Zhang M., Hu D., Xu Z. et al. · Journal of Materials Science and Technology · 2021 · 172-179
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.
A graphitic-rod counter-electrode control preserves the same HER activity trend, with Ni-BTC retaining the lowest Tafel slope among the three metal-BTC electrodes.
Caveat: The supporting values are read from labels on SI Fig. S4b rather than prose or a table.
main p.5, article p.176 · Results and discussion · Fig. S4 · Linked to 3 structured results
Ni-BTC/CFP is the best-performing of the three metal-BTC HER electrodes, with the lowest overpotential, lowest Rct, largest Cdl/ECSA, highest mass activity and highest TOF.
Caveat: Performance is measured on composite MOF/CFP electrodes, not on an isolated pristine powder conductivity device.
main p.1, article p.172 · Abstract · Linked to 7 structured results
The paper describes the MOFs as conductive/electrocatalytic but does not report a direct electrical conductivity, Seebeck coefficient, or thermoelectric measurement for the pristine powders.
Caveat: Electrochemical impedance Rct values are application measurements on MOF/CFP electrodes and should not be treated as intrinsic electrical transport conductivity.
main p.1, article p.172 · Abstract · Linked to 3 structured results
Post-HER XRD and SEM suggest the metal-BTC/CFP electrodes retain their framework structure and morphology after reaction.
Caveat: Post-HER XRD and SEM evidence is qualitative in the extraction; no post-HER peak positions or morphology metrics were quantified.
main p.6, article p.177 · Results and discussion · Figs. S8-S9 · Linked to 3 structured results
The authors attribute superior HER activity to high porosity, large specific surface area, tunable composition, diverse morphology with high crystallinity, rich metal centres and high durability.
Caveat: This is an interpretive structure-performance claim; direct causal isolation of each structural factor is not demonstrated.
main p.7, article p.178 · Conclusions · Linked to 4 structured results
The three metal centres were chosen to span the HER volcano plot, with Ni and Co on the left side and Cu on the right side of the volcano peak.
Caveat: The volcano-plot rationale is a design framing rather than a directly measured thermodynamic descriptor in this paper.
main p.2, article p.173 · Introduction · Linked to 3 structured results
Names and aliases are kept exactly within the paper’s own identity model.
| Material | Composition | Structure context | Source |
|---|---|---|---|
| Co-BTC metal-organic framework | Co-BTC; exact empirical formula not reported in the extracted textCo(II) centres from cobalt(II) nitrate hexahydrate coordinated to BTC; XPS assigns Co(II) cations. · Benzene-1,3,5-tricarboxylic acid / BTC | unknown · PristineRod-shaped Co-BTC with PXRD assigned as isostructural to CCDC 245714. | main p.1, article p.172 · Abstract |
| Cu-BTC metal-organic framework | Cu-BTC; exact empirical formula not reported in the extracted textCu(II) centres from copper(II) nitrate hydrate coordinated to BTC; XPS assigns oxidised copper Cu(II). · Benzene-1,3,5-tricarboxylic acid / BTC | 3D · PristineRhombic octahedral Cu-BTC with PXRD assigned as isostructural to CCDC 846570. | main p.1, article p.172 · Abstract |
| Ni-BTC metal-organic framework | Ni-BTC; exact empirical formula not reported in the extracted textNi(II) centres from nickel(II) nitrate hexahydrate coordinated to BTC; XPS assigns high-spin Ni2+. · Benzene-1,3,5-tricarboxylic acid / BTC | unknown · PristineSpherical Ni-BTC with PXRD assigned as isostructural to CCDC 636900. | main p.1, article p.172 · Abstract |
| Commercial 20 wt% Pt/C benchmark catalyst | 20 wt% Pt/CPt nanoparticles on carbon; non-MOF benchmark. | unknown · CompositeCommercial catalyst benchmark for HER comparison. | main p.4, article p.175 · Results and discussion · Fig. 5 |
Sample form, processing state and composition status define the context for measurements.
| Sample | Form and role | Processing and geometry | Source |
|---|---|---|---|
| Co-BTC/CFP HER electroderesearch_0861__mat__co_btc | Electrode · Composite Sample · Composite | Co-BTC ink in isopropyl alcohol attached to CFP by 120 C oven treatment for 12 h and dried at 60 C for 6 h.Carbon fibre paper (CFP), 1 cm x 1 cm, active geometric area 1.0 cm2. | main p.3, article p.174 · Electrocatalytic hydrogen evolution reaction |
| As-prepared Co-BTC crystals/powderresearch_0861__mat__co_btc | Powder · Target Sample · Pristine Framework | Autoclave product washed several times with methanol and vacuum dried at 60 C. | SI text p.1 · Preparation and characterization of MOFs catalysts |
| Cu-BTC/CFP HER electroderesearch_0861__mat__cu_btc | Electrode · Composite Sample · Composite | Cu-BTC ink in isopropyl alcohol attached to CFP by 120 C oven treatment for 12 h and dried at 60 C for 6 h.Carbon fibre paper (CFP), 1 cm x 1 cm, active geometric area 1.0 cm2. | main p.3, article p.174 · Electrocatalytic hydrogen evolution reaction |
| As-prepared Cu-BTC blue crystals/powderresearch_0861__mat__cu_btc | Powder · Target Sample · Pristine Framework | Filtered, washed with water/ethanol, dried at 60 C for 12 h and vacuum dried for 5 h to remove trace DMF. | SI text p.1 · Preparation and characterization of MOFs catalysts |
| Ni-BTC/CFP HER electroderesearch_0861__mat__ni_btc | Electrode · Composite Sample · Composite | Ni-BTC ink in isopropyl alcohol attached to CFP by 120 C oven treatment for 12 h and dried at 60 C for 6 h.Carbon fibre paper (CFP), 1 cm x 1 cm, active geometric area 1.0 cm2. | main p.3, article p.174 · Electrocatalytic hydrogen evolution reaction |
| As-prepared Ni-BTC precipitate/powderresearch_0861__mat__ni_btc | Powder · Target Sample · Pristine Framework | Centrifuged from supernatant, washed with absolute methanol several times, and vacuum dried at 60 C for 12 h. | SI text p.1 · Preparation and characterization of MOFs catalysts |
| Commercial 20 wt% Pt/C HER benchmark electroderesearch_0861__mat__pt_c_benchmark | Electrode · Pristine Control · Composite | Commercial 20 wt% Pt/C tested as HER benchmark under the same figure context.Not specified in extracted text. | main p.4, article p.175 · Results and discussion · Fig. 5 |