Xuan C., Xia K., Lei W. et al. · Electrochimica Acta · 2018 · 64-72
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Paraphrased for this database from the authors’ stated interpretations — never quoted verbatim — and kept separate from reported measurements.
Combining Ni-Fe-Se1:1-180 with N,S-CNT improves Zn-air battery power density and cycling stability compared with Pt/C+Ir/C benchmark behaviour.
Caveat: The N,S-CNT component is from previous work, not synthesised first-hand here; composite ratio is not specified in the main text.
p008 · Results and discussion · Fig. 6 · Linked to 4 structured results
The assigned office SI text file was empty, but the rendered SI surrogate supplied captions, tables, and page images sufficient for extraction; SI-only plot numbers remain visual estimates unless reported in text/tables.
Caveat: Visual estimates from small rendered plots have limited precision.
S-7 · Supporting Information · Figures S9-S10 · Linked to 4 structured results
Selenization of the NiFe-PBA precursor to mixed NiSe2/NiFe2Se4 lowers OER overpotential and charge-transfer resistance relative to the oxide and PBA controls.
Caveat: Numeric EIS resistance values are not reported in the main text; supplied SI text has the Fig. S7 caption but no readable Nyquist plot values.
p008 · Conclusions · Linked to 5 structured results
The optimal Ni-Fe-Se sample was obtained at 180 °C with a NiFe-PBA:Se mass ratio of 1:1 because lower temperatures or non-1:1 ratios left residual precursor or produced less favourable phases.
Caveat: Detailed XRD/FTIR/LSV plots for variants are in SI; supplied SI text provides captions but not readable plot-axis values, while main text provides qualitative summaries and the 200 C overpotentials.
p005 · Results and discussion · Fig. S9/S10 (SI cited) · Linked to 7 structured results
During OER, Ni-Fe-Se1:1-180 forms an in-situ oxy/hydroxide surface while retaining the bulk selenide phase, enabling electronic transfer from the conductive selenide core to active oxy/hydroxide sites.
Caveat: Post-OER XRD/XPS figures are SI-only; supplied SI text confirms captions but no SI figure rendering was available, so the claim relies mainly on main-text summary.
p006 · Results and discussion · Fig. S11/S12 (SI cited) · Linked to 3 structured results
Names and aliases are kept exactly within the paper’s own identity model.
| Material | Composition | Structure context | Source |
|---|---|---|---|
| Ni-Fe-O control oxide | NiFe2O4Ni and Fe · none; derived from NiFe-PBA precursor without Se powder | unknown · DerivedNiFe2O4, JCPDS 74-2081. | p004 · Results and discussion · Fig. 2b |
| nickel iron Prussian blue analogue (NiFe-PBA) | Ni3[Fe(CN)6]2·10H2O (reported phase assignment)Ni and Fe · cyanide / ferricyanide framework | 3D · PristineFace-centred cubic Prussian blue analogue, JCPDS 46-0906; nanocube morphology. | p003 · Results and discussion · Fig. 2a |
| NiFe-based selenide (Ni-Fe-Se) | mixed NiSe2 and NiFe2Se4Ni and Fe · none; derived from NiFe-PBA precursor | unknown · DerivedMixed crystalline phases: NiSe2 major phase and smaller NiFe2Se4 fraction for Ni-Fe-Se1:1-180. | p003 · Results and discussion · Fig. 2b |
| Ni-Fe-Se1:1-180 + N,S-CNT air-electrode composite | Ni-Fe-Se1:1-180 + nitrogen/sulfur co-doped carbon nanotubesNi and Fe in selenide component · none | unknown · CompositeComposite air cathode prepared by mixing Ni-Fe-Se1:1-180 with previously reported N,S-CNT ORR catalyst. | p007 · Results and discussion · Fig. 6 |
| Ir/C and Pt/C+Ir/C benchmark catalysts | Ir/C; Pt/C + Ir/CIr; Pt · none | unknown · CompositeCommercial/benchmark carbon-supported noble-metal catalysts used for comparison. | p005 · Results and discussion · Fig. 5 |
Sample form, processing state and composition status define the context for measurements.
| Sample | Form and role | Processing and geometry | Source |
|---|---|---|---|
| Ir/C (20 wt% Ir)research_0233__mat__noble_metal_benchmarks | Electrode · Pristine Control · Composite | Benchmark catalyst ink loaded on GCE for OER comparison.glassy carbon electrode | p005 · Results and discussion · Fig. 5 |
| Ni-Fe-Oresearch_0233__mat__ni_fe_o | Powder · Pristine Control · Mixed Metal | Prepared by the same method as Ni-Fe-Se without adding Se powder. | p002 · Experimental methods, Synthesis of Ni-Fe-Se |
| NiFe-PBAresearch_0233__mat__ni_fe_pba | Powder · Pristine Control · Pristine Framework | Room-temperature coprecipitated nanocube precursor, washed and dried at 60 °C overnight. | p002 · Experimental methods, Synthesis of Ni-Fe-Se |
| Ni-Fe-Se1:1-140research_0233__mat__ni_fe_se | Powder · Target Sample · Mixed Metal | NiFe-PBA:Se mass ratio 1:1, hydrothermal temperature 140 °C; otherwise prepared by the Ni-Fe-Se route. | p004 · Results and discussion · Fig. S2a/S3a (SI cited) |
| Ni-Fe-Se1:1-160research_0233__mat__ni_fe_se | Powder · Target Sample · Mixed Metal | NiFe-PBA:Se mass ratio 1:1, hydrothermal temperature 160 °C; otherwise prepared by the Ni-Fe-Se route. | p004 · Results and discussion · Fig. S2a/S3a (SI cited) |
| Ni-Fe-Se1:1-180research_0233__mat__ni_fe_se | Powder · Target Sample · Mixed Metal | NiFe-PBA:Se mass ratio 1:1, hydrothermal treatment at 180 °C, dried, then annealed at 300 °C under N2. | p002 · Experimental methods, Synthesis of Ni-Fe-Se |
| Ni-Fe-Se1:1-200research_0233__mat__ni_fe_se | Powder · Target Sample · Mixed Metal | NiFe-PBA:Se mass ratio 1:1, hydrothermal temperature 200 °C; otherwise prepared by the Ni-Fe-Se route. | p005 · Results and discussion · Fig. S9 (SI cited) |
| Ni-Fe-Se1:3-180research_0233__mat__ni_fe_se | Powder · Target Sample · Mixed Metal | NiFe-PBA:Se mass ratio 1:3, hydrothermal temperature 180 °C; otherwise prepared by the Ni-Fe-Se route. | p004 · Results and discussion · Fig. S2b/S3b (SI cited) |
| Ni-Fe-Se3:1-180research_0233__mat__ni_fe_se | Powder · Target Sample · Mixed Metal | NiFe-PBA:Se mass ratio 3:1, hydrothermal temperature 180 °C; otherwise prepared by the Ni-Fe-Se route. | p004 · Results and discussion · Fig. S2b/S3b (SI cited) |
| Ni-Fe-Se1:1-180 + N,S-CNT air electroderesearch_0233__mat__ni_fe_se_ns_cnt_composite | Electrode · Composite Sample · Composite | Mixture loaded onto prepared gas-diffusion layer for Zn-air battery air cathode.gas diffusion layer | p007 · Results and discussion · Fig. 6 |
| Pt/C+Ir/C air electroderesearch_0233__mat__noble_metal_benchmarks | Electrode · Pristine Control · Composite | Benchmark noble-metal catalyst air electrode for Zn-air battery comparison.gas diffusion layer | p008 · Results and discussion · Fig. 6 |