Electrochemistry Application — Activating a Metallization Switch for Record Hydrogen Evolution in Single-Atom Modified Polar MOF Piezocatalysts

3 measurement groups · 12 results

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

Ni SAs@UiO-66-NH2(Hf) powder · Powder

Ni SAs@UiO-66-NH2 tested at different ultrasound powers/frequencies and in deionized, tap and seawater matrices.

Property	Reported value	Normalised value	Uncertainty	Origin and quality	Source
Cumulative H2 production in deionized water after 3 hMarked as a best value within this paper	approximately 10000 umol g-1 after 3 h	—	—	Text Approximate	6 · Hydrogen Evolution Performance · Figure 3d
H2 evolution rate at 300 W ultrasoundMarked as a best value within this paper	approximately 2000 umol g-1 h-1	—	—	Text Approximate	6 · Hydrogen Evolution Performance · Figure 3c
Cumulative H2 production in seawater after 3 h	approximately 5000 umol g-1	—	—	Text Approximate	6 · Hydrogen Evolution Performance · Figure 3d
Cumulative H2 production in tap water after 3 h	approximately 7000 umol g-1	—	—	Text Approximate	6 · Hydrogen Evolution Performance · Figure 3d

Ni SAs@UiO-66-NH2(Hf) powder · Powder

2 mg catalyst in 10 mL aqueous solution, 45 mL borosilicate tube, Ar purge 5 min, ultrasonic bath, ice-water cooling, dark, gas sampled every 60 min.

Atmosphere: argon-purged headspace
Geometry: powder suspension
Context: Target catalyst compared with UiO-66 and UiO-66-NH2 controls.
Measurement source: SI text lines 22-23 · Piezocatalytic H2 production · Figure S11

Property	Reported value	Normalised value	Uncertainty	Origin and quality	Source
Cumulative H2 production of Ni SAs@UiO-66-NH2 in water after 3 hMarked as a best value within this paper	approaching 5000 umol g-1 after 3 h	—	—	Text Approximate	6 · Hydrogen Evolution Performance · Figure 3a
H2 evolution rate of Ni SAs@UiO-66-NH2 in deionized water	1871 umol g-1 h-1	—	—	Text Exact Reported	1 and 6 · Abstract / Hydrogen Evolution Performance · Figure 3e
Approximate cumulative H2 production of UiO-66 in water after 3 h	approximately 1600 umol g-1 after 3 h	—	—	Figure Axis Approximate	7 · Hydrogen Evolution Performance · Figure 3a
Approximate cumulative H2 production of UiO-66-NH2 in water after 3 h	approximately 3000 umol g-1 after 3 h	—	—	Figure Axis Approximate	7 · Hydrogen Evolution Performance · Figure 3a

Ni SAs@UiO-66-NH2(Hf) powder · Powder

10 vol% ethanol or methanol in water; compared against water; pure methanol control reported as negligible.

Atmosphere: argon-purged headspace
Geometry: powder suspension
Context: Target catalyst and framework controls in methanol-containing medium.
Measurement source: 6-7 · Hydrogen Evolution Performance · Figure 3e,f and Figure S13

Property	Reported value	Normalised value	Uncertainty	Origin and quality	Source
H2 evolution rate with ethanol sacrificial agent	5972 umol g-1 h-1	—	—	Text Exact Reported	6 · Hydrogen Evolution Performance · Figure 3e
H2 evolution of Ni SAs@UiO-66-NH2 under methanol as sacrificial mediumMarked as a best value within this paper	approaching 15 000 umol g-1 h-1	—	—	Text Approximate	6 · Hydrogen Evolution Performance · Figure 3f
H2 evolution rate with methanol sacrificial agentMarked as a best value within this paper	17 613 umol g-1 h-1	—	—	Text Exact Reported	1 and 6 · Abstract / Hydrogen Evolution Performance · Figure 3e
Turnover frequency of Ni single-atom sites	107.4 h-1	—	—	Text Exact Reported	7 · Hydrogen Evolution Performance