Xiong W., Li H., You H. et al. · National Science Review · 2020 · 609-619
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.
ZIF@HMCS-25% is an efficient bifunctional ORR/OER catalyst and supports rechargeable Zn-air battery operation.
Caveat: Battery data are application-level and do not isolate intrinsic transport properties.
616 · Conclusion · Linked to 4 structured results
During OER durability testing, ZIF-67 in ZIF@HMCS-25% converts to amorphous Co(OH)2 loaded on HMCS, so OER activity is not solely from the pristine framework state.
Caveat: Post-test conclusion is based on SI PXRD/XPS/TEM discussed in main text; SI figure images were unavailable in the supplied text layer.
615 · Results and discussion · Fig. S7 · Linked to 1 structured result
The high ORR activity is attributed to synergistic Co-Nx sites in ZIF-67 and N-doped HMCS.
Caveat: Mechanistic assignment is inferred from XPS deconvolution and electrochemical trends, not direct operando identification.
614 · Results and discussion · Linked to 4 structured results
HMCS spatial confinement reduces ZIF-67 particle size and shortens ion diffusion paths.
Caveat: Particle size values are approximate microscopy-derived values quoted in the main text.
610 · Introduction · Linked to 3 structured results
Introducing HMCS greatly improves charge transfer relative to pristine ZIF-67, as reflected by lower EIS Rct.
Caveat: EIS Rct is an electrochemical charge-transfer proxy, not a direct bulk electrical conductivity measurement.
615 · Results and discussion · Fig. 4d · Linked to 2 structured results
Names and aliases are kept exactly within the paper’s own identity model.
| Material | Composition | Structure context | Source |
|---|---|---|---|
| Commercial catalyst benchmarks | 20 wt% Pt/C; IrO2 bulkPt; Ir | unknown · UnknownCommercial ORR/OER benchmark catalysts | 613-614 · Results and discussion · Figs. 3-4 |
| Co-HMCS | Co-loaded N-doped carbonCo2+ captured by N-doped HMCS | 0D · CompositeControl sample prepared from HMCS and cobalt nitrate without 2-MI | 611 · Results and discussion · Fig. S2 |
| N-doped hollow mesoporous carbon sphere (HMCS) | N-doped carbon | 0D · DerivedHollow mesoporous carbon sphere made from silica/PDA templating and NaOH etching | 610 · Results and discussion · Scheme 1 |
| ZIF-67Browse family: ZIF-67 / Co(mIm)₂ | Co(2-methylimidazolate) frameworkCo2+ · 2-methylimidazole / 2-methylimidazolate | 3D · PristineZeolitic imidazolate framework ZIF-67 with Co-N4 structural motifs | 610 · Introduction |
| ZIF-67@HMCS yolk-shell hybridBrowse family: ZIF-67 / Co(mIm)₂ | ZIF-67@N-doped hollow mesoporous carbonCo2+ in ZIF-67 · 2-methylimidazolate | 3D · CompositeYolk-shell composite with ZIF-67 core/particles confined inside HMCS shell | 610 · Introduction |
Sample form, processing state and composition status define the context for measurements.
| Sample | Form and role | Processing and geometry | Source |
|---|---|---|---|
| Co-HMCSresearch_0265__mat__mat_co_hmcs | Powder · Pristine Control · Doped | HMCS treated with cobalt nitrate without 2-MI | 617 · Methods |
| HMCSresearch_0265__mat__mat_hmcs | Powder · Composite Component · Derived Carbon | Calcined at 800 C under N2 and NaOH etchedcarbon shell ~10 nm | 610 · Results and discussion · Fig. S1 |
| HMCS-1research_0265__mat__mat_hmcs | Powder · Composite Component · Derived Carbon | Prepared with higher dopamine concentrationcarbon shell ~30 nm | 612 · Results and discussion · Fig. S3 |
| IrO2 bulkresearch_0265__mat__mat_benchmarks | Powder · Pristine Control · Unknown | Commercial OER benchmark | 614 · Results and discussion · Fig. 4 |
| 20 wt% Pt/Cresearch_0265__mat__mat_benchmarks | Powder · Pristine Control · Composite | Commercial ORR benchmark | 613 · Results and discussion · Fig. 3 |
| pure ZIF-67research_0265__mat__mat_zif67 | Powder · Pristine Control · Pristine Framework | Synthesised without HMCS; large particles | 612 · Results and discussion · Fig. S1 |
| ZIF@BHMCS-25%research_0265__mat__mat_zif_hmcs | Powder · Composite Sample · Composite | Broken HMCS shell after prolonged ultrasonication | 612 · Results and discussion · Fig. S4b |
| ZIF@HMCS-1-25%research_0265__mat__mat_zif_hmcs | Powder · Composite Sample · Composite | Prepared with HMCS-1 dense-shell substrate | 612 · Results and discussion · Fig. S3 |
| ZIF@HMCS-10%research_0265__mat__mat_zif_hmcs | Powder · Composite Sample · Composite | Low HMCS feed ratio | 612 · Results and discussion · Fig. S1 |
| ZIF@HMCS-25%research_0265__mat__mat_zif_hmcs | Powder · Target Sample · Composite | Optimised yolk-shell composite; ZIF-67 confined near inner HMCS wall | 611 · Results and discussion · Fig. 1a-c |
| ZIF@HMCS-25% (150 C)research_0265__mat__mat_zif_hmcs | Powder · Composite Sample · Composite | Synthesised at 150 C | 612 · Results and discussion · Fig. S4a |
| ZIF@HMCS-25% Zn-air battery air cathoderesearch_0265__mat__mat_zif_hmcs | Electrode · Target Sample · Composite | Catalyst loaded at about 1 mg cm^-2 on carbon papercarbon paper with gas diffusion film | 618 · Zn-air battery performance tests |
| ZIF@HMCS-25% catalyst ink electroderesearch_0265__mat__mat_zif_hmcs | Electrode · Target Sample · Composite | Catalyst/Nafion/isopropanol ink drop-cast; loading about 0.253 mg cm^-2glassy carbon disk | 617 · Electrochemical experiments |
| ZIF@HMCS-50%research_0265__mat__mat_zif_hmcs | Powder · Composite Sample · Composite | High HMCS feed ratio | 612 · Results and discussion · Fig. S1 |
| ZIF/HMCS-25%research_0265__mat__mat_zif_hmcs | Powder · Composite Sample · Composite | Physical mixture of ZIF-67 and HMCS | 617 · Methods |
| ZIF@HMCS-m seriesresearch_0265__mat__mat_zif_hmcs | Powder · Target Sample · Composite | HMCS content varied; m = 10%, 25%, 50% | 611 · Results and discussion · Fig. 1 |