Zhang Q., Wang H., Dong Y. et al. · Solar Energy · 2018 · 388-396
Open a family to keep every result attached to its sample, method and conditions.
Paraphrased for this database from the authors’ stated interpretations — never quoted verbatim — and kept separate from reported measurements.
In situ Co-MOF nanosheets on hematite substantially improve PEC water oxidation performance versus bare hematite, reaching 2.0 mA cm^-2 at 1.23 V_RHE and shifting onset cathodically.
Caveat: Application performance is measured for composite photoanodes; intrinsic MOF electronic conductivity is not measured separately.
p001 / journal p388 · Abstract · Linked to 5 structured results
The authors argue that Co-MOF surface modification does not obviously affect light absorption, so PEC enhancement is attributed mainly to charge-transfer/catalytic effects rather than optical absorption changes.
Caveat: Rendered SI UV-vis plots support the trend, but numerical absorbance values are visual estimates and no tabulated optical data were provided.
p004 / journal p391 · 3 Results and discussion · Figs. S3-S4 · Linked to 3 structured results
Nanosheet-structured Co-MOF gives better catalytic activity than thicker/polyhedral Co-MOF formed at higher precursor concentrations because it better connects hematite nanorods with the electrolyte.
Caveat: Morphology-performance link is inferred from SEM and J-V trends; no direct thickness or surface-area quantification is provided.
p007 / journal p394 · 3 Results and discussion · Linked to 3 structured results
Compared with pristine ZIF-67 powder, the in situ Co-MOF on hematite has more coordinatively unsaturated Co-Nx species, which are proposed as active centres for oxygen evolution.
Caveat: Relative amount is described qualitatively; no numerical deconvolution percentages were reported in the accessible text.
p008 / journal p395 · 3 Results and discussion · Fig. 7 · Linked to 3 structured results
The Co-MOF layer improves interfacial charge transfer and hole storage, evidenced by high Css and very low Rct,ss for Fe2O3@0.1Co@0.8MIm.
Caveat: EIS fit units are presented inconsistently between table header (ohm) and discussion (ohm cm2).
p007 / journal p394 · 3 Results and discussion · Linked to 5 structured results
Names and aliases are kept exactly within the paper’s own identity model.
| Material | Composition | Structure context | Source |
|---|---|---|---|
| Co-MOF nanosheet-modified alpha-Fe2O3 hematite photoanode | Fe2O3@Co-MOF; Co/2-methylimidazolate coordination polymer, exact formula not reportedCo2+ nodes in Co-Nx coordination environments on hematite · 2-methylimidazolate / 2-methylimidazole-derived linkers | 2D · CompositeIn situ Co-MOF nanosheets or thicker polyhedral Co-MOF depending on precursor concentration; target sample is amorphous/nanosheet-like rather than well-crystallised ZIF-67. | p003 / journal p390 · 3 Results and discussion · Fig. 1 |
| CoOx/Co-modified alpha-Fe2O3 hematite control | Fe2O3@CoOx / Fe2O3@0.1CoCo oxide species on hematite · none | unknown · CompositeGel-like CoOx crystallites covering/filling hematite nanorods after Co nitrate treatment. | p003 / journal p390 · 3 Results and discussion · Fig. 1b |
| alpha-Fe2O3 hematite film on FTO | alpha-Fe2O3Fe(III) oxide lattice · none | unknown · PristineHematite nanorod array; XRD peaks assigned to alpha-Fe2O3 (110) and (300). | p002 / journal p389 · 2.1 Material preparation |
| 2-methylimidazole-modified alpha-Fe2O3 hematite control | Fe2O3@MImFe(III) oxide lattice only; no Co nodes · adsorbed 2-methylimidazole | unknown · CompositeMIm-treated hematite with little morphological change. | p003 / journal p390 · 3 Results and discussion · Fig. 1c |
| Co-MOF powder reference / pristine ZIF-67Browse family: ZIF-67 / Co(mIm)₂ | Co(2-methylimidazolate)2-like; exact formula not reportedCo2+ · 2-methylimidazolate | 3D · PristinePowder particles show diffraction peaks consistent with simulated sodalite structure; used as pristine ZIF-67 reference in XPS comparison. | p004 / journal p391 · 3 Results and discussion · Fig. S2 / Fig. 7 |
Sample form, processing state and composition status define the context for measurements.
| Sample | Form and role | Processing and geometry | Source |
|---|---|---|---|
| bare Fe2O3research_0455__mat__hematite_film | Electrode · Pristine Control · Unknown | Hydrothermal FeOOH film converted by annealing at 550 C for 2 h and 750 C for 15 min in air.FTO (F:SnO2) conductive glass · not reported | p002 / journal p389 · 2.1(a) |
| Fe2O3@0.05Co@0.4MImresearch_0455__mat__co_mof_hematite_composite | Electrode · Composite Sample · Composite | Co-modified hematite immersed in aqueous 2-methylimidazole, washed, and heated at 70 C; precursor concentrations encoded in sample name.FTO conductive glass with hematite nanorod film · not reported | p002 / journal p389 · 2.1(d) |
| Fe2O3@0.05Co@0.8MImresearch_0455__mat__co_mof_hematite_composite | Electrode · Composite Sample · Composite | Co-modified hematite immersed in aqueous 2-methylimidazole, washed, and heated at 70 C; precursor concentrations encoded in sample name.FTO conductive glass with hematite nanorod film · not reported | p002 / journal p389 · 2.1(d) |
| Fe2O3@0.1Coresearch_0455__mat__co_oxide_hematite_control | Electrode · Pristine Control · Composite | Bare hematite spin-coated with 0.1 M Co(NO3).6H2O solution and heated at 70 C for 20 min.FTO conductive glass with hematite film · not reported | p002 / journal p389 · 2.1(b) |
| Fe2O3@0.1Co@0.4MImresearch_0455__mat__co_mof_hematite_composite | Electrode · Composite Sample · Composite | Co-modified hematite immersed in aqueous 2-methylimidazole, washed, and heated at 70 C; precursor concentrations encoded in sample name.FTO conductive glass with hematite nanorod film · not reported | p002 / journal p389 · 2.1(d) |
| Fe2O3@0.1Co@0.8MImresearch_0455__mat__co_mof_hematite_composite | Electrode · Target Sample · Composite | Co-modified hematite immersed in aqueous 2-methylimidazole, washed, and heated at 70 C; precursor concentrations encoded in sample name.FTO conductive glass with hematite nanorod film · not reported | p002 / journal p389 · 2.1(d) |
| Fe2O3@0.1Co@1.6MImresearch_0455__mat__co_mof_hematite_composite | Electrode · Composite Sample · Composite | Co-modified hematite immersed in aqueous 2-methylimidazole, washed, and heated at 70 C; precursor concentrations encoded in sample name.FTO conductive glass with hematite nanorod film · not reported | p002 / journal p389 · 2.1(d) |
| Fe2O3@0.2Co@0.8MImresearch_0455__mat__co_mof_hematite_composite | Electrode · Composite Sample · Composite | Co-modified hematite immersed in aqueous 2-methylimidazole, washed, and heated at 70 C; precursor concentrations encoded in sample name.FTO conductive glass with hematite nanorod film · not reported | p002 / journal p389 · 2.1(d) |
| Fe2O3@0.2Co@1.6MImresearch_0455__mat__co_mof_hematite_composite | Electrode · Composite Sample · Composite | Co-modified hematite immersed in aqueous 2-methylimidazole, washed, and heated at 70 C; precursor concentrations encoded in sample name.FTO conductive glass with hematite nanorod film · not reported | p002 / journal p389 · 2.1(d) |
| Fe2O3@0.3Co@2.4MImresearch_0455__mat__co_mof_hematite_composite | Electrode · Composite Sample · Composite | Co-modified hematite immersed in aqueous 2-methylimidazole, washed, and heated at 70 C; precursor concentrations encoded in sample name.FTO conductive glass with hematite nanorod film · not reported | p002 / journal p389 · 2.1(d) |
| Fe2O3@0.8MImresearch_0455__mat__mim_hematite_control | Electrode · Pristine Control · Composite | Bare hematite immersed in 0.8 M 2-methylimidazole for 20 min, washed, heated at 70 C for 20 min.FTO conductive glass with hematite film · not reported | p002 / journal p389 · 2.1(c) |
| Fe2O3@Co-MOF varied Co/MIm ratio seriesresearch_0455__mat__co_mof_hematite_composite | Electrode · Paper Level Unspecified · Composite | Series of Fe2O3@Co-MOF photoanodes prepared with varied Co(NO3)2 and 2-methylimidazole concentrations.FTO conductive glass with hematite films · not reported | p006 / journal p393 · 3 Results and discussion · Fig. 5 |
| Co-MOF powder / pristine ZIF-67 referenceresearch_0455__mat__zif67_co_mof_powder | Powder · Pristine Control · Pristine Framework | 0.1 M Co2+ and 0.8 M 2-methylimidazole solutions directly mixed for 20 min, centrifuged and washed.none · not applicable | p004 / journal p391 · 3 Results and discussion |