysis from HER polarisation curves

Tafel and polarisation analysis

Co-BTC/CFP HER electrode · Electrode

Tafel slopes obtained from HER polarisation curves in 0.5 M H2SO4.

Geometry: MOF/CFP working electrode.
Context: MOF/CFP composite electrode
Measurement source: main p.5, article p.176 · Results and discussion · Fig. 5b

Property	Reported value	Normalised value	Uncertainty	Origin and quality	Source
HER Tafel slope	100 mV dec-1	—	—	Text Exact Reported	main p.5, article p.176 · Results and discussion · Fig. 5b

Tafel analysis from HER polarisation curves

Tafel and polarisation analysis

Cu-BTC/CFP HER electrode · Electrode

Tafel slopes obtained from HER polarisation curves in 0.5 M H2SO4.

Geometry: MOF/CFP working electrode.
Context: MOF/CFP composite electrode
Measurement source: main p.5, article p.176 · Results and discussion · Fig. 5b

Property	Reported value	Normalised value	Uncertainty	Origin and quality	Source
HER Tafel slope	155 mV dec-1	—	—	Text Exact Reported	main p.5, article p.176 · Results and discussion · Fig. 5b

Tafel analysis from HER polarisation curves using graphitic rod counter electrode

Tafel and polarisation analysis

Co-BTC/CFP HER electrode · Electrode

Supplementary Fig. S4; 0.5 M H2SO4 HER, graphitic rod as counter electrode at 10 mV s-1, compared with Pt-paper CE trend.

Geometry: MOF/CFP working electrode; graphitic rod counter electrode.
Context: MOF/CFP composite electrode
Measurement source: SI rendered p.7 (S7) · Figure captions and Fig. S4 · Fig. S4b

Property	Reported value	Normalised value	Uncertainty	Origin and quality	Source
HER Tafel slope with graphitic rod counter electrode	119 mV dec-1	—	—	Visual Estimate Rounded Reported	SI rendered p.7 (S7) · Fig. S4 · Fig. S4b

Tafel analysis from HER polarisation curves using graphitic rod counter electrode

Tafel and polarisation analysis

Cu-BTC/CFP HER electrode · Electrode

Supplementary Fig. S4; 0.5 M H2SO4 HER, graphitic rod as counter electrode at 10 mV s-1, compared with Pt-paper CE trend.

Geometry: MOF/CFP working electrode; graphitic rod counter electrode.
Context: MOF/CFP composite electrode
Measurement source: SI rendered p.7 (S7) · Figure captions and Fig. S4 · Fig. S4b

Property	Reported value	Normalised value	Uncertainty	Origin and quality	Source
HER Tafel slope with graphitic rod counter electrode	151 mV dec-1	—	—	Visual Estimate Rounded Reported	SI rendered p.7 (S7) · Fig. S4 · Fig. S4b

Tafel analysis from HER polarisation curves using graphitic rod counter electrode

Tafel and polarisation analysis

Ni-BTC/CFP HER electrode · Electrode

Supplementary Fig. S4; 0.5 M H2SO4 HER, graphitic rod as counter electrode at 10 mV s-1, compared with Pt-paper CE trend.

Geometry: MOF/CFP working electrode; graphitic rod counter electrode.
Context: MOF/CFP composite electrode
Measurement source: SI rendered p.7 (S7) · Figure captions and Fig. S4 · Fig. S4b

Property	Reported value	Normalised value	Uncertainty	Origin and quality	Source
HER Tafel slope with graphitic rod counter electrodeMarked as a best value within this paper	70 mV dec-1	—	—	Visual Estimate Rounded Reported	SI rendered p.7 (S7) · Fig. S4 · Fig. S4b

Tafel analysis from HER polarisation curves

Tafel and polarisation analysis

Ni-BTC/CFP HER electrode · Electrode

Tafel slopes obtained from HER polarisation curves in 0.5 M H2SO4.

Geometry: MOF/CFP working electrode.
Context: MOF/CFP composite electrode
Measurement source: main p.5, article p.176 · Results and discussion · Fig. 5b

Property	Reported value	Normalised value	Uncertainty	Origin and quality	Source
HER Tafel slopeMarked as a best value within this paper	62 mV dec-1	—	—	Text Exact Reported	main p.5, article p.176 · Results and discussion · Fig. 5b

Tafel analysis from HER polarisation curves

Tafel and polarisation analysis

Commercial 20 wt% Pt/C HER benchmark electrode · Electrode

Commercial 20 wt% Pt/C benchmark in 0.5 M H2SO4.

Geometry: Not specified.
Context: non-MOF benchmark electrode
Measurement source: main p.5, article p.176 · Results and discussion · Fig. 5b

Property	Reported value	Normalised value	Uncertainty	Origin and quality	Source
HER Tafel slopeMarked as a best value within this paper	58 mV dec-1	—	—	Text Exact Reported	main p.5, article p.176 · Results and discussion · Fig. 5b

HER mass activity calculation

Co-BTC/CFP HER electrode · Electrode

Mass activity calculated by dividing HER current density by catalyst mass loading.

Geometry: MOF/CFP working electrode.
Context: MOF/CFP composite electrode
Measurement source: main p.6, article p.177 · Results and discussion · Fig. 6a

Property	Reported value	Normalised value	Uncertainty	Origin and quality	Source
Current density per ECSA at 100 mV overpotential	0.25 mA g m-2	—	—	Text Exact Reported	main p.6, article p.177 · Results and discussion · Fig. 6b
HER mass activity at 130 mV overpotential	11.7 mA mg-1	—	—	Text Exact Reported	main p.6, article p.177 · Results and discussion · Fig. 6a

HER mass activity calculation

Cu-BTC/CFP HER electrode · Electrode

Mass activity calculated by dividing HER current density by catalyst mass loading.

Geometry: MOF/CFP working electrode.
Context: MOF/CFP composite electrode
Measurement source: main p.6, article p.177 · Results and discussion · Fig. 6a

Property	Reported value	Normalised value	Uncertainty	Origin and quality	Source
Current density per ECSA at 100 mV overpotential	0.065 mA g m-2	—	—	Text Exact Reported	main p.6, article p.177 · Results and discussion · Fig. 6b
HER mass activity at 130 mV overpotential	2.1 mA mg-1	—	—	Text Exact Reported	main p.6, article p.177 · Results and discussion · Fig. 6a

HER mass activity calculation

Ni-BTC/CFP HER electrode · Electrode

Mass activity calculated by dividing HER current density by catalyst mass loading.

Geometry: MOF/CFP working electrode.
Context: MOF/CFP composite electrode
Measurement source: main p.6, article p.177 · Results and discussion · Fig. 6a

Property	Reported value	Normalised value	Uncertainty	Origin and quality	Source
Current density per ECSA at 100 mV overpotentialMarked as a best value within this paper	0.62 mA g m-2	—	—	Text Exact Reported	main p.6, article p.177 · Results and discussion · Fig. 6b
HER mass activity at 130 mV overpotentialMarked as a best value within this paper	34.8 mA mg-1	—	—	Text Exact Reported	main p.6, article p.177 · Results and discussion · Fig. 6a

Durability: cycling and chronoamperometry

Chronoamperometry

Co-BTC/CFP HER electrode · Electrode

LSV before/after 10,000 cycles and staged 6 h chronoamperometry in 0.5 M H2SO4.

Geometry: MOF/CFP working electrode.
Context: MOF/CFP composite electrode
Measurement source: main p.6, article p.177 · Results and discussion · Fig. 6c; Fig. S6

Property	Reported value	Normalised value	Uncertainty	Origin and quality	Source
HER performance retention after 10,000 cycles at -0.2 V_RHE	72 % retention	—	—	Text Exact Reported	main p.6, article p.177 · Results and discussion · Fig. 6c
Staged chronoamperometry applied potentials	-0.17, -0.21 and -0.27 V_RHE for 6 h stages	—	set of values	Caption Exact Reported	SI rendered p.8-S10 · Figure captions · Fig. S6

Durability: cycling and chronoamperometry

Chronoamperometry

Cu-BTC/CFP HER electrode · Electrode

LSV before/after 10,000 cycles and staged 6 h chronoamperometry in 0.5 M H2SO4.

Geometry: MOF/CFP working electrode.
Context: MOF/CFP composite electrode
Measurement source: main p.6, article p.177 · Results and discussion · Fig. 6c; Fig. S5

Property	Reported value	Normalised value	Uncertainty	Origin and quality	Source
HER performance retention after 10,000 cycles at -0.2 V_RHE	60 % retention	—	—	Text Exact Reported	main p.6, article p.177 · Results and discussion · Fig. 6c
Staged chronoamperometry high-potential current decrease	over 50 % after high potential	—	>	Text Approximate	main p.6, article p.177 · Results and discussion · Figs. S5-S6
Staged chronoamperometry low-stage current decrease	significantly decreased by 20 %	—	—	Text Exact Reported	main p.6, article p.177 · Results and discussion · Figs. S5-S6
Staged chronoamperometry applied potentials	-0.34, -0.38 and -0.43 V_RHE for 6 h stages	—	set of values	Caption Exact Reported	SI rendered p.8-S10 · Figure captions · Fig. S5

Durability: cycling and chronoamperometry

Chronoamperometry

Ni-BTC/CFP HER electrode · Electrode

LSV before/after 10,000 cycles and chronoamperometry for 12 h at -0.25 V_RHE in 0.5 M H2SO4; staged SI tests used 6 h at multiple potentials.

Geometry: MOF/CFP working electrode.
Context: MOF/CFP composite electrode
Measurement source: main p.6, article p.177 · Results and discussion · Fig. 6c,d; Fig. S7

Property	Reported value	Normalised value	Uncertainty	Origin and quality	Source
Chronoamperometry current-density change over 12 hMarked as a best value within this paper	< 2 mA cm-2 over 12 h	—	<	Text Approximate	main p.6, article p.177 · Results and discussion · Fig. 6d
Staged chronoamperometry performance retentionMarked as a best value within this paper	more than 98 % performance under every stage	—	>	Text Approximate	main p.6, article p.177 · Results and discussion · Fig. S7
Staged chronoamperometry applied potentials	-0.09, -0.12 and -0.18 V_RHE for 6 h stages	—	set of values	Caption Exact Reported	SI rendered p.8-S10 · Figure captions · Fig. S7

Turnover frequency calculation

Co-BTC/CFP HER electrode · Electrode

TOF calculated using TOF = jA/2nF, assuming Cu, Co and Ni ions are evenly separated and catalytically active.

Geometry: MOF/CFP working electrode.
Context: MOF/CFP composite electrode
Measurement source: main p.7, article p.178 · Results and discussion · Fig. 7

Property	Reported value	Normalised value	Uncertainty	Origin and quality	Source
TOF at 120 mV overpotential	0.016 s-1	—	—	Text Exact Reported	main p.7, article p.178 · Results and discussion · Fig. 7

Turnover frequency calculation

Cu-BTC/CFP HER electrode · Electrode

TOF calculated using TOF = jA/2nF, assuming Cu, Co and Ni ions are evenly separated and catalytically active.

Geometry: MOF/CFP working electrode.
Context: MOF/CFP composite electrode
Measurement source: main p.7, article p.178 · Results and discussion · Fig. 7

Property	Reported value	Normalised value	Uncertainty	Origin and quality	Source
TOF at 120 mV overpotential	0.002 s-1	—	—	Text Exact Reported	main p.7, article p.178 · Results and discussion · Fig. 7

Turnover frequency calculation

Ni-BTC/CFP HER electrode · Electrode

TOF calculated using TOF = jA/2nF, assuming Cu, Co and Ni ions are evenly separated and catalytically active.

Geometry: MOF/CFP working electrode.
Context: MOF/CFP composite electrode
Measurement source: main p.7, article p.178 · Results and discussion · Fig. 7

Property	Reported value	Normalised value	Uncertainty	Origin and quality	Source
TOF at 120 mV overpotentialMarked as a best value within this paper	0.041 s-1	—	—	Text Exact Reported	main p.7, article p.178 · Results and discussion · Fig. 7