Lv J., Li W., Li J. et al. · Angewandte Chemie - International Edition · 2023 · e202217958
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.
Weak interlayer interaction and AA' stacking allow 2D-vc-MOF(Cu) to be exfoliated into nanosheets by simple dry grinding while retaining the framework chemistry.
Caveat: Exfoliation yield is not quantified.
3 · The Synthesis and Characterization of 2D-vc-MOF(Cu) · Figures S17-S22 · Linked to 3 structured results
The vertically extended 2D-vc-MOF(Cu) structure provides fully exposed periodically arranged CuO4 active sites, facilitating CO2 mass transfer and improving CO2RR performance relative to planar Cu3(HHTP)2.
Caveat: Cu3(HHTP)2 synthesis details are not reproduced; comparison is application-focused rather than a full structural-control synthesis study.
4 · The e-CO2RR Performance of 2D-vc-MOF(Cu) · Figure 4 · Linked to 5 structured results
A suitable amount of oxygen is vital for forming crystalline 2D-vc-MOF(Cu), likely because O2 partially oxidises HHTC to semiquinone species during synthesis.
Caveat: Mechanistic assignment is inferred by the authors from EPR/XPS and oxygen-volume optimisation; exact oxygen amount for the optimal sealed-vial synthesis is not specified.
2-3 · The Synthesis and Characterization of 2D-vc-MOF(Cu) · Figures S5, S9-S10 · Linked to 1 structured result
Pressed-pellet conductivity increases with pressing pressure because reduced grain-boundary resistance improves interparticle contact.
Caveat: The reported conductivity is pellet-form and pressure-dependent; intrinsic single-domain conductivity is not measured.
4 · The e-CO2RR Performance of 2D-vc-MOF(Cu) · Figure S25 · Linked to 2 structured results
DFT attributes the improved methane selectivity/activity to stronger CO2 adsorption and a lower potential-determining-step energy on the vertically extended 2D-vc-MOF(Cu) framework.
Caveat: DFT uses ideal monolayer slab models rather than full electrolyte/electrode environments.
5 · The e-CO2RR Mechanism of 2D-vc-MOF(Cu) · Figure 5 · Linked to 4 structured results
Names and aliases are kept exactly within the paper’s own identity model.
| Material | Composition | Structure context | Source |
|---|---|---|---|
| 2D-vc-MOF(Cu) | Cu3C40O12H16CuO4 units from Cu2+ nodes · 2,3,6,7,14,15-hexahydroxyltriptycene (HHTC) | 2D · PristineTriptycene-based vertically extended conductive 2D MOF with AA' slipped stacking; Pawley-refined cell a = b = 21.419 A, c = 13.473 A, alpha = beta = 90 deg, gamma = 120 deg in P21. | 1-3 · Abstract; Results and Discussion · Figure 1; Figure S14; Tables S4-S5 |
| monolayer 2D-vc-MOF(Cu) DFT model | model of 2D-vc-MOF(Cu)CuO4 model sites · HHTC-derived framework model | 2D · Model SystemMonolayer slab with vacuum in the c direction for CO2RR intermediate optimisation. | 4-5 · The e-CO2RR Mechanism of 2D-vc-MOF(Cu) · Figure 5 |
| Cu3(HHTP)2Browse family: Cu₃(HHTP)₂ / Cu–HHTP | Cu3(HHTP)2CuO4 units · 2,3,6,7,10,11-hexahydroxytriphenylene (HHTP) | 2D · PristineRepresentative planarly extended 2D conductive MOF used as the comparison catalyst and DFT comparator. | 4 · The e-CO2RR Performance of 2D-vc-MOF(Cu) · Figure 4; Figures S36-S38 |
| monolayer Cu3(HHTP)2 DFT modelBrowse family: Cu₃(HHTP)₂ / Cu–HHTP | model of Cu3(HHTP)2CuO4 model sites · HHTP-derived framework model | 2D · Model SystemPlanarly extended 2D-c-MOF monolayer slab comparator for CO2RR DFT. | 4-5 · The e-CO2RR Mechanism of 2D-vc-MOF(Cu) · Figure 5; Figure S38 |
Sample form, processing state and composition status define the context for measurements.
| Sample | Form and role | Processing and geometry | Source |
|---|---|---|---|
| 2D-vc-MOF(Cu) activated for gas adsorptionresearch_0740__mat__mat_2d_vc_mof_cu | Powder · Target Sample · Pristine Framework | Immersed in anhydrous acetone for 2 days with solvent exchange, dried at 60 deg C under vacuum for 12 h, then evacuated at 25 deg C for 12 h. | 4 · 2.2 The measurement of N2 and CO2 adsorption isotherms |
| 2D-vc-MOF(Cu) glassy carbon working electroderesearch_0740__mat__mat_2d_vc_mof_cu | Electrode · Target Sample · Composite | Catalyst/Nafion/isopropanol/water ink drop-cast on GC disk.5 mm diameter glassy carbon disk | 4 · 2.4 The electrochemical reduction of CO2 |
| 2D-vc-MOF(Cu) monolayer DFT slabresearch_0740__mat__mat_2d_vc_mof_cu_model | Model · Model System · Model | VASP/PBE-D3 computational model.monolayer with vacuum slab in c direction | 4 · 2.5 Computational details · Figure 5 |
| exfoliated 2D-vc-MOF(Cu) nanosheetsresearch_0740__mat__mat_2d_vc_mof_cu | Nanosheet · Target Sample · Pristine Framework | Exfoliated by simple dry grinding; dispersible in ethanol with a Tyndall effect.mean thickness about 7 nm; about 10 layers | 3 · The Synthesis and Characterization of 2D-vc-MOF(Cu) · Figures S17-S22; Tables S6-S7 |
| 2D-vc-MOF(Cu) pressed pelletsresearch_0740__mat__mat_2d_vc_mof_cu | Pellet · Target Sample · Pristine Framework | 40 mg powder pressed in a 10 mm die at 2-20 MPa for 30 s before four-point probe conductivity measurement. | 4 · 2.3 The measurement of electrical conductivity · Figure S25 |
| 2D-vc-MOF(Cu) blue-black powderresearch_0740__mat__mat_2d_vc_mof_cu | Powder · Target Sample · Pristine Framework | Solvothermal/isothermal oven product, filtered, washed with water and acetone, dried under vacuum. | 3 · 2.1.6 The optimal synthetical procedure |
| Cu3(HHTP)2 comparison electroderesearch_0740__mat__mat_cu3_hhtp2 | Electrode · Pristine Control · Composite | Cu3(HHTP)2 measured under the same CO2RR electrode conditions as 2D-vc-MOF(Cu).glassy carbon disk | 4 · The e-CO2RR Performance of 2D-vc-MOF(Cu) · Figure 4; Figures S36-S37 |
| Cu3(HHTP)2 monolayer DFT slabresearch_0740__mat__mat_cu3_hhtp2_model | Model · Model System · Model | VASP/PBE-D3 computational model.monolayer with vacuum slab in c direction | 4-5 · The e-CO2RR Mechanism of 2D-vc-MOF(Cu) · Figure 5; Figure S38 |