Yuan B., Li C., Liu Y. et al. · International Journal of Hydrogen Energy · 2019 · 11705-11716
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.
Ni NCs@MIL-53(NiFe) can directly serve as an OER electrocatalyst in 1.0 M KOH with lower overpotential and higher current density than Ni NCs and MIL-53(Fe) controls.
Caveat: Application result is OER electrocatalysis, not intrinsic electrical conductivity.
11714 · Conclusions · Linked to 7 structured results
Ni NCs@MIL-53(NiFe) shows robust OER durability under CV cycling and chronoamperometric testing in alkaline electrolyte.
Caveat: Retention is described qualitatively; exact retained current percentages are not stated.
11714 · Electrochemical property and characterization · Fig. 5e,f · Linked to 2 structured results
Exposed carboxyl groups in the MOF enhance hydrophilicity and OH- availability, supporting OER performance.
Caveat: Hydrophilicity is inferred from FT-IR/carboxylate assignment; no contact-angle measurement is reported.
11710 and 11714 · Morphology and structure characterization; Conclusions · Fig. 3a · Linked to 3 structured results
Blocky structures assembled from nanosheets expose more electroactive area and reaction sites, contributing to improved OER activity.
Caveat: ECSA control values for Ni NCs and MIL-53(Fe) are read from the figure rather than stated in the article text.
11711 and 11714 · Electrochemical property and characterization; Conclusions · Fig. 5c · Linked to 4 structured results
During solvothermal self-assembly, protons from Fe2+ hydrolysis consume/release Ni2+ from the Ni NC template; Fe2+ and Ni2+ then coordinate with terephthalic acid to form the bimetallic MOF.
Caveat: Mechanistic description is inferred by authors from synthesis conditions and characterisation; no in situ evidence reported.
11706 · Introduction · Scheme 1 · Linked to 2 structured results
Ni-Fe metal-metal coupling changes the electronic structure/coordination environment, giving a negative Ni 2p binding-energy shift and improved OER kinetics.
Caveat: No direct conductivity measurement is reported; transport enhancement is inferred from XPS shifts, Tafel/EIS and electrochemical performance.
11709 and 11714 · Morphology and structure characterization; Conclusions · Fig. S7 · Linked to 5 structured results
Names and aliases are kept exactly within the paper’s own identity model.
| Material | Composition | Structure context | Source |
|---|---|---|---|
| MIL-53(Fe) | MIL-53(Fe); exact formula not reportedFe centres · terephthalic acid / terephthalate | 3D · PristineFe-based MIL-53 MOF; XRD matched simulated/reported MIL-53(Fe) patterns. | 11708 · Morphology and structure characterization · Fig. S6 |
| Ni NCs | Ni nanocubes / nickel acetate hydroxide precursor; exact formula not reportedNi | 0D · PristineNanocubic Ni precursor; text reports XRD identification as tetragonal cobalt acetate hydroxide, likely source wording retained without correction. | 11708 · Morphology and structure characterization · Fig. 1a, Fig. S4 |
| Ni NCs@MIL-53(NiFe) | Ni nanocubes@MIL-53(NiFe); exact framework formula not reportedNi and Fe centres · terephthalic acid / terephthalate | 3D · CompositeBimetallic MIL-53(NiFe)-type MOF assembled on/self-templated from Ni nanocubes; XRD described as mixed crystalline MIL-53(NiFe) and tetragonal acetate hydroxide structure with MIL-53 C2/m reference. | 11706 · Introduction |
Sample form, processing state and composition status define the context for measurements.
| Sample | Form and role | Processing and geometry | Source |
|---|---|---|---|
| MIL-53(Fe)research_0713__mat__m_mil53_fe | Powder · Pristine Control · Pristine Framework | Solvothermal powder; electrode ink cast on glassy-carbon RDE for electrochemistry. | 11706 · Synthetic section |
| Ni NCsresearch_0713__mat__m_ni_ncs | Powder · Pristine Control · Unknown | Reflux-derived nanocubic precursor; electrode ink cast on glassy-carbon RDE for electrochemistry. | 11706 · Synthetic section |
| Ni NCs@MIL-53(NiFe), optimised Ni NCs:FeCl2 mass ratio 3research_0713__mat__m_ni_ncs_mil53_nife | Powder · Target Sample · Mixed Metal | Self-templated solvothermal powder; electrode ink cast on glassy-carbon RDE for electrochemistry. | 11708 · Morphology and structure characterization · Fig. S2, Fig. S3 |
| Ni NCs@MIL-53(NiFe) mass-ratio optimisation seriesresearch_0713__mat__m_ni_ncs_mil53_nife | Powder · Target Sample · Mixed Metal | Solvothermal products made at Ni NCs:FeCl2 mass ratios 0.5, 1, 2, 3 and 4. | 3/8 · Supporting Information · Fig. S2, Fig. S3 |