Measurement evidence
Development of a UiO-Type Thin Film Electrocatalysis Platform with Redox-Active Linkers · Johnson B.A., Bhunia A., Fei H. et al. · Journal of the American Chemical Society · 2018 · 2985-2994
Reported values remain attached to the sample, method, conditions, extraction quality and source location that produced them.
Zr(dcphOH-NDI)@FTO thin film · Thin Film
Potential steps from 0 V to -1.26 V to -1.76 V, each 240 s, using 0.8 M KPF6/DMF; electroactive surface concentration determined from total charge.
| Property | Reported value | Normalised value | Uncertainty | Origin and quality | Source |
|---|---|---|---|---|---|
| Electroactive NDI surface coverage in filmMarked as a best value within this paper | 3.1 x 10^-7 mol cm^-2 | — | — | Text Exact Reported | main p.5 · Electrochemical and Optical Properties · Figure S12 |
Zr(dcphOH-NDI)@FTO thin film · Thin Film
Zr(dcphOH-NDI)@FTO in H2O with 0.8 M KCl(aq), pH 6.48-6.5; potentials vs NHE; scan-rate-dependent CVs from 5 to 100 mV/s.
| Property | Reported value | Normalised value | Uncertainty | Origin and quality | Source |
|---|---|---|---|---|---|
| Aqueous single reduction wave potentialMarked as a best value within this paper | -0.24 V vs NHE (-0.90 V vs Fc+/0) | — | — | Text Exact Reported | main p.7 · Electrochemical and Optical Properties · Figure S18a |
| Aqueous scan-rate dependence | Peak current density varies linearly with v^1/2 | — | — | Caption Qualitative | SI p.S11 · Figure captions · Figure S19 |
Zr(dcphOH-NDI)@FTO thin film · Thin Film
Zr(dcphOH-NDI)@FTO working electrode in 5 mL DMF with 0.8 M KPF6; 50 mV/s for Table 1, scan-rate studies 5-100 mV/s; nonaqueous Ag/AgNO3 reference vs Fc+/0.
| Property | Reported value | Normalised value | Uncertainty | Origin and quality | Source |
|---|---|---|---|---|---|
| First reduction peak separation | 166 mV | — | — | Table Exact Reported | main p.5 · Electrochemical and Optical Properties · Table 1 |
| Second reduction peak separation | 175 mV | — | — | Table Exact Reported | main p.5 · Electrochemical and Optical Properties · Table 1 |
| First reduction half-wave potentialMarked as a best value within this paper | -0.96 V vs Fc+/0 | — | — | Table Exact Reported | main p.5 · Electrochemical and Optical Properties · Table 1 |
| Second reduction half-wave potentialMarked as a best value within this paper | -1.36 V vs Fc+/0 | — | — | Table Exact Reported | main p.5 · Electrochemical and Optical Properties · Table 1 |
| Film absorption maximum 1 | 364 nm | — | — | Table Exact Reported | main p.5 · Electrochemical and Optical Properties · Table 1 |
| Film absorption maximum 2 | 382 nm | — | — | Table Exact Reported | main p.5 · Electrochemical and Optical Properties · Table 1 |
| Scan-rate dependence in DMF | Peak current density linearly proportional to scan-rate square root | — | — | Caption Qualitative | main p.6 · Electrochemical and Optical Properties · Figure 7 |
Zr(dcphOH-NDI)@FTO thin film · Thin Film
0.8 M KCl(aq), pH 6.48; potential step from 0.21 V to -0.89 V vs NHE; spectroelectrochemical monitoring at 491 nm and chronocoulometry; post-measurement KOH digestion for total NDI.
| Property | Reported value | Normalised value | Uncertainty | Origin and quality | Source |
|---|---|---|---|---|---|
| Aqueous electroactive surface concentrationMarked as a best value within this paper | (1.2 +/- 0.5) x 10^-7 mol cm^-2 | — | +/- 0.5 x 10^-7 mol cm^-2 | Calculated From Reported Exact Reported | SI p.S15 · Percentage of redox-active linkers · Figure S20 |
| Example charge passed in aqueous step | 0.055 C | — | — | Calculated From Reported Exact Reported | SI p.S14 · Percentage of redox-active linkers |
| Aqueous calculated electron countMarked as a best value within this paper | 1.7 +/- 0.2 | — | +/- 0.2 | Calculated From Reported Exact Reported | SI p.S15 · Percentage of redox-active linkers |
| Redox-active NDI fraction in waterMarked as a best value within this paper | 87 +/- 8% | 0.87 fraction | +/- 8% | Calculated From Reported Exact Reported | SI p.S15 · Percentage of redox-active linkers |
| Example total NDI surface concentration after digestion | 2.3 x 10^-7 mol cm^-2 | — | — | Calculated From Reported Exact Reported | SI p.S14 · Percentage of redox-active linkers · Figure S21 |
| Equivalent diffusion coefficient in aqueous KClMarked as a best value within this paper | 2.1 x 10^-10 cm2 s^-1 | — | — | Text Exact Reported | main p.7 · Electrochemical and Optical Properties · Figure S20 |
dcphOH-NDI solution control · Model
1 mM dcphOH-NDI in DMF at glassy carbon disk with 0.1 M n-Bu4NPF6 for Figure S10; Table 1 comparison in 0.8 M KPF6 at 50 mV/s.
| Property | Reported value | Normalised value | Uncertainty | Origin and quality | Source |
|---|---|---|---|---|---|
| Free-linker first reduction potential | -0.93 V vs Fc+/0 | — | — | Table Exact Reported | main p.5 · Electrochemical and Optical Properties · Table 1 |
| Free-linker second reduction potential | -1.30 V vs Fc+/0 | — | — | Table Exact Reported | main p.5 · Electrochemical and Optical Properties · Table 1 |
SAM@FTO · Electrode
SAM@FTO in DMF with 0.8 M KPF6 at 0.05 V/s; integrated wave used to calculate adsorbed NDI monolayer surface concentration.
| Property | Reported value | Normalised value | Uncertainty | Origin and quality | Source |
|---|---|---|---|---|---|
| SAM NDI surface concentration | 7.9 x 10^-11 mol cm^-2 | — | — | Caption Exact Reported | SI p.S8 · Figure captions · Figure S13 |