Chen N., Che S., Yuan Y. et al. · Journal of Colloid and Interface Science · 2023 · 513-524
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.
The self-supporting Co/CoP/NC/CoF electrode enables high-current-density alkaline overall water splitting with superior or comparable performance to reported CoP-based electrocatalysts.
Caveat: Raw long-term industrial-scale data and gas purity are not provided; data availability statement says data used is confidential.
p009-p010 / journal pages 521-522 · 3.5 and Conclusion · Fig. 7; Fig. 8; Table S5 · Linked to 4 structured results
The paper discusses electron transport and charge-transfer impedance but does not report a direct electrical conductivity, mobility, Seebeck coefficient, or thermal conductivity measurement.
Caveat: Transport evidence is electrochemical impedance and inferred graphitic-carbon conduction.
p007-p008 / journal pages 519-520 · 3.2-3.3 · Fig. 4d; Fig. 5d · Linked to 2 structured results
The exogenous Co-ion route gives looser substrate contact and poorer catalytic stability than the endogenous in-situ route.
Caveat: Exfoliation is inferred from stability loss and morphology rather than directly quantified detached mass.
p003 and p007 / journal pages 515 and 519 · 3.1-3.2 · Figure S4; Fig. 4f; Fig. 5f · Linked to 4 structured results
In-situ transformation of cobalt foam to Co(OH)2 and then Co-MOF avoids exogenous metal ions and retains tight contact between MOF-derived catalyst and substrate.
Caveat: Direct interfacial contact is inferred from synthesis design, microscopy and impedance rather than a standalone contact-resistance measurement.
p002-p003 / journal pages 514-515 · Introduction and 3.1 · Fig. 1 · Linked to 2 structured results
A 6 h Co-MOF growth time and 550 C phosphating temperature are the optimised synthetic conditions for the final Co/CoP/NC/CoF catalyst.
Caveat: Optimisation is based on electrochemical and morphology screening under the authors' conditions only.
p003 / journal page 515 · 3.1 · Figure S2; Figure S3; Figure S9-S16 · Linked to 4 structured results
DFT calculations support a synergistic effect between CoP and N-doped carbon that optimises electron distribution and lowers HER/OER free-energy barriers.
Caveat: Computational model excludes part of the Co phase and simplifies the real heterogeneous electrode.
p008 / journal page 520 · 3.4 · Fig. 6c-d; Figure S17 · Linked to 4 structured results
The MOF-derived graphitic N-doped carbon backbone provides fast electron-transport pathways, exposes active sites, and reduces charge-transfer impedance.
Caveat: Electrical conductivity is argued from Raman graphitic carbon, electrochemical impedance, and performance; no four-probe conductivity value is reported.
p007 / journal page 519 · 3.2 · Fig. 4d; Figure S6 · Linked to 4 structured results
Names and aliases are kept exactly within the paper’s own identity model.
| Material | Composition | Structure context | Source |
|---|---|---|---|
| Co/CoP/NC nanosheets on cobalt foam | Co/CoP/NC/CoFCo and CoP nanoparticles derived from Co-MOF/CoF and cobalt foam · 2-MeIM-derived N-doped carbon after phosphating | 2D · DerivedHierarchical heterostructure nanosheets with Co/CoP nanoparticles embedded or wrapped in N-doped carbon on cobalt foam. | p003 / journal page 515 · 2.4 Synthesis of Co/CoP/NC/CoF · Fig. 1 |
| Co-MOF nanosheets on cobalt foam | Co-MOF/CoFCo2+ released from in-situ etched Co(OH)2 on cobalt foam · 2-methylimidazole (2-MeIM) | 2D · CompositeLarge angular Co-MOF nanosheets grown by in-situ ligand exchange and coordination on cobalt foam. | p003 / journal page 515 · 2.3 Synthesis of Co-MOF/CoF · Fig. 2b |
| cobalt foam | CoFmetallic cobalt foam · none | 3D · Pristine3D cobalt foam substrate and control electrode. | p002 / journal page 514 · Introduction |
| Co(OH)2 nanosheets on cobalt foam | Co(OH)2/CoFCo(OH)2 generated from cobalt foam · none | 2D · CompositeUniform Co(OH)2 nanoflake or nanosheet layer on a 3D cobalt foam skeleton. | p003 / journal page 515 · 2.2 In-situ etching growth · Fig. 2a |
| CoP nanosheets on cobalt foam | CoP/CoFCoP generated from Co(OH)2/CoF · none | 2D · DerivedCoP/CoF nanosheet control without MOF-derived carbon backbone. | p003 / journal page 515 · 2.6 Synthesis of CoP/CoF nanosheets |
| CoP/NC computational model | CoP/NC slab modelCoP (211) active surface · N-doped carbon model component | 2D · Model SystemDFT slab model representing the CoP/NC catalytic surface of Co/CoP/NC/CoF. | SI text · DFT Note · Figure S17 |
| exogenous-Co Co/CoP/NC nanosheets on cobalt foam | Exo-Co/CoP/NC/CoFCo from cobalt foam plus exogenous cobalt nitrate · 2-MeIM-derived N-doped carbon after phosphating | 2D · DerivedControl Co/CoP/NC electrode prepared with exogenous Co ions; reported to have looser substrate contact. | p003 / journal page 515 · 2.5 Synthesis of Exo-Co/CoP/NC/CoF · Figure S4 |
| exogenous-Co Co-MOF nanosheets on cobalt foam | Exo-Co-MOF/CoFCo2+ from cobalt nitrate hexahydrate plus cobalt foam · 2-methylimidazole (2-MeIM) | 2D · CompositeExogenously grown Co-MOF nanosheets on cobalt foam, reported as more sparsely packed than in-situ Co-MOF/CoF. | p003 / journal page 515 · 2.5 Synthesis of Exo-Co/CoP/NC/CoF · Figure S4 |
Sample form, processing state and composition status define the context for measurements.
| Sample | Form and role | Processing and geometry | Source |
|---|---|---|---|
| 0 h MOF growth / CoP-like controlresearch_0633__mat__mat_cop_cof | Electrode · Pristine Control · Derived Carbon | screening sample with 0 h MOF growth time before phosphatingcobalt foam | p010 · Synthetic condition optimisation · Figure S9; Figure S13 |
| Co/CoP/NC/CoF-12 hresearch_0633__mat__mat_co_coP_nc_cof | Electrode · Target Sample · Derived Carbon | 12 h Co-MOF growth, then phosphating at 550 Ccobalt foam | p003 / journal page 515 · 3.1 Fabrication and structure characterization · Figure S2 |
| Co/CoP/NC/CoF-1 hresearch_0633__mat__mat_co_coP_nc_cof | Electrode · Target Sample · Derived Carbon | 1 h Co-MOF growth, then phosphating at 550 Ccobalt foam | p010 · Synthetic condition optimisation · Figure S9 |
| Co/CoP/NC/CoF-350research_0633__mat__mat_co_coP_nc_cof | Electrode · Target Sample · Derived Carbon | 6 h Co-MOF growth; phosphated at 350 C for 2 h under Arcobalt foam | p011 · Synthetic condition optimisation · Figure S11 |
| Co/CoP/NC/CoF-3 hresearch_0633__mat__mat_co_coP_nc_cof | Electrode · Target Sample · Derived Carbon | 3 h Co-MOF growth, then phosphating at 550 Ccobalt foam | p010 · Synthetic condition optimisation · Figure S9 |
| Co/CoP/NC/CoF-450research_0633__mat__mat_co_coP_nc_cof | Electrode · Target Sample · Derived Carbon | 6 h Co-MOF growth; phosphated at 450 C for 2 h under Arcobalt foam | p011 · Synthetic condition optimisation · Figure S11 |
| Co/CoP/NC/CoF-550 / 6 hresearch_0633__mat__mat_co_coP_nc_cof | Electrode · Target Sample · Derived Carbon | 6 h Co-MOF growth; phosphated at 550 C for 2 h under 100 mL min^-1 Ar; directly used as self-supporting electrodecobalt foam · 0.5 cm x 1 cm pieces for electrochemistry | p003 / journal page 515 · 3.1 Fabrication and structure characterization · Fig. 2c; Figure S3 |
| Co/CoP/NC/CoF-650research_0633__mat__mat_co_coP_nc_cof | Electrode · Target Sample · Derived Carbon | 6 h Co-MOF growth; phosphated at 650 C for 2 h under Arcobalt foam | p003 / journal page 515 · 3.1 Fabrication and structure characterization · Figure S3 |
| Co-MOF/CoF, 6 h growthresearch_0633__mat__mat_co_mof_cof | Electrode · Composite Component · Composite | Co(OH)2/CoF immersed in 2 M 2-MeIM for 6 h; washed with ethanol and driedcobalt foam | p003 / journal page 515 · 3.1 Fabrication and structure characterization · Figure S2 |
| CoFresearch_0633__mat__mat_cof | Electrode · Pristine Control · Unknown | ultrasonically cleaned in ethanol, acetone, and hydrochloric acid before usecobalt foam · 2 cm x 4 cm before cutting | p003 / journal page 515 · 2.2 In-situ etching growth |
| Co(OH)2/CoFresearch_0633__mat__mat_cooh2_cof | Electrode · Pristine Control · Composite | CoF water-bath etched at 80 C for 3 h; washed with ethanol and air-driedcobalt foam | p003 / journal page 515 · 2.2 In-situ etching growth |
| CoP/CoFresearch_0633__mat__mat_cop_cof | Electrode · Pristine Control · Composite | Co(OH)2/CoF phosphated at 550 C for 2 h under Arcobalt foam | p003 / journal page 515 · 2.6 Synthesis of CoP/CoF nanosheets |
| CoP DFT modelresearch_0633__mat__mat_cop_nc_model | Model · Model System · Model | DFT slab model15 A vacuum; 3 x 3 x 1 supercell | SI text · DFT Note · Figure S17 |
| CoP/NC DFT modelresearch_0633__mat__mat_cop_nc_model | Model · Model System · Model | DFT slab model with N-doped carbon component15 A vacuum; 3 x 3 x 1 supercell | SI text · DFT Note · Figure S17 |
| Exo-Co/CoP/NC/CoFresearch_0633__mat__mat_exo_co_coP_nc_cof | Electrode · Pristine Control · Derived Carbon | Exo-Co-MOF/CoF phosphated at 550 C for 2 h under 100 mL min^-1 Arcobalt foam | p003 / journal page 515 · 2.5 Synthesis of Exo-Co/CoP/NC/CoF |
| Exo-Co-MOF/CoFresearch_0633__mat__mat_exo_co_mof_cof | Electrode · Composite Component · Composite | CoF immersed in 0.5 M Co(NO3)2 and 2 M 2-MeIM for 6 h at room temperature; washed with ethanol and driedcobalt foam | p003 / journal page 515 · 2.5 Synthesis of Exo-Co/CoP/NC/CoF |
| Co/CoP/NC/CoF||Co/CoP/NC/CoF electrolyzerresearch_0633__mat__mat_co_coP_nc_cof | Electrode · Composite Sample · Derived Carbon | same target electrode used as both anode and cathode in alkaline electrolyzercobalt foam | p008 / journal page 520 · 3.5 Evaluation of overall water splitting and applications · Fig. 7a |
| Pt/C/CoF benchmark cathoderesearch_0633__mat__mat_cof | Electrode · Pristine Control · Composite | commercial Pt/C processed as benchmark electrodecobalt foam | p003 / journal page 515 · 2.8 Electrochemical measurements |
| RuO2/CoF benchmark anoderesearch_0633__mat__mat_cof | Electrode · Pristine Control · Composite | commercial RuO2 processed as benchmark electrodecobalt foam | p003 / journal page 515 · 2.8 Electrochemical measurements |