Measurement evidence
Highly Selective CO2 Electroreduction to CH4 by In Situ Generated Cu2O Single-Type Sites on a Conductive MOF: Stabilizing Key Intermediates with Hydrogen Bonding · Yi J.-D., Xie R., Xie Z.-L. et al. · Angewandte Chemie - International Edition · 2020 · 23641-23648
Reported values remain attached to the sample, method, conditions, extraction quality and source location that produced them.
Cu2O@CuHHTP, -1.2 V 30 min · Electrode
0.1 M KCl/0.1 M KHCO3, CO2-saturated pH 6.8, CO2 flow 30 sccm, Nafion-117 membrane, Ag/AgCl reference, Pt foil counter, potentials vs RHE without IR compensation
| Property | Reported value | Normalised value | Uncertainty | Origin and quality | Source |
|---|
Cu2O@CCB electrode · Electrode
CO2RR under same conditions for Cu2O@CuHHTP, Cu2O@CCB and commercial Cu2O
| Property | Reported value | Normalised value | Uncertainty | Origin and quality | Source |
|---|---|---|---|---|---|
| CH4 FE for commercial Cu2O at -1.4 V | approximately 12% | — | — | Figure Axis Approximate | p004 / 23644 · Figure 3d |
| CH4 FE for Cu2O@CCB at -1.4 V | approximately 30% | — | — | Figure Axis Approximate | p004 / 23644 · Figure 3d |
| CH4 FE for Cu2O@CCB at -1.5 V | approximately 42% | — | — | Figure Axis Approximate | p004 / 23644 · Figure 3d |
Cu2O@CuHHTP, -1.2 V 30 min · Electrode
CO2-saturated 0.1 M KCl/0.1 M KHCO3; potentials vs RHE without IR compensation
| Property | Reported value | Normalised value | Uncertainty | Origin and quality | Source |
|---|---|---|---|---|---|
| Best CH4 Faradaic efficiency for Cu2O@CuHHTPMarked as a best value within this paper | 73% at -1.4 V vs RHE | — | — | Text Exact Reported | p005 / 23645 · Figure 3b; Table S1 |
| CH4 partial current density at -1.4 V vs RHEMarked as a best value within this paper | 10.8 mA cm^-2 at -1.4 V vs RHE | — | — | Text Exact Reported | p005 / 23645 · Figure 3c; Table S1 |
| CH4 FE for Cu2O@CuHHTP at -1.2 V | approximately 40% | — | — | Figure Axis Approximate | p004 / 23644 · Figure 3b |
| CH4 FE for Cu2O@CuHHTP at -1.3 V | approximately 55% | — | — | Figure Axis Approximate | p004 / 23644 · Figure 3b |
| CH4 FE for Cu2O@CuHHTP at -1.5 V | approximately 58% | — | — | Figure Axis Approximate | p004 / 23644 · Figure 3b |
| CH4 partial current density at -1.3 V | approximately 2.5 mA cm^-2 | — | — | Figure Axis Approximate | p004 / 23644 · Figure 3c |
| Detected gas products for Cu2O@CuHHTP | CH4, CO, C2H4, and H2; no liquid products by 1H NMR | — | — | Text Qualitative | p004-p005 / 23644-23645 · Figure 3b |
CuHHTP GCE electrode · Electrode
CO2-saturated 0.1 M KCl/0.1 M KHCO3; fresh catalysts for each potential
| Property | Reported value | Normalised value | Uncertainty | Origin and quality | Source |
|---|---|---|---|---|---|
| Dominant H2 FE for pristine CuHHTP | approximately 80-95% H2 depending on potential | — | — | Figure Axis Range | p010 / SI p9 · Figure S10 |
Commercial Cu2O/HHTP physical mixture electrode · Electrode
commercial Cu2O versus physical Cu2O/HHTP mixture
| Property | Reported value | Normalised value | Uncertainty | Origin and quality | Source |
|---|---|---|---|---|---|
| CH4 FE for commercial Cu2O at -1.4 V in Figure S14 | approximately 13% | — | — | Figure Axis Approximate | p012 / SI p11 · Figure S14 |
| CH4 FE for Cu2O/HHTP physical mixture at -1.4 V | approximately 29% | — | — | Figure Axis Approximate | p012 / SI p11 · Figure S14 |
Cata-1.2V-1h · Electrode
catalysts prepared at -1.2 V vs RHE for different reduction times
| Property | Reported value | Normalised value | Uncertainty | Origin and quality | Source |
|---|---|---|---|---|---|
| CH4 FE for 0.5 h electroreduction sample at -1.4 V | approximately 73% | — | — | Figure Axis Approximate | p016 / SI p15 · Figure S21 |
| CH4 FE for 1 h electroreduction sample at -1.4 V | approximately 62% | — | — | Figure Axis Approximate | p016 / SI p15 · Figure S21 |
| CH4 FE for 3 h electroreduction sample at -1.4 V | approximately 52% | — | — | Figure Axis Approximate | p016 / SI p15 · Figure S21 |
| CH4 FE for 5 h electroreduction sample at -1.4 V | approximately 38% | — | — | Figure Axis Approximate | p016 / SI p15 · Figure S21 |
Cu2O@CuHHTP, -1.2 V 30 min · Electrode
0.1 M KCl/0.1 M KHCO3 under Ar and CO2; CV -1.4 to 0.1 V vs RHE at 100 mV/s in SI; LSV scan rate 10 mV/s
| Property | Reported value | Normalised value | Uncertainty | Origin and quality | Source |
|---|---|---|---|---|---|
| CuHHTP Cu2+ to Cu+ reduction peak | about -0.93 V vs RHE | — | — | Text Approximate | p004 / 23644 · Figure 3a; Figure S9 |
Synthesized Cu2O quantum dots without conductive carbon black electrode · Electrode
CO2-saturated 0.1 M KHCO3/0.1 M KCl electrolyte
| Property | Reported value | Normalised value | Uncertainty | Origin and quality | Source |
|---|---|---|---|---|---|
| Current density of Cu2O@CuHHTP at -1.4 V in Figure S13 | approximately -15 mA cm^-2 | — | — | Figure Axis Approximate | p012 / SI p11 · Figure S13 |
| Current density of synthesized Cu2O QDs without carbon black at -1.4 V | approximately -9 mA cm^-2 | — | — | Figure Axis Approximate | p012 / SI p11 · Figure S13 |
Cu2O@CuHHTP, -1.2 V 30 min · Electrode
-1.4 V vs RHE for 5 h
| Property | Reported value | Normalised value | Uncertainty | Origin and quality | Source |
|---|---|---|---|---|---|
| Relative current after 5 h at -1.4 V | approximately 80% of initial | — | — | Figure Axis Approximate | p014 / SI p13 · Figure S17 |
| CH4 FE after 5 h at -1.4 V | approximately 50% | — | — | Figure Axis Approximate | p014 / SI p13 · Figure S17 |