Spectroscopy — Conductive Metal-Organic Frameworks Bearing M−O4 Active Sites as Highly Active Biomass Valorization Electrocatalysts

4 measurement groups · 14 results

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

ATR-IR adsorption spectroscopy

Infrared spectroscopy

Co-CAT on flexible carbon cloth · Electrode

10 mM HMF in 1 M KOH; M-CAT electrode immersed and hydrated MOF spectrum subtracted.

Geometry: M-CAT electrode in ATR configuration
Context: Composite electrode sample
Measurement source: 5 · Results and Discussion · Figure 4a,b

Property	Reported value	Normalised value	Uncertainty	Origin and quality	Source
C=O band shift on Co-CAT adsorption	82.4 cm-1	—	—	Text Exact Reported	5 · Results and Discussion · Figure 4a
HMF alcohol-group IR band	1027 cm-1	—	—	Text Rounded Reported	5 · Results and Discussion · Figure 4b
HMF C=C band in alkaline solution	1515.8 cm-1	—	—	Text Exact Reported	5 · Results and Discussion · Figure 4a
HMF C=O band in alkaline solution	1654.7 cm-1	—	—	Text Exact Reported	5 · Results and Discussion · Figure 4a
C=O band shift on Ni-CAT adsorption	88.2 cm-1	—	—	Text Exact Reported	5 · Results and Discussion · Figure 4a
Ni-CAT adsorbed-HMF alcohol band 1	1023.4 cm-1	—	—	Text Exact Reported	5 · Results and Discussion · Figure 4b
Ni-CAT adsorbed-HMF alcohol band 2	1011.2 cm-1	—	—	Text Exact Reported	5 · Results and Discussion · Figure 4b

Potential-dependent operando ATR-IR difference spectroscopy

Infrared spectroscopy

Co-CAT on flexible carbon cloth · Electrode

Custom spectroelectrochemical cell; carbon cloth counter, Ag/AgCl reference; potentials stepped from most negative, approximately 4 min at each potential.

Geometry: Co-CAT on carbon cloth working electrode
Context: Composite electrode sample
Measurement source: 4 · 1.4 Operando spectroscopy · Figure 4c,e

Property	Reported value	Normalised value	Uncertainty	Origin and quality	Source
Operando IR HMFCA band on Co-CAT	1560 cm-1	—	—	Text Rounded Reported	5 · Results and Discussion · Figure 4c
Co-CAT operando band-growth threshold	bands begin to rise just past the CoII/III redox potential	—	—	Figure Axis Approximate	6 · Figure 4 caption · Figure 4e
Operando IR FDCA carboxylate band	1357.7 cm-1	—	—	Text Exact Reported	5 · Results and Discussion · Figure 4c,d

Potential-dependent operando ATR-IR difference spectroscopy

Infrared spectroscopy

Ni-CAT on flexible carbon cloth · Electrode

Custom spectroelectrochemical cell; carbon cloth counter, Ag/AgCl reference; potentials stepped from most negative, approximately 4 min at each potential.

Geometry: Ni-CAT on carbon cloth working electrode
Context: Composite electrode sample
Measurement source: 4 · 1.4 Operando spectroscopy · Figure 4d,f

Property	Reported value	Normalised value	Uncertainty	Origin and quality	Source
Operando IR HMFCA band on Ni-CAT	1569.8 cm-1	—	—	Text Exact Reported	5 · Results and Discussion · Figure 4d
Ni-CAT rapid spectral-change threshold	rapid increase once the NiII/III redox potential is reached	—	—	Figure Axis Approximate	6 · Figure 4 caption · Figure 4f

X-ray photoelectron spectroscopy

Co-CAT-Carbon Paper · Electrode

XPS before and after 6 h electrolysis at 1.42 V vs RHE; Mg X-ray source; calibrated to C 1s at 284.8 eV.

Geometry: M-CAT electrode after electrolysis
Context: Composite electrode sample
Measurement source: 3 · 1.2 Synthesis and characterization of M-CAT · Figure S7

Property	Reported value	Normalised value	Uncertainty	Origin and quality	Source
SEM structure retention after electrolysis	SEM after electrolysis showed retention of MOF structures on the surface	—	—	Qualitative Qualitative	5 · Results and Discussion · Figure S8
Transition-metal species retained after electrolysis	retained Co 2p and Ni 2p peaks suggest retention of transition metal species	—	—	Qualitative Qualitative	5 · Results and Discussion · Figure S7