Spectroscopy — Promoting ethylene production over a wide potential window on Cu crystallites induced and stabilized via current shock and charge delocalization

Measurement evidence

Spectroscopy

Promoting ethylene production over a wide potential window on Cu crystallites induced and stabilized via current shock and charge delocalization · Sun H., Chen L., Xiong L. et al. · Nature Communications · 2021 · 6823

2 measurement groups · 9 results

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

Operando Cu K-edge XAS/XANES and FT-EXAFS

X-ray absorption spectroscopy

KB@Cu3(HITP)2 CO2RR electrode · Electrode

CO2-saturated 0.1 M KHCO3 in H-cell; potential range 0 to -1.42 V; each spectrum 8 min.

Atmosphere: CO2-saturated electrolyte
Geometry: Operando H-shape cell, fluorescence mode, Lytle detector
Context: KB@Cu3(HITP)2 compared with stand-alone Cu3(HITP)2
Measurement source: 4 · Operando XAS on the Cu states · Fig. 3

Property	Reported value	Normalised value	Uncertainty	Origin and quality	Source
Metallic Cu-Cu bond distance in FT-EXAFS	2.2 Angstrom	—	—	Text Exact Reported	4 · Operando XAS on the Cu states · Fig. 3e
MOF-related Cu-N peak distance	1.5 Angstrom	—	—	Text Exact Reported	4 · Operando XAS on the Cu states · Fig. 3e
Time for Cu3(HITP)2 Cu state to match Cu foil XANES at -1.25 V	72 min	—	—	Text Exact Reported	4 · Operando XAS on the Cu states · Fig. 3d
Potential at which KB@Cu3(HITP)2 Cu state turns to Cu0	-0.86 V	—	—	Text Exact Reported	4 · Operando XAS on the Cu states · Fig. 3a
Time for KB@Cu3(HITP)2 Cu state to reduce to Cu0 at -1.25 V	within only 8 min	—	upper bound	Text Exact Reported	4 · Operando XAS on the Cu states · Fig. 3c

XPS and XANES

X-ray photoelectron spectroscopy X-ray absorption spectroscopy

As-synthesised Cu3(HITP)2 powder · Powder

Cu and N chemical-state characterisation of pristine Cu3(HITP)2.

Context: pristine Cu3(HITP)2
Measurement source: 2 · Structural characterization of Cu3(HITP)2 · Supplementary Figs. 2-4

Property	Reported value	Normalised value	Uncertainty	Origin and quality	Source
Cu+ Cu 2p3/2 binding energy	931.8 eV	—	—	Text Exact Reported	2 · Structural characterization of Cu3(HITP)2 · Supplementary Fig. 2
Cu2+ Cu 2p3/2 binding energy	933.5 eV	—	—	Text Exact Reported	2 · Structural characterization of Cu3(HITP)2 · Supplementary Fig. 2
N 1s Cu-N motif binding energy	398.5 eV	—	—	Text Exact Reported	2 · Structural characterization of Cu3(HITP)2 · Supplementary Fig. 4
N 1s uncoordinated amine shoulder	396.7 eV	—	—	Text Exact Reported	2 · Structural characterization of Cu3(HITP)2 · Supplementary Fig. 4