Miner E.M., Fukushima T., Sheberla D. et al. · Nature Communications · 2016 · 10942
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.
Ni3(HITP)2 is presented as an intrinsically conductive, well-defined MOF that electrocatalyses oxygen reduction in alkaline solution.
Caveat: Electrical conductivity value is cited from prior ref. 17, not measured in this article.
main p.1 · Abstract · Linked to 3 structured results
Similar ORR activity on ITO and glassy carbon supports indicates the MOF film itself, rather than glassy carbon enhancement, is the stand-alone electrocatalyst.
Caveat: ITO comparison is described qualitatively; exact ITO onset potential is not tabulated.
main p.2 · ORR activity of Ni3(HITP)2 · Supplementary Fig. 4 · Linked to 2 structured results
Koutecky-Levich electron-transfer numbers near 2 and Faradaic efficiency data show predominantly 2e- ORR to peroxide/HO2- under these alkaline conditions.
Caveat: Water-production Faradaic efficiency increases at larger overpotential; the authors note water selectivity should be increased for fuel-cell energy density.
main p.4 · Mechanistic insight into ORR on Ni3(HITP)2 · Fig. 4; Supplementary Table 7 · Linked to 3 structured results
Ni3(HITP)2 largely retains ORR activity and structural/morphological features after prolonged ORR electrolysis.
Caveat: XPS shows a +1 eV Ni2p shift and N1s change, so minor local electronic/ligand-field changes are possible even though activity and morphology are retained.
main p.4 · Discussion · Supplementary Figs. 5-11 · Linked to 5 structured results
The -128 mV dec-1 Tafel slope is interpreted as an irreversible one-electron pre-equilibrium, likely superoxide formation as the rate-limiting step.
Caveat: Mechanistic assignment is inferred from Tafel slope and the authors state detailed mechanistic investigations are underway.
main p.3 · Mechanistic insight into ORR on Ni3(HITP)2 · Fig. 3 · Linked to 2 structured results
Names and aliases are kept exactly within the paper’s own identity model.
| Material | Composition | Structure context | Source |
|---|---|---|---|
| Blank glassy carbon and ITO electrode controls | GCE or ITO | unknown · Model SystemNon-MOF electrode controls used to show the MOF film is the active ORR electrocatalyst. | main p.3 · ORR activity of Ni3(HITP)2 · Fig. 2 |
| Ni3(hexaiminotriphenylene)2Browse family: Ni₃(HITP)₂ / Ni–HITP | Ni3(HITP)2; HITP = 2,3,6,7,10,11-hexaiminotriphenyleneSquare-planar Ni-N4 sites in a nickel bis(iminosemiquinone/diimine-type) two-dimensional network. · 2,3,6,7,10,11-hexaiminotriphenylene (HITP), prepared from HATP.6HCl precursor. | 2D · PristineTwo-dimensionally layered conductive MOF, structurally reminiscent of M-Nx ORR electrocatalysts; long-range ab-plane order retained after ORR. | main p.2 · Introduction · Fig. 1 |
Sample form, processing state and composition status define the context for measurements.
| Sample | Form and role | Processing and geometry | Source |
|---|---|---|---|
| Blank glassy carbon electroderesearch_0003__mat__blank_electrode_controls | Electrode · Pristine Control · Model | Cleaned and polished but not modified with MOF.5 mm diameter glassy carbon button | main p.5 · Rotating disk and rotating ring-disk electrode investigations |
| Blank indium tin oxide electroderesearch_0003__mat__blank_electrode_controls | Electrode · Pristine Control · Model | Unmodified ITO control.Indium tin oxide | SI p.S3 · Supplementary Figure 4 · Supplementary Fig. 4 |
| Ni3(HITP)2 thin film on glassy carbon electroderesearch_0003__mat__ni3_hitp2 | Electrode · Target Sample · Pristine Framework | Solvothermally grown on polished glassy carbon; washed/heated in water and methanol; dried under dynamic vacuum.5 mm diameter glassy carbon disk electrode · about 120 nm; typical MOF loading about 5 ug | main p.2 · Synthesis and quantification of Ni3(HITP)2 |
| Ni3(HITP)2 thin film on indium tin oxide electroderesearch_0003__mat__ni3_hitp2 | Electrode · Target Sample · Pristine Framework | Ni3(HITP)2-modified ITO used for ORR comparison, AFM, Raman, SEM and grazing-incidence XRD.Indium tin oxide (ITO) · about 300 nm | main p.2 · Synthesis and quantification of Ni3(HITP)2 · Supplementary Fig. 1 |
| Ni3(HITP)2 black powder byproduct/bulk materialresearch_0003__mat__ni3_hitp2 | Powder · Target Sample · Pristine Framework | Black powder isolated from same reaction mixture and washed/heated in water and methanol, then vacuum dried. | main p.5 · Synthesis of the Ni3(HITP)2 film on glassy carbon electrode |