Spectroscopy — Ultrafast transformation of metal-organic frameworks into advanced oxygen evolution electrocatalysts with good universality and scalability

3 measurement groups · 13 results

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

Fe-CoNi MOFs on Ni foam, 0.10 M Fe(NO3)3 · Electrode

Characterisation after 100 h at 100 mA cm^-2; Raman from OCP to 1.5 V vs RHE.

Geometry: OER electrode
Context: Active species identification for CoNi MOFs and Fe-CoNi MOFs.
Measurement source: 17557 · Results and discussion · Fig. 4a-c; Fig. S26-S30

Property	Reported value	Normalised value	Uncertainty	Origin and quality	Source
Post-OER real active species	Both CoNi MOFs and Fe-CoNi MOFs reconstruct into amorphous metal oxyhydroxides during OER.	—	—	Text Qualitative	17557 · Results and discussion · Fig. 4; Fig. S26-S30
Original CoNi MOFs Raman peaks	684, 424, 309 and 255 cm^-1 gradually disappear above 1.2 V vs RHE	—	—	Text Rounded Reported	17557 · Results and discussion · Fig. 4b
Oxyhydroxide Raman peaks after reconstruction	~460 and 540 cm^-1	—	—	Text Approximate	17557 · Results and discussion · Fig. 4b-c

Fe-CoNi MOFs on Ni foam, 0.10 M Fe(NO3)3 · Electrode

Co, Ni and Fe K-edge XANES/FT-EXAFS of CoNi MOFs, Fe-CoNi MOFs and foil references.

Property	Reported value	Normalised value	Uncertainty	Origin and quality	Source
CoNi MOFs Co-M second shell	2.50 A	—	—	Text Approximate	17554 · Results and discussion · Fig. 2g
CoNi MOFs Co-N/O first shell	~1.51 A	—	—	Text Approximate	17554 · Results and discussion · Fig. 2g
Fe-CoNi MOFs Co-M shell distance	2.69 A	—	—	Text Approximate	17554 · Results and discussion · Fig. 2g
Fe-CoNi MOFs Ni-M shell distance	2.62 A	—	—	Text Approximate	17554 · Results and discussion · Fig. 2h
Ni-N/O first shell	1.41 A	—	—	Text Approximate	17554 · Results and discussion · Fig. 2h

Fe-CoNi MOFs on Ni foam, 0.10 M Fe(NO3)3 · Electrode

High-resolution Co 2p, Ni 2p, Fe 2p, C 1s, N 1s and O 1s spectra.

Property	Reported value	Normalised value	Uncertainty	Origin and quality	Source
CoNi MOFs Co 2p3/2 Co2+ binding energy	783.6 eV	—	—	Text Exact Reported	17554 · Results and discussion · Fig. 2a
CoNi MOFs Co 2p3/2 Co3+ binding energy	780.5 eV	—	—	Text Exact Reported	17554 · Results and discussion · Fig. 2a
Fe-CoNi MOFs Fe3+ Fe 2p doublet	711.8 and 724.2 eV	—	—	Text Exact Reported	17554 · Results and discussion · Fig. 2c
Fe-CoNi MOFs shifted Co 2p3/2 lower-energy peak	780.1 eV	—	—	Text Exact Reported	17554 · Results and discussion · Fig. 2a
Ni 2p Ni2+ doublet	854.4 and 872.4 eV	—	—	Text Exact Reported	17554 · Results and discussion · Fig. 2b