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

2 measurement groups · 6 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

Coordination and functional-group analysis across UiO-66, UiO-66-NH2 and Ni SAs@UiO-66-NH2.

Geometry: powder
Context: Target sample compared with controls.
Measurement source: 5-6 · Electronic and Coordination · Figure 2f,g and Figures S7-S10

Property	Reported value	Normalised value	Uncertainty	Origin and quality	Source
FT-IR C-N stretching bands of UiO-66-NH2	1428 and 1253 cm-1	—	—	Text Exact Reported	5-6 · Electronic and Coordination · Figure 2g
FT-IR N-H stretching band of UiO-66-NH2	3462 cm-1	—	—	Text Exact Reported	5-6 · Electronic and Coordination · Figure 2g
N K-edge absorption peak shift after Ni incorporation	405.4 to 405.8 eV	—	—	Text Exact Reported	5 · Electronic and Coordination · Figure 2f

Ni SAs@UiO-66-NH2(Hf) powder · Powder

Compared Ni SAs@UiO-66-NH2 with NiO, LiNiO2 and Ni foil references.

Property	Reported value	Normalised value	Uncertainty	Origin and quality	Source
Average Ni-N bond length from EXAFS fitting	1.97 A	—	—	Text Exact Reported	4 · Electronic and Coordination · Figure 2d
Absence of high-R Ni-Ni/Ni-Hf EXAFS scattering	No signals observed beyond 2.5 A	—	—	Text Exact Reported	4 · Electronic and Coordination · Figure 2b,e
Ni K-edge pre-edge feature energy	approximately 8330 eV	—	—	Text Approximate	4 · Electronic and Coordination · Figure 2a