Zhang J., Zong S., Xiong G. et al. · International Journal of Hydrogen Energy · 2025 · 95-102
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.
TIT-1@NS/NF shows HER activity comparable to Pt/C and better than TIT-1 and bare NF in the main results text.
Caveat: The paper reports conflicting TIT-1@NS HER overpotentials: 260 mV in results text, 270 mV in abstract and 296 mV in Table 1.
100 · 3.3. Electrochemical performance · Fig. 5c-d; Table 1 · Linked to 5 structured results
TIT-1@NS/NF is the best OER catalyst among the reported in-paper comparison set by overpotential at 10 mA cm-2.
Caveat: OER Tafel values in text appear inconsistent with labels visible in the rendered figure.
99 · 3.3. Electrochemical performance · Fig. 5a · Linked to 4 structured results
A TIT-1@NS/NF two-electrode cell drives overall water splitting in alkaline electrolyte with 1.68 V required for 100 mA cm-2 and close to 100% Faradaic efficiency.
Caveat: Exact gas-volume values are only read graphically from Fig. 7d.
101 · 3.4. Fabrication of an asymmetrical two-electrode electrolytic cell for overall water splitting · Fig. 7 · Linked to 5 structured results
PXRD and single-crystal data support formation of a pure-phase layered 2D nickel MOF, TIT-1, and retention of the TIT-1 phase after exfoliation to TIT-1@NS.
Caveat: Main text gives P1 while SI Table S1 gives P-1; no CIF is supplied locally for independent verification.
98 · 3.2. Structural characterization of TIT-1 and TIT-1@NS · Fig. 2 · Linked to 4 structured results
Rendered SI Table S1 and Table S2 provide crystallographic metrics for TIT-1, including formula C52H40N6Ni2O12, P-1 symmetry, unit-cell parameters and selected Ni coordination bond lengths/angles.
Caveat: CIF file is not supplied locally, so these table values are transcribed from the SI render rather than independently checked crystallographically.
4 · Table S1/Table S2 · Table S1; Table S2 · Linked to 5 structured results
The authors attribute improved electrocatalytic performance to the 2D nanosheet architecture, increased active area, enhanced electron/mass transfer and partially deprotonated carboxylate/open metal sites.
Caveat: Mechanistic attribution is largely inferential from morphology, ECSA/Cdl and electrochemical trends rather than direct operando measurement.
95 · Abstract · Linked to 4 structured results
Ultrasonication/exfoliation produces porous, rough TIT-1@NS nanosheets with a reported AFM thickness of 16.5 nm.
Caveat: Only a single reported AFM thickness is extracted; distribution statistics are not reported.
98 · 3.2. Structural characterization of TIT-1 and TIT-1@NS · Fig. 3 · Linked to 4 structured results
The authors use lower EIS charge-transfer resistance as evidence for higher conductivity and faster charge transfer in TIT-1@NS-based electrodes.
Caveat: No intrinsic electrical conductivity measurement is reported; EIS is an electrode/electrolyte charge-transfer proxy.
100 · 3.3. Electrochemical performance · Fig. S6 · Linked to 3 structured results
Names and aliases are kept exactly within the paper’s own identity model.
| Material | Composition | Structure context | Source |
|---|---|---|---|
| Nickel foam | Ni | unknown · UnknownCommercial nickel foam support and bare-electrode benchmark. | 97 · 2.4. Preparation of electrodes |
| Pt/C benchmark catalyst | Pt/C | unknown · UnknownCommercial benchmark catalyst for HER. | 99 · 3.3. Electrochemical performance · Fig. 5 |
| RuO2 benchmark catalyst | RuO2 | unknown · UnknownCommercial benchmark catalyst for OER. | 99 · 3.3. Electrochemical performance · Fig. 5 |
| TIT-1 | C52H40N6Ni2O12Ni nodes / Ni clusters · 2,3,5,6-tetracarboxyphenylpyrimidine (TCPP); 4,4'-bipyridine (BPY) | 2D · PristineTriclinic P-1 from SI Table S1; main text states P1; two-dimensional network; 4-connected topology with point symbol {4^4.6^2}; CCDC 2343823. | 97 · 3.1. Structural description of TIT-1 · Fig. 1 |
| TIT-1@NS | derived from TIT-1 (C52H40N6Ni2O12 framework composition reported for TIT-1)Ni nodes retained from TIT-1 · TCPP; BPY | 2D · PristineExfoliated nanosheet form of layered TIT-1; PXRD aligned with simulated TIT-1 and retained phase after water splitting. | 96 · Introduction · Scheme 1 |
Sample form, processing state and composition status define the context for measurements.
| Sample | Form and role | Processing and geometry | Source |
|---|---|---|---|
| bare NFresearch_0710__mat__nf_support | Electrode · Pristine Control · Unknown | Cleaned with deionized water, ethanol and acetone; dried.nickel foam | 97 · 2.4. Preparation of electrodes |
| Pt/C/NF benchmark electroderesearch_0710__mat__ptc_benchmark | Electrode · Pristine Control · Composite | 20 wt% Pt/C slurry with acetylene black and PVDF deposited on NF and dried.nickel foam | 97 · 2.4. Preparation of electrodes |
| RuO2/NF benchmark electroderesearch_0710__mat__ruo2_benchmark | Electrode · Pristine Control · Composite | RuO2 slurry with acetylene black and PVDF deposited on NF and dried.nickel foam | 97 · 2.4. Preparation of electrodes |
| TIT-1/NFresearch_0710__mat__tit1 | Electrode · Pristine Control · Composite | TIT-1 grown/prepared with nickel foam present during solvothermal preparation.nickel foam | 97 · 2.4. Preparation of electrodes |
| TIT-1@NS/NFresearch_0710__mat__tit1_ns | Electrode · Target Sample · Composite | TIT-1@NS supported on nickel foam by in-situ growth / solvothermal electrode preparation.nickel foam | 95 · Abstract |
| TIT-1@NSresearch_0710__mat__tit1_ns | Nanosheet · Target Sample · Pristine Framework | TIT-1 after 30 min simultaneous stirring and ultrasound, washing, centrifugation and lyophilisation.16.5 nm | 98 · 3.2. Structural characterization of TIT-1 and TIT-1@NS · Fig. 3 |
| TIT-1research_0710__mat__tit1 | Powder · Pristine Control · Pristine Framework | Solvothermally synthesised green powder; washed with ethanol and vacuum-dehydrated. | 96 · 2.2. Synthesis of TIT-1 |