Electrochemistry Application — Copper-based conductive metal organic framework in-situ grown on copper foam as a bifunctional electrocatalyst

10 measurement groups · 27 results

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

ECSA-CV / double-layer capacitance slope

Voltammetry

Cu3HITP2/CF · Electrode

CV curves collected from 0.625-0.825 V vs RHE at 20-120 mV s-1 to compare electrochemical active surface area.

Temperature: room temperature
Geometry: Cu3HITP2/CF, Cu(OH)2/CF and powder Cu3HITP2 electrodes
Context: target versus precursor and powder controls
Measurement source: 1408 · 3.2 · Fig. S7-S9

Property	Reported value	Normalised value	Uncertainty	Origin and quality	Source
Cdl slope, Cu3HITP2/CFMarked as a best value within this paper	approximately 0.0078 mA cm-2 per (mV s-1) from Fig. S9	—	—	Visual Estimate Approximate	s4 · SI · Fig. S9
Cdl slope, Cu(OH)2/CF	approximately 0.0042 mA cm-2 per (mV s-1) from Fig. S9	—	—	Visual Estimate Approximate	s4 · SI · Fig. S9
Cdl slope, powder Cu3HITP2	approximately 0.0030 mA cm-2 per (mV s-1) from Fig. S9	—	—	Visual Estimate Approximate	s4 · SI · Fig. S9

electrochemical impedance spectroscopy

Impedance spectroscopy

Cu3HITP2/CF · Electrode

AC voltage amplitude 0 or 1.5 mV; frequency range 10^6 to 1 Hz; geometric-area normalisation.

Geometry: Cu3HITP2/CF and Cu(OH)2/CF electrodes
Context: target versus precursor control
Measurement source: 1406, 1409 · 2.3; 3.2 · Fig. S11

Property	Reported value	Normalised value	Uncertainty	Origin and quality	Source
approximate EIS semicircle width/Rct, Cu3HITP2Marked as a best value within this paper	approximately 65 ohm from Fig. S11	—	—	Visual Estimate Approximate	s5 · SI · Fig. S11
approximate EIS semicircle width/Rct, Cu(OH)2	approximately 85 ohm from Fig. S11	—	—	Visual Estimate Approximate	s5 · SI · Fig. S11

linear sweep voltammetry for OER

Voltammetry

Cu3HITP2/CF · Electrode

Three-electrode CHI 660E; 1.0 mol L-1 KOH; carbon rod counter; Ag/AgCl reference; converted to RHE; 20 CV pre-cycles; LSV 1 mV s-1; 1.2-1.8 V vs RHE; no iR compensation.

Temperature: room temperature
Geometry: 1 cm x 1 cm working electrodes normalised to geometric area
Context: target sample with copper foam, Cu(OH)2/CF, RuO2/CF and blank CF controls
Measurement source: 1406, 1408-1409 · 2.3; 3.2 · Fig. 5a

Property	Reported value	Normalised value	Uncertainty	Origin and quality	Source
OER overpotential at 10 mA cm-2, blank copper foam	478 mV at 10 mA cm-2	—	—	Text Exact Reported	1408 · 3.2 · Fig. 5a
OER overpotential at 10 mA cm-2, Cu3HITP2/CFMarked as a best value within this paper	300 mV at 10 mA cm-2	—	—	Text Exact Reported	1408 · 3.2 · Fig. 5a
OER overpotential at 10 mA cm-2, Cu(OH)2/CF	380 mV at 10 mA cm-2	—	—	Text Exact Reported	1408 · 3.2 · Fig. 5a
OER overpotential at 10 mA cm-2, powder Cu3HITP2	40 mV higher than Cu3HITP2/CF; approximately 340 mV	—	—	Calculated From Reported Approximate	1408 · 3.2 · Fig. S10
OER overpotential at 10 mA cm-2, RuO2/CF	320 mV at 10 mA cm-2	—	—	Text Exact Reported	1408 · 3.2 · Fig. 5a

RRDE Faraday efficiency and H2O2 yield during OER

Cu3HITP2/CF · Electrode

RRDE measurement for Cu3HITP2 during OER; potential range shown 1.2-1.8 V vs RHE.

Geometry: rotating ring-disk electrode
Context: target Cu3HITP2 catalyst
Measurement source: 1408-1409 · 3.2 · Fig. 5c

Property	Reported value	Normalised value	Uncertainty	Origin and quality	Source
OER Faraday efficiency	96.84%	—	—	Text Exact Reported	1408 · 3.2 · Fig. 5c
OER H2O2 by-product yield	1.57%	—	—	Text Exact Reported	1408 · 3.2 · Fig. 5c

chronoamperometry / i-t OER stability

Chronoamperometry

Cu3HITP2/CF · Electrode

24 h i-t test at constant E = 1.5 V vs RHE in 1.0 mol L-1 KOH; LSV before/after stability shown.

Geometry: Cu3HITP2/CF electrode
Context: target composite sample
Measurement source: 1408-1409 · 3.2 · Fig. 5d

Property	Reported value	Normalised value	Uncertainty	Origin and quality	Source
OER 24 h i-t current density	around 6 mA cm-2 over 24 h at E = 1.5 V vs RHE	—	—	Text Approximate	1408 · 3.2 · Fig. 5d

OER Tafel analysis

Tafel and polarisation analysis

Cu3HITP2/CF · Electrode

Tafel slopes calculated from eta = b log j + a for OER LSV data in 1.0 mol L-1 KOH.

Temperature: room temperature
Geometry: geometric-area normalised electrodes
Context: target and controls
Measurement source: 1406, 1408-1409 · 2.3; 3.2 · Fig. 5b

Property	Reported value	Normalised value	Uncertainty	Origin and quality	Source
OER Tafel slope, blank copper foam	196 mV dec-1	—	—	Text Exact Reported	1408 · 3.2 · Fig. 5b
OER Tafel slope, Cu3HITP2/CFMarked as a best value within this paper	95 mV dec-1	—	—	Text Exact Reported	1408 · 3.2 · Fig. 5b
OER Tafel slope, Cu(OH)2/CF	189 mV dec-1	—	—	Text Exact Reported	1408 · 3.2 · Fig. 5b
OER Tafel slope, RuO2/CF	112 mV dec-1	—	—	Text Exact Reported	1408 · 3.2 · Fig. 5b

linear sweep voltammetry for ORR

Voltammetry

Cu3HITP2/CF · Electrode

Three-electrode CHI 660E; 0.1 mol L-1 KOH; O2 bubbled for 20 min before LSV; 20 CV pre-cycles; LSV 1 mV s-1; ORR potential range 1.1-0.4 V vs RHE; no iR compensation.

Temperature: room temperature
Atmosphere: O2-saturated KOH for ORR; N2/O2 comparison for CV
Geometry: working electrodes include Cu3HITP2/CF, Cu(OH)2/CF, blank copper foam and Pt/C/CF
Context: target and controls
Measurement source: 1406, 1409-1410 · 2.3; 3.3 · Fig. 6a-b

Property	Reported value	Normalised value	Uncertainty	Origin and quality	Source
ORR half-wave potential E1/2, blank copper foam	0.60 V vs RHE	—	—	Text Exact Reported	1409 · 3.3 · Fig. 6a
ORR half-wave potential E1/2, Cu3HITP2/CF	0.75 V vs RHE	—	—	Text Exact Reported	1409 · 3.3 · Fig. 6a
ORR half-wave potential E1/2, Cu(OH)2/CF	0.69 V vs RHE	—	—	Text Exact Reported	1409 · 3.3 · Fig. 6a
ORR half-wave potential E1/2, powder Cu3HITP2	0.73 V vs RHE	—	—	Text Exact Reported	1409 · 3.3 · Fig. S12
ORR half-wave potential E1/2, commercial Pt/CMarked as a best value within this paper	0.83 V vs RHE	—	—	Text Exact Reported	1409 · 3.3 · Fig. 6a
ORR onset potential E0, Cu3HITP2/CF	0.87 V vs RHE	—	—	Text Exact Reported	1409 · 3.3 · Fig. 6a

RRDE electron-transfer number and H2O2 yield for ORR

ultrasonically removed Cu3HITP2 ink on glassy carbon · Electrode

Cu3HITP2 removed from copper foam, dispersed with Nafion/ethanol/water, dropped on glassy carbon; evaluated from 0.40-0.70 V vs RHE.

Atmosphere: O2-saturated 0.1 mol L-1 KOH
Geometry: glassy carbon disk in RRDE configuration
Context: delaminated Cu3HITP2 ink
Measurement source: 1409-1410 · 3.3 · Fig. 6c

Property	Reported value	Normalised value	Uncertainty	Origin and quality	Source
ORR H2O2 yield	5.70% from 0.40 to 0.70 V vs RHE	—	—	Text Exact Reported	1409 · 3.3 · Fig. 6c
ORR electron transfer number	n = 3.85 from 0.40 to 0.70 V vs RHE	—	—	Text Exact Reported	1409 · 3.3 · Fig. 6c

CV cycling stability followed by ORR LSV

Voltammetry

Cu3HITP2/CF · Electrode

ORR LSV compared before and after 2000 CV cycles in alkaline electrolyte.

Atmosphere: O2-saturated 0.1 mol L-1 KOH
Geometry: Cu3HITP2/CF electrode
Context: target composite sample
Measurement source: 1410 · 3.3 · Fig. 6d

Property	Reported value	Normalised value	Uncertainty	Origin and quality	Source
ORR E1/2 shift after 2000 cycles	10 mV negative shift	—	—	Text Exact Reported	1410 · 3.3 · Fig. 6d

powder Cu3HITP2 ORR rotating-electrode LSV and Tafel analysis

Voltammetry Tafel and polarisation analysis

powder/delaminated Cu3HITP2 · Powder

Powder Cu3HITP2 LSV at different rotation speeds; Tafel slope from Fig. S12b.

Atmosphere: ORR electrolyte
Geometry: powder catalyst electrode
Context: pristine framework comparison
Measurement source: s5 · SI · Fig. S12

Property	Reported value	Normalised value	Uncertainty	Origin and quality	Source
ORR Tafel slope, powder Cu3HITP2	-0.118 V dec-1	-118 mV dec-1	—	Text Exact Reported	1409 · 3.3 · Fig. S12b