Spectroscopy — Boosting electrocatalytic CO2 reduction reaction over viologen-functionalized metal-organic frameworks by enhancement of electron-transfer capacity

Measurement evidence

Spectroscopy

Boosting electrocatalytic CO2 reduction reaction over viologen-functionalized metal-organic frameworks by enhancement of electron-transfer capacity · Dong Y.-L., Jing Z.-Y., Wu Q.-J. et al. · Journal of Materials Chemistry A · 2023 · 8739-8746

10 measurement groups · 18 results

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

in situ ATR-FTIR during CO2RR

Infrared spectroscopy

Vg-Por(Co)-MOF(9:1) · Powder

ATR-IR spectra in CO2-saturated 0.5 M KHCO3 at -0.6 V to identify intermediates.

Atmosphere: CO2-saturated 0.5 M KHCO3
Context: CO2RR mechanism
Measurement source: p006 / article 8744 · Results and discussion · Fig. S43

Property	Reported value	Normalised value	Uncertainty	Origin and quality	Source
*linear COL intermediate band**	1945 cm-1	—	—	Text Exact Reported	p006 / article 8744 · Results and discussion · Fig. S43
*COOH intermediate band	1400 cm-1	—	—	Text Exact Reported	p006 / article 8744 · Results and discussion · Fig. S43
*COOH signal peak time	about 180 s	—	—	Text Approximate	p006 / article 8744 · Results and discussion · Fig. S43

Co K-edge XANES/EXAFS

X-ray absorption spectroscopy

Vg-Por(Co)-MOF(9:1) · Powder

Co K-edge XANES and EXAFS fitted for Vg-Por(Co)-MOF(9:1) against Co foil, CoO and Co-TAPP.

Context: target sample
Measurement source: p003-p004 / article 8741-8742 · Results and discussion · Fig. 3, Table S3

Property	Reported value	Normalised value	Uncertainty	Origin and quality	Source
Co coordination number	4.11+-0.64	—	+-0.64	SI Table Exact Reported	p037 · Supporting tables · Table S3
Co-N distance	1.967 Angstrom	—	CN uncertainty +-0.64; sigma2 uncertainty +-4.82 x10^-3 Angstrom^2	SI Table Exact Reported	p037 · Supporting tables · Table S3

FT-IR

Infrared spectroscopy

MOF sample series · Powder

KBr-pellet FT-IR in 400-4000 cm-1 range, comparing ligands and MOFs.

Context: MOF series
Measurement source: p002 / article 8740 · Results and discussion · Fig. S10-S11

Property	Reported value	Normalised value	Uncertainty	Origin and quality	Source
coordinated carboxylate FT-IR peak	1399 cm-1	—	—	Text Exact Reported	p002 / article 8740 · Results and discussion · Fig. S10-S11
coordinated carboxylate FT-IR peak range	1626-1632 cm-1	—	—	Text Range	p002 / article 8740 · Results and discussion · Fig. S10-S11

ICP-AES elemental analysis

Bulk elemental and compositional analysis

Por(Co)-MOF · Powder

Co content measured by ICP-AES.

Context: MOF series
Measurement source: p037 · Supporting tables · Table S1

Property	Reported value	Normalised value	Uncertainty	Origin and quality	Source
Co content	2.75% by weight	—	—	SI Table Exact Reported	p037 · Supporting tables · Table S1

ICP-AES elemental analysis

Bulk elemental and compositional analysis

Vg-Por(Co)-MOF(1:1) · Powder

Co content measured by ICP-AES.

Context: MOF series
Measurement source: p037 · Supporting tables · Table S1

Property	Reported value	Normalised value	Uncertainty	Origin and quality	Source
Co content	1.6% by weight	—	—	SI Table Exact Reported	p037 · Supporting tables · Table S1

ICP-AES elemental analysis

Bulk elemental and compositional analysis

Vg-Por(Co)-MOF(2:1) · Powder

Co content measured by ICP-AES.

Context: MOF series
Measurement source: p037 · Supporting tables · Table S1

Property	Reported value	Normalised value	Uncertainty	Origin and quality	Source
Co content	2.14% by weight	—	—	SI Table Exact Reported	p037 · Supporting tables · Table S1

ICP-AES elemental analysis

Bulk elemental and compositional analysis

Vg-Por(Co)-MOF(5:1) · Powder

Co content measured by ICP-AES.

Context: MOF series
Measurement source: p037 · Supporting tables · Table S1

Property	Reported value	Normalised value	Uncertainty	Origin and quality	Source
Co content	2.3% by weight	—	—	SI Table Exact Reported	p037 · Supporting tables · Table S1

ICP-AES elemental analysis

Bulk elemental and compositional analysis

Vg-Por(Co)-MOF(9:1) · Powder

Co content measured by ICP-AES.

Context: MOF series
Measurement source: p037 · Supporting tables · Table S1

Property	Reported value	Normalised value	Uncertainty	Origin and quality	Source
Co content	2.67% by weight	—	—	SI Table Exact Reported	p037 · Supporting tables · Table S1

in situ UV spectroelectrochemistry

Vg-Por(Co)-MOF(9:1) · Powder

Vg-Por(Co)-MOF(9:1) electrochemical reduction in 0.2 M Na2SO4 from -0.421 to -1.221 V at 0.1 V intervals.

Atmosphere: 0.2 M Na2SO4
Context: redox-state mechanism
Measurement source: p006 / article 8744 · Results and discussion · Fig. S40

Property	Reported value	Normalised value	Uncertainty	Origin and quality	Source
Vg UV peak redshift	415 nm to 417 nm	—	—	Text Exact Reported	p006 / article 8744 · Results and discussion · Fig. S40
Vg UV peak redshift	527 nm to 535 nm	—	—	Text Exact Reported	p006 / article 8744 · Results and discussion · Fig. S40

XPS

X-ray photoelectron spectroscopy

Vg-Por(Co)-MOF(9:1) · Powder

High-resolution N 1s and Co 2p spectra for Por(Co)-MOF, Vg-MOF and Vg-Por(Co)-MOF(9:1), including after CO2RR.

Context: target and controls
Measurement source: p002 / article 8740 · Results and discussion · Fig. S12

Property	Reported value	Normalised value	Uncertainty	Origin and quality	Source
Co 2p1/2	794.9 eV	—	—	Text Exact Reported	p002 / article 8740 · Results and discussion · Fig. S12b
Co 2p3/2	779.9 eV	—	—	Text Exact Reported	p002 / article 8740 · Results and discussion · Fig. S12b
N 1s cobalt porphyrin ring	398.1 eV	—	—	Text Exact Reported	p002 / article 8740 · Results and discussion · Fig. S12a
N 1s pyridine ring	399.8 eV	—	—	Text Exact Reported	p002 / article 8740 · Results and discussion · Fig. S12a