Measurement evidence
Ni(II)-Based Coordination Polymer with Pi-Conjugated Organic Linker as Catalyst for Oxygen Evolution Reaction Activity · Kumar T., Karmakar A., Halder A. et al. · Energy and Fuels · 2022 · 2722-2730
Reported values remain attached to the sample, method, conditions, extraction quality and source location that produced them.
CP 1 catalyst ink drop-cast on glassy carbon electrode · Electrode
CV at scan rates 20 to 100 mV s-1 in the non-Faradaic region; current density at 0.91 V vs RHE plotted versus scan rate.
| Property | Reported value | Normalised value | Uncertainty | Origin and quality | Source |
|---|---|---|---|---|---|
| double-layer capacitanceMarked as a best value within this paper | 216 uF cm-2 | — | — | Text Rounded Reported | 2726 · 3.1 Electrocatalytic Water Oxidation · Figure S4D |
CP 1 catalyst ink drop-cast on glassy carbon electrode · Electrode
Chronoamperometry at 1.76 V vs RHE for 6 h.
| Property | Reported value | Normalised value | Uncertainty | Origin and quality | Source |
|---|---|---|---|---|---|
| chronoamperometry applied potential | 1.76 V vs RHE | — | — | Text Exact Reported | 2726 · 3.1 Electrocatalytic Water Oxidation · Figure 5A |
| current retention after 6 hMarked as a best value within this paper | 96% of primary current density after 6 h | — | — | Text Rounded Reported | 2726 · 3.1 Electrocatalytic Water Oxidation · Figure 5A |
CP 1 catalyst ink drop-cast on glassy carbon electrode · Electrode
Nyquist plot in 0.1 M KOH for OER electrodes.
| Property | Reported value | Normalised value | Uncertainty | Origin and quality | Source |
|---|---|---|---|---|---|
| charge-transfer resistance comparisonMarked as a best value within this paper | lower Rct than CP 2 | — | — | Text Qualitative | 2726 · 3.1 Electrocatalytic Water Oxidation · Figure 4D |
| approximate Nyquist semicircle diameter | ~340 ohm from Figure 4D | — | visual estimate | Visual Estimate Uncertain | 2726 · Figure 4D · Figure 4D |
CP 1 catalyst ink drop-cast on glassy carbon electrode · Electrode
0.1 M KOH; three-electrode configuration; GCE working electrode; Ag/AgCl reference converted to RHE; Pt wire counter; scan rate 20 mV s-1; catalyst loading 0.20 mg cm-2.
| Property | Reported value | Normalised value | Uncertainty | Origin and quality | Source |
|---|---|---|---|---|---|
| OER overpotential at 10 mA cm-2Marked as a best value within this paper | 530 mV at 10 mA cm-2 | — | — | Text Rounded Reported | 2724 · 3.1 Electrocatalytic Water Oxidation · Figure 4A |
| OER overpotential at 1 mA cm-2Marked as a best value within this paper | 330 mV at 1 mA cm-2 | — | — | Text Rounded Reported | 2724 · 3.1 Electrocatalytic Water Oxidation · Figure 4A; Table S3 |
| Ni2+/Ni3+ redox peak potential | 1.48 V vs RHE | — | — | Text Rounded Reported | 2724 · 3.1 Electrocatalytic Water Oxidation · Figure 4B |
CP 1 catalyst ink drop-cast on glassy carbon electrode · Electrode
Tafel slope derived from OER polarisation data in 0.1 M KOH.
| Property | Reported value | Normalised value | Uncertainty | Origin and quality | Source |
|---|---|---|---|---|---|
| Tafel slope | 90 mV dec-1 | — | — | Text Rounded Reported | 2726 · 3.1 Electrocatalytic Water Oxidation · Figure 4C |
CP 2 catalyst ink drop-cast on glassy carbon electrode · Electrode
CV at scan rates 20 to 100 mV s-1 in the non-Faradaic region; current density at 0.91 V vs RHE plotted versus scan rate.
| Property | Reported value | Normalised value | Uncertainty | Origin and quality | Source |
|---|---|---|---|---|---|
| double-layer capacitance | 193 uF cm-2 | — | — | Text Rounded Reported | 2726 · 3.1 Electrocatalytic Water Oxidation · Figure S4D |
CP 2 catalyst ink drop-cast on glassy carbon electrode · Electrode
Chronoamperometry at 1.86 V vs RHE for 6 h.
| Property | Reported value | Normalised value | Uncertainty | Origin and quality | Source |
|---|---|---|---|---|---|
| chronoamperometry applied potential | 1.86 V vs RHE | — | — | Text Exact Reported | 2726 · 3.1 Electrocatalytic Water Oxidation · Figure S6A |
| current retention after 6 h | 63% of initial current density after 6 h | — | — | Text Rounded Reported | 2726 · 3.1 Electrocatalytic Water Oxidation · Figure S6A |
CP 2 catalyst ink drop-cast on glassy carbon electrode · Electrode
Nyquist plot in 0.1 M KOH for OER electrodes.
| Property | Reported value | Normalised value | Uncertainty | Origin and quality | Source |
|---|---|---|---|---|---|
| approximate Nyquist semicircle diameter | ~520 ohm from Figure 4D | — | visual estimate | Visual Estimate Uncertain | 2726 · Figure 4D · Figure 4D |
CP 2 catalyst ink drop-cast on glassy carbon electrode · Electrode
0.1 M KOH; three-electrode configuration; GCE working electrode; Ag/AgCl reference converted to RHE; Pt wire counter; scan rate 20 mV s-1; catalyst loading 0.20 mg cm-2.
| Property | Reported value | Normalised value | Uncertainty | Origin and quality | Source |
|---|---|---|---|---|---|
| OER overpotential at 10 mA cm-2 | 630 mV at 10 mA cm-2 | — | — | Text Rounded Reported | 2724 · 3.1 Electrocatalytic Water Oxidation · Figure 4A |
| OER overpotential at 1 mA cm-2 | 400 mV at 1 mA cm-2 | — | — | Text Rounded Reported | 2724 · 3.1 Electrocatalytic Water Oxidation · Figure 4A |
| Ni2+/Ni3+ redox peak potential | 1.43 V vs RHE | — | — | Text Rounded Reported | 2724 · 3.1 Electrocatalytic Water Oxidation · Figure 4B |
CP 2 catalyst ink drop-cast on glassy carbon electrode · Electrode
Tafel slope derived from OER polarisation data in 0.1 M KOH.
| Property | Reported value | Normalised value | Uncertainty | Origin and quality | Source |
|---|---|---|---|---|---|
| Tafel slope | 137 mV dec-1 | — | — | Figure Axis Rounded Reported | 2726 · Figure 4C · Figure 4C |
RuO2 benchmark electrode · Electrode
0.1 M KOH; comparison with CP 1 and CP 2 in Figure 4A.
| Property | Reported value | Normalised value | Uncertainty | Origin and quality | Source |
|---|---|---|---|---|---|
| Tafel slopeMarked as a best value within this paper | 78 mV dec-1 | — | — | Figure Axis Rounded Reported | 2726 · Figure 4C · Figure 4C |