Electrochemistry Application — Solid-State Electrochemical Carbon Dioxide Capture by Conductive Metal-Organic Framework Incorporating Nickel Bis(diimine) Units

6 measurement groups · 35 results

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

Second-order kinetic analysis of CO2 capture-time plots

Ni3(HITP)2 on carbon fibre paper eCC electrode · Electrode

Capture-time plots for Ni(DIB)2 and Ni3(HITP)2 under 100% CO2; fitted after initial material reduction period.

Temperature: 298
Atmosphere: 100% CO2
Geometry: Solid-state eCC chamber
Context: MOF electrode versus molecular analogue
Measurement source: S26-S27 · 10.4 Dynamic Analysis of the CO2 Capture Process · Figures S28-S29

Property	Reported value	Normalised value	Uncertainty	Origin and quality	Source
Ni3(HITP)2/Ni(DIB)2 CO2 capture rate-constant ratioMarked as a best value within this paper	1.11	—	—	Text Exact Reported	S27 · 10.4 Dynamic Analysis of the CO2 Capture Process · Figure S29
MOF capture rate constant increase over moleculeMarked as a best value within this paper	11% higher	—	—	Text Rounded Reported	33097 · Evaluation of the eCC Performance of the MOF Ni3(HITP)2 · Figure S29

Cyclic voltammetry

Voltammetry

Ni3(HITP)2 CV electrode on carbon fibre paper · Electrode

Ni3(HITP)2 ink on CFP; tetraethylammonium hexafluorophosphate in acetonitrile; scan rate 10 mV/s; N2 and CO2.

Temperature: 298
Atmosphere: N2 and CO2
Geometry: MOF-on-CFP working and counter electrodes, Ag/AgCl reference
Context: pristine MOF electrode
Measurement source: S13-S14 · 9.2 Cyclic Voltammogram Tests for Ni3(HITP)2 · Figure S13

Property	Reported value	Normalised value	Uncertainty	Origin and quality	Source
Ni3(HITP)2 redox E1/2 under N2	-0.51 V vs Ag/AgCl	—	—	Text Rounded Reported	33097 · Evaluation of the eCC Performance of the MOF Ni3(HITP)2 · Figure S13
Ni3(HITP)2 second redox E1/2 under N2	0.16 V vs Ag/AgCl	—	—	Text Rounded Reported	S14 · 9.2 Cyclic Voltammogram Tests for Ni3(HITP)2 · Figure S13
Ni3(HITP)2 third redox E1/2 under N2	0.55 V vs Ag/AgCl	—	—	Text Rounded Reported	S14 · 9.2 Cyclic Voltammogram Tests for Ni3(HITP)2 · Figure S13

Cyclic voltammetry

Voltammetry

Ni(DIB)2 solution electrochemical control · Unknown

2 mM Ni(DIB)2 in DMF with TBAPF6; three-electrode gastight cell; scan rate 100 mV/s; N2 and CO2.

Temperature: 298
Atmosphere: N2 and CO2
Geometry: Carbon cloth working electrode, Pt counter electrode, Ag/AgCl reference
Context: molecular analogue solution control
Measurement source: 33094-33095 · Evaluation of the eCC Performance of the Molecule Ni(DIB)2 · Figure 2a; Figure S12

Property	Reported value	Normalised value	Uncertainty	Origin and quality	Source
Ni(DIB)2 shifted second E1/2 under CO2	0.33 V vs Ag/AgCl	—	—	Text Rounded Reported	S13 · 9.1 Cyclic Voltammogram Tests for Ni(DIB)2 · Figure S12
Ni(DIB)2 shifted first E1/2 under CO2	-0.74 V vs Ag/AgCl	—	—	Text Rounded Reported	S13 · 9.1 Cyclic Voltammogram Tests for Ni(DIB)2 · Figure S12
Ni(DIB)2 second redox E1/2 under N2	0.20 V vs Ag/AgCl	—	—	Text Rounded Reported	33094 · Evaluation of the eCC Performance of the Molecule Ni(DIB)2 · Figure 2a
Ni(DIB)2 first redox E1/2 under N2	-0.84 V vs Ag/AgCl	—	—	Text Rounded Reported	33094 · Evaluation of the eCC Performance of the Molecule Ni(DIB)2 · Figure 2a

Solid-state cyclic electrochemical CO2 capture-release

Ni3(HITP)2 on carbon fibre paper eCC electrode · Electrode

Ni3(HITP)2 on CFP working electrode; PVFc/carbon black counter electrode; [Bmim][TF2N] electrolyte; -1.4 V capture and 1.1 V release across 1-100% CO2.

Temperature: 298
Atmosphere: 1%, 10%, 50%, 75% and 100% CO2 in N2/O2/humid air depending on test
Geometry: Sealed 50 mL PTFE chamber with pressure sensor
Context: pristine conductive MOF electrode without extra conductive additive
Measurement source: 33097 · Evaluation of the eCC Performance of the MOF Ni3(HITP)2 · Figures 3-4; Figures S19-S27

Property	Reported value	Normalised value	Uncertainty	Origin and quality	Source
Ni3(HITP)2 capacity utilisation at 100% CO2Marked as a best value within this paper	96%	—	—	Text Rounded Reported	33097 · Evaluation of the eCC Performance of the MOF Ni3(HITP)2 · Figure 3a,b
Ni3(HITP)2 capacity utilisation at 10% CO2	up to 60%	—	up to	Text Rounded Reported	33098 · eCC at Low CO2 Concentrations · Figure 4a,b
Ni3(HITP)2 capacity utilisation at 1% CO2	up to 35%	—	up to	Text Rounded Reported	33098 · eCC at Low CO2 Concentrations · Figure 4c,d
Ni3(HITP)2 capacity utilisation at 50% CO2	80% within 20 min	—	—	Text Rounded Reported	33097 · Evaluation of the eCC Performance of the MOF Ni3(HITP)2 · Figure 3b
Capacity utilisation for 50% CO2 in O2	88%	—	—	Text Rounded Reported	33097 · Evaluation of the eCC Performance of the MOF Ni3(HITP)2 · Figure S22
Ni3(HITP)2 capacity utilisation at 75% CO2	approximately 88% from Figure 3b	—	—	Figure Axis Approximate	33096 · Evaluation of the eCC Performance of the MOF Ni3(HITP)2 · Figure 3b
Capacity utilisation for 75% CO2 in O2	91%	—	—	Text Rounded Reported	33097 · Evaluation of the eCC Performance of the MOF Ni3(HITP)2 · Figure S22
Energy consumption at 100% CO2Marked as a best value within this paper	30.5 kJ mol-1 CO2	—	—	Text Exact Reported	33097 · Evaluation of the eCC Performance of the MOF Ni3(HITP)2 · Table S1; equation S5
Energy consumption at 10% CO2	48.3 kJ mol-1	—	—	Text Exact Reported	33098 · eCC at Low CO2 Concentrations · Figure 4
Energy consumption at 1% CO2	72.4 kJ mol-1	—	—	Text Exact Reported	33098 · eCC at Low CO2 Concentrations · Figure 4
Energy consumption at 50% CO2	36.1 kJ mol-1 CO2	—	—	Text Exact Reported	33097 · Evaluation of the eCC Performance of the MOF Ni3(HITP)2 · Table S1; equation S5
Energy consumption range for 1-100% CO2Marked as a best value within this paper	30.5-72.4 kJ mol-1	—	range	Text Range	33093 · Abstract
Ni3(HITP)2 Faraday efficiency at 100% CO2Marked as a best value within this paper	up to 98%	—	up to	Text Rounded Reported	33097 · Evaluation of the eCC Performance of the MOF Ni3(HITP)2 · Figure 3c
Ni3(HITP)2 Faraday efficiency at 10% CO2	58%	—	—	Text Rounded Reported	33098 · eCC at Low CO2 Concentrations · Figure 4a,b
Ni3(HITP)2 Faraday efficiency at 1% CO2	up to 35%	—	—	Text Rounded Reported	33100 · Conclusion
Capacity utilisation loss under humid air/water vapour	<1% for H2O	—	<	Text Approximate	33097 · Evaluation of the eCC Performance of the MOF Ni3(HITP)2 · Figures S23-S24
Capacity utilisation loss with NO2	<6% for NO2 at 1000 ppm	—	<	Text Approximate	33097 · Evaluation of the eCC Performance of the MOF Ni3(HITP)2 · Figure S24
Capacity utilisation loss with SO2	<8% for SO2 at 500 ppm	—	<	Text Approximate	33097 · Evaluation of the eCC Performance of the MOF Ni3(HITP)2 · Figure S24
Average capacity utilisation over 50 cyclesMarked as a best value within this paper	96%	—	—	Text Rounded Reported	33097 · Evaluation of the eCC Performance of the MOF Ni3(HITP)2 · Figure 3d
Lowest capacity utilisation over 50 cycles	above 88%	—	above	Text Approximate	33097 · Evaluation of the eCC Performance of the MOF Ni3(HITP)2 · Figure 3d

Solid-state cyclic electrochemical CO2 capture-release

Ni(DIB)2-carbon black composite electrode · Electrode

50 mL PTFE chamber in stainless shell; Ni(DIB)2/CB working electrode; PVFc/CB counter electrode; [Bmim][TF2N] electrolyte; -1.4 V capture, 1.1 V release.

Temperature: 298
Atmosphere: 100% CO2
Geometry: Sealed chamber pressure sensor with electrode pair separated by polyamide membrane
Context: molecular analogue composite electrode
Measurement source: 33096 · Evaluation of the eCC Performance of the Molecule Ni(DIB)2 · Figure 2d; Figure S16-S18

Property	Reported value	Normalised value	Uncertainty	Origin and quality	Source
Solid Ni(DIB)2-CB electrode capacity utilisation	60%	0.6 mol CO2 per mol Ni-BDI unit	—	Text Rounded Reported	33096 · Evaluation of the eCC Performance of the Molecule Ni(DIB)2 · Figure 2d

Solution CO2 uptake after electrochemical reduction

Ni(DIB)2 solution electrochemical control · Unknown

Reduced Ni(DIB)2 solution injected into sealed 20 mL vial continuously purged with 50% CO2 in N2 at 10 sccm; SprintIR CO2 sensor.

Temperature: 298
Atmosphere: 50% CO2 in N2
Geometry: H-cell reduction followed by gas-flow vial uptake measurement
Context: molecular analogue solution control
Measurement source: 33095 · Evaluation of the eCC Performance of the Molecule Ni(DIB)2 · Figure 2b,c; Figure S15

Property	Reported value	Normalised value	Uncertainty	Origin and quality	Source
CO2 absorbed by blank DMF control	1.25 mmol	—	—	Text Exact Reported	33095 · Evaluation of the eCC Performance of the Molecule Ni(DIB)2 · Figure 2b
Reduced Ni(DIB)2 solution capacity utilisation	61.5%	—	—	Text Exact Reported	33096 · Evaluation of the eCC Performance of the Molecule Ni(DIB)2 · Figure 2c
Net CO2 captured by reduced Ni(DIB)2 solution	ca. 0.62 mmol	—	ca.	Calculated From Reported Approximate	33096 · Evaluation of the eCC Performance of the Molecule Ni(DIB)2 · Figure 2c
CO2 absorbed by reduced Ni(DIB)2 solution	1.88 mmol	—	—	Text Exact Reported	33095 · Evaluation of the eCC Performance of the Molecule Ni(DIB)2 · Figure 2b
CO2 absorbed by unreduced Ni(DIB)2 solution	1.34 mmol	—	—	Text Exact Reported	33095 · Evaluation of the eCC Performance of the Molecule Ni(DIB)2 · Figure 2b