Measurement evidence
Efficient hydrogen production from MIL-53(Fe) catalyst-modified Mo: BiVO4 photoelectrodes · Zhang B., Dong G., Wang L. et al. · Catalysis Science and Technology · 2017 · 4971-4976
Reported values remain attached to the sample, method, conditions, extraction quality and source location that produced them.
FMBV-2 / 2% Mo:BiVO4-MIL-53(Fe) · Electrode
0.6 V vs RHE, 10 mV AC amplitude, 10^-2 to 10^5 Hz, fitted with ZView.
| Property | Reported value | Normalised value | Uncertainty | Origin and quality | Source |
|---|---|---|---|---|---|
| FMBV-2 EIS semicircle arcMarked as a best value within this paper | much smaller semicircle arc at high frequency | — | — | Text Qualitative | 5 · Results and discussion · Fig. 4C |
nanoporous BiVO4 photoanode · Electrode
Three-electrode cell; 0.2 M Na2SO4 saturated with N2 for 30 min; AM 1.5G; 1.23 V vs RHE; Pt counter electrode; H2 quantified by GC using Fig. S12 calibration.
| Property | Reported value | Normalised value | Uncertainty | Origin and quality | Source |
|---|---|---|---|---|---|
| BiVO4 H2 evolution amount | 0.35 umol | 0.35 umol | — | Text Exact Reported | 5 · Results and discussion · Fig. 4D |
2% Mo:BiVO4/FeOOH-2 · Electrode
Three-electrode cell; 0.2 M Na2SO4 saturated with N2 for 30 min; AM 1.5G; 1.23 V vs RHE; Pt counter electrode.
| Property | Reported value | Normalised value | Uncertainty | Origin and quality | Source |
|---|---|---|---|---|---|
| 2% Mo:BiVO4/FeOOH-2 H2 evolution amount | 17.07 umol | 17.07 umol | — | Text Exact Reported | 5 · Results and discussion · Fig. 4D |
FMBV-2 / 2% Mo:BiVO4-MIL-53(Fe) · Electrode
Three-electrode cell; 0.2 M Na2SO4 saturated with N2 for 30 min; AM 1.5G; 1.23 V vs RHE; Pt counter electrode. Separate online GC measured H2/O2 volumes up to 2 h.
| Property | Reported value | Normalised value | Uncertainty | Origin and quality | Source |
|---|---|---|---|---|---|
| FMBV-2 online-GC H2 volume-equivalent amount at 120 min | approximately 46 umol H2 evolved at 120 min | 46 umol | visual estimate from SI Fig. S11 axis | Figure Axis Approximate | 7 · Supplemental Figures · Fig. S11 |
| FMBV-2 H2 evolution amountMarked as a best value within this paper | 34.7 umol | 34.7 umol | — | Text Exact Reported | 5 · Results and discussion · Fig. 4D |
| FMBV-2 H2 improvement over FeOOH-2 controlMarked as a best value within this paper | nearly 2 times higher than FeOOH-modified Mo:BiVO4 | 2.03 fold | calculated from 34.7/17.07 | Calculated From Reported Approximate | 2 · Abstract / Results and discussion · Fig. 4D |
| FMBV-2 H2 improvement over 2% Mo:BiVO4Marked as a best value within this paper | nearly 7 times higher than pure 2% Mo:BiVO4 | 6.8 fold | calculated from 34.7/5.1 | Calculated From Reported Approximate | 2 · Abstract / Results and discussion · Fig. 4D |
| FMBV-2 H2:O2 evolution ratio | approximately kept at 2:1 | 2 H2/O2 molar ratio | — | Text Approximate | 5 · Results and discussion · Fig. S11 |
| FMBV-2 online-GC O2 volume-equivalent amount at 120 min | approximately 23 umol O2 evolved at 120 min | 23 umol | visual estimate from SI Fig. S11 axis | Figure Axis Approximate | 7 · Supplemental Figures · Fig. S11 |
| H2 GC calibration intercept | -1442.8 a.u. | -1442.8 a.u. | — | Text Exact Reported | 8 · Supplemental Figures · Fig. S12 |
| H2 GC calibration slope | A (a.u.) = 593.38905 x V (uL) - 1442.8 | 593.38905 a.u. uL^-1 | — | Text Exact Reported | 8 · Supplemental Figures · Fig. S12 |
2% Mo:BiVO4 photoanode · Electrode
Three-electrode cell; 0.2 M Na2SO4 saturated with N2 for 30 min; AM 1.5G; 1.23 V vs RHE; Pt counter electrode.
| Property | Reported value | Normalised value | Uncertainty | Origin and quality | Source |
|---|---|---|---|---|---|
| 2% Mo:BiVO4 H2 evolution amount | 5.1 umol | 5.1 umol | — | Text Exact Reported | 5 · Results and discussion · Fig. 4D |
nanoporous BiVO4 photoanode · Electrode
Chopped AM 1.5G illumination at fixed 1.0 V vs RHE in 0.2 M Na2SO4.
| Property | Reported value | Normalised value | Uncertainty | Origin and quality | Source |
|---|---|---|---|---|---|
| BiVO4 chopped i-t photocurrent at 1.0 V_RHE | 0.35 mA cm-2 | 0.35 mA cm^-2 | — | Text Exact Reported | 4 · Results and discussion · Fig. 4B |
FMBV-2 / 2% Mo:BiVO4-MIL-53(Fe) · Electrode
Chopped AM 1.5G illumination at fixed 1.0 V vs RHE in 0.2 M Na2SO4; extended stability up to 3600 s in SI Fig. S7.
| Property | Reported value | Normalised value | Uncertainty | Origin and quality | Source |
|---|---|---|---|---|---|
| FMBV-2 chopped i-t photocurrent at 1.0 V_RHEMarked as a best value within this paper | 1.67 mA cm-2 | 1.67 mA cm^-2 | — | Text Exact Reported | 4 · Results and discussion · Fig. 4B |
| FMBV-2 durability current after 3600 s at 1.0 V_RHE | approximately 1.0 mA cm-2 after 3600 s | 1 mA cm^-2 | visual estimate from SI Fig. S7 | Figure Axis Approximate | 5 · Supplemental Figures · Fig. S7 |
2% Mo:BiVO4 photoanode · Electrode
Chopped AM 1.5G illumination at fixed 1.0 V vs RHE in 0.2 M Na2SO4.
| Property | Reported value | Normalised value | Uncertainty | Origin and quality | Source |
|---|---|---|---|---|---|
| 2% Mo:BiVO4 chopped i-t photocurrent at 1.0 V_RHE | 0.55 mA cm-2 | 0.55 mA cm^-2 | — | Text Exact Reported | 4 · Results and discussion · Fig. 4B |
nanoporous BiVO4 photoanode · Electrode
Three-electrode cell, 0.2 M Na2SO4, Pt counter, SCE reference, AM 1.5G 100 mW cm-2 back-side illumination, scan 10 mV s-1, 0-1.6 V vs RHE.
| Property | Reported value | Normalised value | Uncertainty | Origin and quality | Source |
|---|---|---|---|---|---|
| BiVO4 photocurrent density at 1.23 V_RHE | 0.57 mA cm-2 at 1.23 VRHE | 0.57 mA cm^-2 | — | Text Exact Reported | 4 · Results and discussion · Fig. 4A |
FMBV-2 / 2% Mo:BiVO4-MIL-53(Fe) · Electrode
Three-electrode cell, 0.2 M Na2SO4, Pt counter, SCE reference, AM 1.5G 100 mW cm-2 back-side illumination, scan 10 mV s-1.
| Property | Reported value | Normalised value | Uncertainty | Origin and quality | Source |
|---|---|---|---|---|---|
| Dark current density | negligible current density under dark conditions | — | — | Text Qualitative | 4 · Results and discussion · Fig. 4A |
| FMBV-2 photocurrent density at 1.23 V_RHEMarked as a best value within this paper | 2.2 mA cm-2 at 1.23 VRHE | 2.2 mA cm^-2 | — | Text Exact Reported | 2, 4 · Abstract; Results and discussion · Fig. 4A |
pure MIL-53(Fe) photoanode · Electrode
Pure MIL-53(Fe) photoanode under dark and light conditions; exact electrolyte not restated in SI figure, likely PEC conditions from main text.
| Property | Reported value | Normalised value | Uncertainty | Origin and quality | Source |
|---|---|---|---|---|---|
| Pure MIL-53(Fe) low negative photocurrent | approximately -0.47 mA cm-2 near 0 V under light, approaching 0 mA cm-2 above about 1.0 V | -0.47 mA cm^-2 | visual estimate from plotted axis | Figure Axis Approximate | 5 · Supplemental Figures · Fig. S6 |
| Pure MIL-53(Fe) photoelectrode type | p-type characteristic | — | — | Text Qualitative | 4 · Results and discussion · Fig. S6 |
2% Mo:BiVO4 photoanode · Electrode
Three-electrode cell, 0.2 M Na2SO4, Pt counter, SCE reference, AM 1.5G 100 mW cm-2 back-side illumination, scan 10 mV s-1.
| Property | Reported value | Normalised value | Uncertainty | Origin and quality | Source |
|---|---|---|---|---|---|
| 2% Mo:BiVO4 photocurrent density at 1.23 V_RHE | 1.06 mA cm-2 at 1.23 VRHE | 1.06 mA cm^-2 | — | Text Exact Reported | 4 · Results and discussion · Fig. 4A |
BVO/MIL-53(Fe)-1 · Electrode
LSV and chopped i-t curves comparing BiVO4 and BVO/MIL-53(Fe)-1/-2/-3.
| Property | Reported value | Normalised value | Uncertainty | Origin and quality | Source |
|---|---|---|---|---|---|
| BVO/MIL-53(Fe)-1 photocurrent density at 1.4 V_RHEMarked as a best value within this paper | approximately 1.2 mA cm-2 | 1.2 mA cm^-2 | visual estimate from SI Fig. S8A | Figure Axis Approximate | 6 · Supplemental Figures · Fig. S8A |
| BVO/MIL-53(Fe)-2 initial chopped i-t peakMarked as a best value within this paper | approximately 0.34 mA cm-2 | 0.34 mA cm^-2 | visual estimate from SI Fig. S8B | Figure Axis Approximate | 6 · Supplemental Figures · Fig. S8B |
2% Mo:BiVO4/FeOOH-2 · Electrode
LSV, chopped i-t and EIS comparing 2% Mo:BiVO4 and FeOOH-1/-2/-3.
| Property | Reported value | Normalised value | Uncertainty | Origin and quality | Source |
|---|---|---|---|---|---|
| 2% Mo:BiVO4/FeOOH-2 EIS arc maximum -Z''Marked as a best value within this paper | approximately 5000 ohm maximum -Z'' | 5000 ohm | visual estimate from SI Fig. S10C | Figure Axis Approximate | 7 · Supplemental Figures · Fig. S10C |
| 2% Mo:BiVO4/FeOOH-2 chopped i-t peakMarked as a best value within this paper | approximately 0.82 mA cm-2 | 0.82 mA cm^-2 | visual estimate from SI Fig. S10B | Figure Axis Approximate | 7 · Supplemental Figures · Fig. S10B |
| 2% Mo:BiVO4/FeOOH-2 photocurrent density at 1.4 V_RHEMarked as a best value within this paper | approximately 1.8 mA cm-2 | 1.8 mA cm^-2 | visual estimate from SI Fig. S10A | Figure Axis Approximate | 7 · Supplemental Figures · Fig. S10A |
FMBV-2 / 2% Mo:BiVO4-MIL-53(Fe) · Electrode
LSV, chopped i-t, EIS and H2 production comparing 2% Mo:BiVO4, FMBV-1, FMBV-2 and FMBV-3.
| Property | Reported value | Normalised value | Uncertainty | Origin and quality | Source |
|---|---|---|---|---|---|
| FMBV-1 H2 evolution at 90 min | approximately 12.5 umol | 12.5 umol | visual estimate from SI Fig. S9D | Figure Axis Approximate | 6 · Supplemental Figures · Fig. S9D |
| FMBV-2 H2 evolution at 90 min in loading seriesMarked as a best value within this paper | approximately 35 umol | 35 umol | visual estimate from SI Fig. S9D, consistent with 34.7 umol text value | Figure Axis Approximate | 6 · Supplemental Figures · Fig. S9D |
| FMBV-2 photocurrent density at 1.4 V_RHE in loading seriesMarked as a best value within this paper | approximately 2.6 mA cm-2 at 1.4 V_RHE | 2.6 mA cm^-2 | visual estimate from SI Fig. S9A | Figure Axis Approximate | 6 · Supplemental Figures · Fig. S9A |
| FMBV-3 H2 evolution at 90 min | approximately 2 umol | 2 umol | visual estimate from SI Fig. S9D | Figure Axis Approximate | 6 · Supplemental Figures · Fig. S9D |