Spectroscopy — In situ growth of ultrathin Co-MOF nanosheets on Α-Fe2O3 hematite nanorods for efficient photoelectrochemical water oxidation

6 measurement groups · 11 results

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

Fe2O3@Co-MOF varied Co/MIm ratio series · Electrode

Supplemental UV-vis absorbance spectra for bare hematite and Fe2O3@0.1Co@0.4/0.8/1.6MIm ratio series.

Property	Reported value	Normalised value	Uncertainty	Origin and quality	Source
bare Fe2O3 absorbance near 400 nm	approximately 2.45 a.u. at 400 nm	—	—	Figure Axis Approximate	p003 / SI p3 · Supporting information · Fig. S4
Fe2O3@0.1Co@0.8MIm absorbance near 400 nm	approximately 2.55 a.u. at 400 nm	—	—	Figure Axis Approximate	p003 / SI p3 · Supporting information · Fig. S4

Fe2O3@0.1Co@0.8MIm · Electrode

Survey XPS comparison of pristine ZIF-67 and Fe2O3@0.1Co@0.8MIm.

Property	Reported value	Normalised value	Uncertainty	Origin and quality	Source
target XPS survey elements	Fe, O, Co, N and C survey peaks observed for Fe2O3@0.1Co@0.8MIm	—	—	Visual Estimate Qualitative	p004 / SI p4 · Supporting information · Fig. S7

Fe2O3@Co-MOF varied Co/MIm ratio series · Electrode

Optical absorption of surface-modified alpha-Fe2O3 films; BaSO4 reference.

Geometry: thin-film photoanodes
Context: composite/control series
Measurement source: p004 / journal p391 · 3 Results and discussion · Figs. S3-S4

Property	Reported value	Normalised value	Uncertainty	Origin and quality	Source
light absorption effect	Co-MOF-modified samples show similar absorbance; Co-only alpha-Fe2O3/0.1Co differs	—	—	Qualitative Qualitative	p004 / journal p391 · 3 Results and discussion · Figs. S3-S4

Fe2O3@0.1Co · Electrode

Fresh and recovered Co-only hematite photoanodes measured with Al Kalpha XPS.

Property	Reported value	Normalised value	Uncertainty	Origin and quality	Source
Co-only XPS after PEC	shape and position changed significantly; smaller spin-orbit splitting, narrower FWHM and lower binding energy suggest Co(III)	—	—	Qualitative Qualitative	p005 / journal p392 · 3 Results and discussion · Fig. 4

Fe2O3@0.1Co@0.8MIm · Electrode

Fresh and recovered target Co-MOF hematite photoanodes measured with Al Kalpha XPS.

Property	Reported value	Normalised value	Uncertainty	Origin and quality	Source
fresh catalyst Co 2p1/2 binding energy	796.9 eV	—	—	Text Exact Reported	p005 / journal p392 · 3 Results and discussion · Fig. 4
fresh catalyst Co 2p3/2 binding energy	781.1 eV	—	—	Text Exact Reported	p005 / journal p392 · 3 Results and discussion · Fig. 4
Co 2p shift after PEC	slight shift to lower binding energies after PEC reaction	—	—	Qualitative Qualitative	p005 / journal p392 · 3 Results and discussion · Fig. 4

Co-MOF powder / pristine ZIF-67 reference · Powder

XPS used to compare Co-N4 and coordinatively unsaturated Co-Nx environments.

Property	Reported value	Normalised value	Uncertainty	Origin and quality	Source
target unsaturated Co-Nx enrichmentMarked as a best value within this paper	Co-Nx geometric type increased significantly versus pristine ZIF-67	—	—	Qualitative Qualitative	p008 / journal p395 · 3 Results and discussion · Fig. 7
ZIF-67 Co-N4 component	781.9 eV assigned to Co-N4 environment	—	—	Text Exact Reported	p008 / journal p395 · 3 Results and discussion · Fig. 7
ZIF-67 Co-Nx component	780.6 eV assigned to Co-Nx (x < 4) geometry	—	—	Text Exact Reported	p008 / journal p395 · 3 Results and discussion · Fig. 7