John G., Priyadarshini S., babu A. et al. · Chemosphere · 2024 · 140574
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.
24-BNZ functions as a bifunctional electro/photo catalyst for water splitting, with low OER/HER overpotentials, 1.63 V overall cell voltage and highest photocatalytic H2/O2 rates in the sample series.
Caveat: Electrode performance is measured for composite electrodes containing carbon black/PVDF on nickel foam; photocatalysis uses sacrificial reagents.
1-2,9-10 · Abstract; Conclusions · Figs. 6-8 · Linked to 7 structured results
Twenty-four-hour boronization gives the optimum crystalline-to-amorphous transformation state, producing crystalline/amorphous boundaries that improve electrocatalytic and photocatalytic water splitting.
Caveat: The mechanistic link is inferred by authors from microscopy/XRD/XPS correlations and catalytic trends, not isolated from all other variables such as surface area and defect density.
2,9 · Abstract; Conclusions · Linked to 5 structured results
The 24-BNZ flower-like structure exposes active sites and increases accessible surface area, contributing to catalytic activity and stability.
Caveat: Only 24-BNZ porosity values are text-reported; comparison porosity for the full boronization series was not available in the supplied text.
5,10 · 3.1; Conclusions · Fig. 4 · Linked to 7 structured results
NaBH4 acts as both boron source and reductant, creating oxygen defects, partially disrupting Ni-N bonds, and forming Ni-B/O-B bonding in 24-BNZ.
Caveat: Bond assignments are based on XPS peak positions and literature comparisons; no direct quantitative composition table was readable in the supplied SI text.
6-7 · 3.1 Characterization · Fig. 5 · Linked to 3 structured results
Crystalline/amorphous contacts and flower morphology are proposed to reduce electron transport barriers and charge-transfer resistance, supporting faster OER/HER kinetics.
Caveat: Evidence is electrochemical charge-transfer resistance in composite electrodes, not intrinsic solid-state conductivity of the MOF powder.
8-9 · 3.2; 3.3 · Figs. 6, 8 · Linked to 6 structured results
Names and aliases are kept exactly within the paper’s own identity model.
| Material | Composition | Structure context | Source |
|---|---|---|---|
| Boronized Ni-ZIF (BNZ) | Boronized Ni-ZIF with Ni-B/O-B bonding and oxygen vacanciesNickel centres retained from Ni-ZIF; partial Ni-N disruption and Ni-B bond formation after NaBH4 treatment · 2-methylimidazolate-derived framework partially modified by boronization | 3D · DerivedBoronized derivative of Ni-ZIF with flower-like morphology and crystalline/amorphous phase boundaries; optimum 24 h boronization. | 2 · 2.3 Preparation of boronized Ni-ZIF (BNZ); Abstract · Fig. 1 |
| Nickel foam control/substrate | Ni foamMetallic nickel foam | unknown · UnknownConductive nickel foam substrate and bare-control electrode. | 2 · 2.1 Preparation of electrocatalyst |
| Nickel zeolite imidazolate framework (Ni-ZIF; NZ) | Ni-ZIF from Ni(NO3)2.6H2O and 2-methylimidazoleNickel nodes from nickel nitrate hexahydrate · 2-methylimidazole / imidazolate linker | 3D · PristineZeolite imidazolate framework; XRD peak near 12 degrees assigned to the (211) plane; highly crystalline nanobud morphology. | 2 · 2.2 Preparation of Ni-ZIF (NZ); 3.1 Characterization of BNZ · Fig. 2 |
Sample form, processing state and composition status define the context for measurements.
| Sample | Form and role | Processing and geometry | Source |
|---|---|---|---|
| 24-BNZ composite electrode on nickel foamresearch_0707__mat__mat_bnz | Electrode · Composite Sample · Composite | 24-BNZ active powder with carbon black/PVDF binder drop-cast on nickel foam and dried at 80 deg C for 1 day; also used as both anode and cathode for two-electrode overall water splitting.Nickel foam, 1 x 1 cm working area · not reported | 3,8 · 2.5 Electrocatalytic measurements; 3.2 · Figs. 6-7 |
| 24-BNZ powder / 24 h boronized Ni-ZIFresearch_0707__mat__mat_bnz | Powder · Target Sample · Doped | Ni-ZIF immersed in 1 M NaBH4 aqueous solution for 24 h, washed with DI water and ethanol, dried overnight at 80 deg C.none | 2-5 · 2.3 Preparation of BNZ; 3.1 Characterization · Figs. 3d, 4d-k |
| 48-BNZ composite electrode on nickel foamresearch_0707__mat__mat_bnz | Electrode · Composite Sample · Composite | 48-BNZ active powder with carbon black/PVDF binder drop-cast on nickel foam and dried at 80 deg C for 1 day.Nickel foam, 1 x 1 cm working area · not reported | 3,8 · 2.5 Electrocatalytic measurements; 3.2 · Fig. 6 |
| 48-BNZ powder / 48 h boronized Ni-ZIFresearch_0707__mat__mat_bnz | Powder · Target Sample · Doped | Ni-ZIF immersed in 1 M NaBH4 aqueous solution for 48 h, washed with DI water and ethanol, dried overnight at 80 deg C.none | 2-4 · 2.3 Preparation of BNZ; 3.1 Characterization · Fig. 3f |
| 4-BNZ composite electrode on nickel foamresearch_0707__mat__mat_bnz | Electrode · Composite Sample · Composite | 4-BNZ active powder with carbon black/PVDF binder drop-cast on nickel foam and dried at 80 deg C for 1 day.Nickel foam, 1 x 1 cm working area · not reported | 3,8 · 2.5 Electrocatalytic measurements; 3.2 · Fig. 6 |
| 4-BNZ powder / 4 h boronized Ni-ZIFresearch_0707__mat__mat_bnz | Powder · Target Sample · Doped | Ni-ZIF immersed in 1 M NaBH4 aqueous solution for 4 h, washed with DI water and ethanol, dried overnight at 80 deg C.none | 2-4 · 2.3 Preparation of BNZ; 3.1 Characterization · Fig. 3b |
| 9-BNZ composite electrode on nickel foamresearch_0707__mat__mat_bnz | Electrode · Composite Sample · Composite | 9-BNZ active powder with carbon black/PVDF binder drop-cast on nickel foam and dried at 80 deg C for 1 day.Nickel foam, 1 x 1 cm working area · not reported | 3,8 · 2.5 Electrocatalytic measurements; 3.2 · Fig. 6 |
| 9-BNZ powder / 9 h boronized Ni-ZIFresearch_0707__mat__mat_bnz | Powder · Target Sample · Doped | Ni-ZIF immersed in 1 M NaBH4 aqueous solution for 9 h, washed with DI water and ethanol, dried overnight at 80 deg C.none | 2-4 · 2.3 Preparation of BNZ; 3.1 Characterization · Fig. 3c |
| Bare nickel foam electroderesearch_0707__mat__mat_nf | Electrode · Pristine Control · Unknown | Bare NF control used in OER/HER comparison plots.Nickel foam · 1.5 mm thickness | 7 · 3.2 Electrocatalytic activity · Fig. 6 |
| NZ composite electrode on nickel foamresearch_0707__mat__mat_ni_zif | Electrode · Composite Sample · Composite | Ink/slurry electrode containing active material, carbon black and PVDF drop-cast on nickel foam and dried 1 day at 80 deg C.Nickel foam, 1 x 1 cm working area · not reported | 3,8 · 2.5 Electrocatalytic measurements; 3.2 · Fig. 6 |
| NZ powder / bare Ni-ZIF nanobudsresearch_0707__mat__mat_ni_zif | Powder · Pristine Control · Pristine Framework | Hydrothermal Ni-ZIF powder dried overnight at 80 deg C; used as pristine photocatalyst and electrode active material.none for powder; Al foil for EDS only | 2-4 · 2.2 Preparation of Ni-ZIF; 3.1 Characterization · Fig. 3a |