Hu L., Xiong T., Liu R. et al. · Chemistry - A European Journal · 2019 · 6575-6583
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 optimal Co3O4@CuCAT electrode outperforms pristine Co3O4 and CuCAT controls for both HER and OER and enables low-voltage overall water splitting.
Caveat: Performance is for alkaline 1 M KOH electrocatalysis on carbon cloth; no membrane electrolyser or scale-up data are reported.
p007 / journal p.6581 · Conclusions · Linked to 4 structured results
CuCAT/Cu3(HHTP)2 is selected as a conductive copper MOF co-catalyst because it has good electronic conductivity, electrolyte penetration, and charge transport.
Caveat: No direct DC conductivity value for CuCAT is measured in this paper; conductivity is cited from prior literature and inferred here through electrochemical impedance behaviour.
p002 / journal p.6576 · Introduction · Linked to 2 structured results
Excess CuCAT coating degrades HER and OER performance by limiting ionic transport/electrolyte penetration and reducing the ratio of active sites.
Caveat: Variant curves are shown graphically in Figure S23; exact per-variant onset/eta values are not tabulated.
p005 / journal p.6579 · Results · Figure S23 · Linked to 1 structured result
The target electrode is a Co3O4@CuCAT core-shell hybrid in which CuCAT coats Co3O4 nanowire arrays without destroying their morphology.
Caveat: The shell is described as amorphous/carbon-like after coating, so long-range CuCAT crystallinity in the shell is supported by phase-combination evidence rather than single-crystal structure.
p003 / journal p.6577 · Results · Figure 1 · Linked to 3 structured results
Electronic interactions between CuCAT and Co3O4 are assigned to Cu-O-Co bonding, facilitating charge transfer and water adsorption.
Caveat: Cu-O-Co bonding is inferred from XPS shifts, NBO charge redistribution and DFT models rather than a directly solved interfacial structure.
p005-p006 / journal pp.6579-6580 · Discussion · Figure 4 · Linked to 3 structured results
Oxygen vacancies and N doping in Co3O4@CuCAT are proposed to enhance electronic conductivity and charge-transfer capability, lowering Rct relative to Co3O4.
Caveat: Electrical conductivity is not directly quantified; the transport claim relies on EIS, spectroscopy, and catalytic kinetics.
p004 / journal p.6578 · Results · Figure S9 · Linked to 3 structured results
Names and aliases are kept exactly within the paper’s own identity model.
| Material | Composition | Structure context | Source |
|---|---|---|---|
| Bare carbon cloth | C | unknown · UnknownConductive carbon cloth substrate/control; SI Figure S2 reports XRD and SEM of CC. | p002 · Supporting Information · Figure S2 |
| Co3O4 nanowire arrays on carbon cloth | Co3O4Cobalt oxide spinel with Co2+/Co3+ centres | 1D · PristinePorous Co3O4 nanowire arrays supported on carbon cloth; PXRD peaks indexed to spinel Co3O4, space group Fd3m. | p002 / journal p.6576 · Results · Figure 1a,b |
| Co3O4@CuCAT core-shell nanowire hybridBrowse family: Cu₃(HHTP)₂ / Cu–HHTP | Co3O4@Cu3(HHTP)2Co3O4 core plus Cu sites in CuCAT-derived shell · HHTP-derived CuCAT shell; NMP-derived nitrogen incorporated after coating | 1D · CompositeCore-shell nanowire-array composite containing BCC substrate, Co3O4, and CuCAT phases; TEM/HRTEM show a CuCAT shell around Co3O4 and XPS/DFT support Cu-O-Co interactions. | p002-p003 / journal pp.6576-6577 · Results · Scheme 1; Figure 1 |
| CuCAT / Cu3(HHTP)2 conductive copper MOFBrowse family: Cu₃(HHTP)₂ / Cu–HHTP | Cu3(HHTP)2Open copper sites coordinated to deprotonated HHTP ligands · HHTP = hexahydroxytriphenylene | 2D · PristineTwo-dimensional hexagonal conductive MOF; PXRD shows successful CuCAT synthesis and retention after immersion in 1 M KOH for 3 days. | p002 / journal p.6576 · Introduction |
| Commercial Pt/C/CC and IrO2/CC reference electrodes | Pt/C on CC; IrO2 on CCPt or Ir oxide reference catalyst on carbon cloth | unknown · CompositeCommercial reference electrocatalysts loaded on carbon cloth for HER, OER, and two-electrode comparison. | p008 / journal p.6582 · Electrochemical measurements |
Sample form, processing state and composition status define the context for measurements.
| Sample | Form and role | Processing and geometry | Source |
|---|---|---|---|
| bare BCC / carbon cloth blankresearch_0369__mat__mat_bcc | Electrode · Pristine Control · Unknown | Bare carbon cloth used as HER/OER blank control.carbon cloth | p004-p005 / journal pp.6578-6579 · Results · Figures S12 and S16 |
| Co3O4 NWAs on carbon clothresearch_0369__mat__mat_co3o4 | Electrode · Pristine Control · Unknown | Co(OH)F NWAs grown hydrothermally on carbon cloth, washed/dried, then annealed at 400 deg C for 3 h in static air.activated carbon cloth, 3 x 4 cm2 | p007 / journal p.6581 · Fabrication of Co3O4 |
| Co3O4@CuCAT-1research_0369__mat__mat_co3o4_cucat | Electrode · Composite Sample · Composite | Prepared at 85 deg C with Co3O4/Cu(C5H4F3O2)2 weight ratio 8:1.Co3O4 nanowire arrays on carbon cloth | p007 / journal p.6581 · Fabrication of Co3O4@CuCAT |
| Co3O4@CuCAT-2research_0369__mat__mat_co3o4_cucat | Electrode · Composite Sample · Composite | Prepared at 85 deg C with Co3O4/Cu(C5H4F3O2)2 weight ratio 4:1.Co3O4 nanowire arrays on carbon cloth | p005 / journal p.6579 · Results · Figure S23 |
| Co3O4@CuCAT-3research_0369__mat__mat_co3o4_cucat | Electrode · Composite Sample · Composite | Prepared at 85 deg C with Co3O4/Cu(C5H4F3O2)2 weight ratio 1:1.Co3O4 nanowire arrays on carbon cloth | p005 / journal p.6579 · Results · Figure S23 |
| Co3O4@CuCAT-4research_0369__mat__mat_co3o4_cucat | Electrode · Composite Sample · Composite | Prepared at 85 deg C with Co3O4/Cu(C5H4F3O2)2 weight ratio 1:2.Co3O4 nanowire arrays on carbon cloth | p007 / journal p.6581 · Fabrication of Co3O4@CuCAT |
| Co3O4@CuCAT optimal core-shell electroderesearch_0369__mat__mat_co3o4_cucat | Electrode · Target Sample · Composite | Co3O4/Cu(C5H4F3O2)2 weight ratio 2:1; solvothermal coating at 85 deg C for 12 h; washed with water and vacuum dried.Co3O4 nanowire arrays on carbon cloth, 3 x 4 cm2 during coating | p007 / journal p.6581 · Fabrication of Co3O4@CuCAT |
| CuCAT catalyst on carbon clothresearch_0369__mat__mat_cucat | Electrode · Pristine Control · Composite | Powder CuCAT catalyst dispersion cast onto CC and dried overnight.carbon cloth (CC), geometric area 1 x 1 cm2 | p007 / journal p.6581 · Fabrication of CuCAT |
| CuCAT powderresearch_0369__mat__mat_cucat | Powder · Pristine Control · Pristine Framework | Solvothermal product centrifuged and dried overnight. | p007 / journal p.6581 · Fabrication of CuCAT |
| IrO2/CC OER referenceresearch_0369__mat__mat_reference_electrodes | Electrode · Pristine Control · Composite | Commercial IrO2 dispersed in water/Nafion, transferred to CC, dried overnight.carbon cloth, geometric area 1 x 1 cm2 | p008 / journal p.6582 · Electrochemical measurements |
| Co3O4 DFT cluster modelresearch_0369__mat__mat_co3o4 | Model · Model System · Model | Optimised cluster model used for DFT/NBO/free-energy calculations. | p022 · Supporting Information · Figure S24 |
| Co3O4@CuCAT DFT cluster modelresearch_0369__mat__mat_co3o4_cucat | Model · Model System · Model | Optimised cluster model used for DFT/NBO/free-energy calculations. | p022 · Supporting Information · Figure S24 |
| CuCAT DFT cluster modelresearch_0369__mat__mat_cucat | Model · Model System · Model | Optimised cluster model used for DFT/NBO/free-energy calculations. | p022 · Supporting Information · Figure S24 |
| Pt/C/CC HER referenceresearch_0369__mat__mat_reference_electrodes | Electrode · Pristine Control · Composite | Commercial 20% Pt/C dispersed in water/Nafion, transferred to CC, dried overnight.carbon cloth, geometric area 1 x 1 cm2 | p008 / journal p.6582 · Electrochemical measurements |