Muthurasu A., Sampath P., Ko T.H. et al. · Applied Catalysis B: Environmental · 2023 · 122523
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.
Se-doped MOF CoS2 hollow spheres outperform undoped MOF-derived controls for bifunctional OER/ORR activity and deliver improved rechargeable zinc-air battery performance.
Caveat: Most electrochemical comparisons are in application catalyst configurations; intrinsic conductivity is not independently isolated.
7-11 (render p007-p011) · 3.2; 3.3; 3.5; Conclusions · Fig. 5; Fig. 6; Fig. 8 · Linked to 5 structured results
The mesoporous hollow structure increases exposed active area and mass/charge transport channels, improving OER, ORR and Zn-air performance.
Caveat: Causal assignment is inferred by authors from morphology, porosity and electrochemical metrics rather than isolated transport measurements.
2, 6 and 11 (render p002, p006 and p011) · Introduction; 3.1; Conclusions · Fig. 2; Fig. 3; Fig. S6 referenced · Linked to 5 structured results
Se doping modifies the electronic structure of CoS2, forms Co-Se bonding, and improves electron transport/charge-transfer during catalysis.
Caveat: Electrical conductivity is not directly measured; support comes from XPS shifts, EIS Rct, and DFT energetics.
2 and 7 (render p002 and p007) · Introduction; 3.2 · Fig. 4; Fig. 5D · Linked to 4 structured results
The combination of methanol solvent and sulfate coordination enables template-free formation of hollow ZIF-67/MOF-Co spheres through promoted nucleation and inside-out Ostwald ripening.
Caveat: Mechanistic explanation is literature-supported and inferred; SI precursor figure captions are present but the supplied SI has no rendered figure panels.
4 and 11 (render p004 and p011) · 3.1; Conclusions · Fig. 1; Fig. S1 referenced · Linked to 1 structured result
DFT calculations indicate that Se doping lowers the OER energy barrier by reducing DeltaGn* at Co sites and preserving favourable electronic DOS features.
Caveat: Supporting Tables S2-S4 are captioned in the supplied SI text but their cell values are not exposed; DFT equations are available in text.
15-16 (render p015-p016) · Supporting Information DFT tables · Table S2; Table 4 · Linked to 8 structured results
During OER stability testing, Se-doped MOF CoS2 forms metal oxyhydroxide/oxide surface species while retaining hollow morphology, which the authors identify as a key factor in enhanced OER activity.
Caveat: Post-OER data are mostly in SI figures S11-S14; the supplied SI text has captions but no rendered figure panels, so the main text carries the interpretation.
8-9 (render p008-p009) · 3.4 · Fig. S11-S14 referenced · Linked to 3 structured results
Names and aliases are kept exactly within the paper’s own identity model.
| Material | Composition | Structure context | Source |
|---|---|---|---|
| Pt/C + IrO2 benchmark catalyst mixture | Pt/C and IrO2Pt and Ir benchmark catalysts | unknown · CompositeCommercial benchmark catalysts used for ORR/OER and Zn-air comparison. | 3 and 10 (render p003 and p010) · 2.5 Electrochemical measurements; 2.6 Aqueous Zn-air batteries · Fig. 8 |
| MOF CoS2 hollow spheres | CoS2 with residual MOF-derived C/N/O speciesCo in pyrite-type cobalt disulfide derived from Co-ZIF · 2-methylimidazole-derived carbon/nitrogen residue | 3D · DerivedMOF-derived pyrite CoS2 hollow spheres, JCPDS 41-1471, generated by sulfuration of hollow ZIF-67 spheres. | 2 and 5 (render p002 and p005) · 2.3 Synthesis of MOF CoS2 hollow spheres; 3.1 · Fig. 4A |
| MOF CoSe hollow spheres | CoSe with MOF-derived residueCo in cobalt selenide derived from Co-ZIF · 2-methylimidazole-derived carbon/nitrogen residue | 3D · DerivedMOF-derived CoSe hollow spheres with reported XRD peaks indexed to CoSe JCPDS 00-053-0449. | 4 and 6 (render p004 and p006) · 3.1 Synthesis, morphological and structural characterizations · Fig. S3 and Fig. S4a referenced |
| Se-doped MOF CoS2 hollow spheres | Se-doped CoS2 / N-doped graphitic carbon matrixCo in CoS2 with Se dopant/replacement sites · 2-methylimidazole-derived N-doped graphitic carbon matrix | 3D · CompositeMesoporous hollow Se-doped MOF-derived CoS2 spheres; CoS2 pyrite diffraction retained with small peak shifts after Se doping. | 1-2 and 4-6 (render p001-p006) · Abstract; 2.4 Synthesis; 3.1 · Fig. 2; Fig. 3; Fig. 4 |
| hollow ZIF-67 / MOF Co hollow spheres precursorBrowse family: ZIF-67 / Co(mIm)₂ | Co-based zeolitic imidazolate framework from CoSO4 and 2-methylimidazoleCo2+ · 2-methylimidazole (2-MIM) | 3D · PristineSpherical hollow ZIF-67/MOF-Co precursor, template-free, ca. 500-600 nm diameter. | 2 and 4 (render p002 and p004) · 2.2 Synthesis of ZIF-67 hollow spheres; 3.1 Synthesis, morphological and structural characterizations · Fig. 1; Fig. S1 referenced |
Sample form, processing state and composition status define the context for measurements.
| Sample | Form and role | Processing and geometry | Source |
|---|---|---|---|
| DFT pure CoS2 modelresearch_0276__mat__mat_mof_cos2_hs | Model · Model System · Model | Computational slab/model based on XRD data. | 9 (render p009) · 3.4 DFT and catalytic mechanism · Fig. 7A,C |
| MOF Co hollow spheresresearch_0276__mat__mat_zif67_mof_co_hs | Powder · Pristine Control · Pristine Framework | Hollow Co-MOF precursor/control used in microscopy and electrocatalysis comparisons. | 4 and 7 (render p004 and p007) · 3.1; 3.2 · Fig. S1 referenced; Fig. 5 |
| MOF CoS2 hollow spheres on carbon clothresearch_0276__mat__mat_mof_cos2_hs | Electrode · Pristine Control · Composite | Catalyst ink electrode prepared under same OER protocol as Se-doped target.carbon cloth | 3 and 7 (render p003 and p007) · 2.5; 3.2 · Fig. 5 |
| MOF CoS2 hollow spheresresearch_0276__mat__mat_mof_cos2_hs | Powder · Pristine Control · Derived Carbon | Hollow ZIF-67 spheres sulfurated with S powder under inert atmosphere at 500 degC for 3 h. | 2 and 7-8 (render p002, p007-p008) · 2.3; 3.2; 3.3 · Fig. 5; Fig. 6 |
| MOF CoSe hollow spheres on carbon clothresearch_0276__mat__mat_mof_cose_hs | Electrode · Pristine Control · Composite | Catalyst ink electrode prepared under same OER protocol as Se-doped target.carbon cloth | 3 and 7 (render p003 and p007) · 2.5; 3.2 · Fig. 5 |
| MOF CoSe hollow spheresresearch_0276__mat__mat_mof_cose_hs | Powder · Pristine Control · Derived Carbon | Hollow ZIF-67-derived comparison material formed by reaction with pure Se; full recipe is not in the main experimental section. | 4 and 7-8 (render p004, p007-p008) · 3.1; 3.2; 3.3 · Fig. S3 referenced; Fig. 5; Fig. 6 |
| Zn-air battery with Pt/C + IrO2 benchmark air cathoderesearch_0276__mat__mat_benchmark_ptc_iro2 | Electrode · Pristine Control · Composite | Comparison ZnAB constructed using same protocol and a 1:1 mixture of IrO2 and Pt/C catalysts.air cathode; Zn foil anode · Zn foil 0.25 mm thick | 3 and 10 (render p003 and p010) · 2.6; 3.5 · Fig. 8 |
| DFT Se-doped CoS2 modelresearch_0276__mat__mat_se_mof_cos2_hs | Model · Model System · Model | Computational Se-doped CoS2 (200) model with reported 2% Se doping content. | 9 (render p009) · 3.4 DFT and catalytic mechanism · Fig. 7B,D-F |
| Se-doped MOF CoS2 hollow spheres on carbon clothresearch_0276__mat__mat_se_mof_cos2_hs | Electrode · Target Sample · Composite | Catalyst ink drop-cast on carbon cloth and dried at 60 degC; catalyst loading estimated 0.5 mg cm-2.carbon cloth, 1.0 cm x 1.0 cm | 3 (render p003) · 2.5 Electrochemical measurements |
| Se-doped MOF CoS2 hollow spheresresearch_0276__mat__mat_se_mof_cos2_hs | Powder · Target Sample · Doped | Hollow ZIF-67 spheres sulfurated/selenylated with S/Se powder mixture under inert atmosphere at 500 degC for 3 h. | 2, 4 and 6 (render p002, p004 and p006) · 2.4; 3.1 · Fig. 2; Fig. 3; Fig. 4 |
| Se-doped MOF CoS2 hollow spheres on RDEresearch_0276__mat__mat_se_mof_cos2_hs | Electrode · Target Sample · Composite | 2.5 mg catalyst with Nafion in isopropyl alcohol/DI water ink; ca. 30 uL drop-coated on RDE.rotating disk electrode, 5.0 mm diameter, 0.19625 cm2 | 3 (render p003) · 2.5.1 For ORR measurements |
| hollow ZIF-67 spheresresearch_0276__mat__mat_zif67_mof_co_hs | Powder · Pristine Control · Pristine Framework | Purple precipitated hollow ZIF-67 spheres washed with methanol and water, dried overnight at 60 degC. | 2 (render p002) · 2.2 Synthesis of ZIF-67 hollow spheres |
| Zn-air battery with Se-doped MOF CoS2 hollow spheres air cathoderesearch_0276__mat__mat_se_mof_cos2_hs | Electrode · Target Sample · Composite | Homemade liquid Zn-air battery using Se-doped MOF CoS2 loaded in carbon cloth and 6.0 M KOH/0.2 M zinc acetate electrolyte.carbon cloth air cathode; Zn foil anode · Zn foil 0.25 mm thick | 3 and 10 (render p003 and p010) · 2.6 Aqueous Zn-air batteries; 3.5 · Fig. 8 |