Namvar S., Arzani M., Sarkar A.M. et al. · ACS Applied Materials and Interfaces · 2026 · 24433-24443
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 Co3(HITP)2 catalyst can be integrated into a Zn-NO3 battery cell with stable OCP, a maximum power density around 5.3 mW cm-2 and stable charge-discharge cycling.
Caveat: Battery evidence is from an H-type laboratory cell; no practical full-cell scale-up is reported.
p.24440 · Results and Discussion · Figure 6 · Linked to 4 structured results
Co3(HITP)2 delivers high nitrate-reduction current density and ammonia yield in alkaline nitrate electrolyte, with the best reported yield rate of 56.8 mg cm-2 h-1 at -0.8 V vs RHE.
Caveat: Application performance is measured on a drop-cast carbon-paper composite electrode, not on a free-standing pristine powder pellet.
p.24436 · Results and Discussion · Figure 2; Table S2 · Linked to 3 structured results
Control experiments with nitrate-free electrolyte, bare carbon paper and isotope-labelled nitrate support nitrate ions as the main ammonia source rather than carbon paper, contamination or catalyst nitrogen.
Caveat: The exact detection limits are not reported in the extracted text.
p.24437 · Results and Discussion · Figures 2E and 3A · Linked to 3 structured results
Co3(HITP)2 is presented as a 2D intrinsically conductive pi-d conjugated framework that embeds a high density of Co-N4 active sites directly within the extended conductive framework.
Caveat: This article does not report a direct solid-state conductivity value for the synthesised sample; it relies on prior Co3(HITP)2 conductivity literature and electrochemical charge-transfer evidence.
p.24435 · Introduction · Linked to 3 structured results
The low fitted charge-transfer resistance of Co3(HITP)2 relative to HITP and carbon paper is used to argue that cobalt incorporation enhances interfacial electron-transfer kinetics.
Caveat: EIS Rct is not equivalent to intrinsic bulk electrical conductivity.
p.24437 · Results and Discussion · Figure 3B · Linked to 3 structured results
The electrolyte-composition experiments support a specific OH- role in accelerating water dissociation and supplying adsorbed H* for nitrate hydrogenation, beyond simply increasing ionic conductivity.
Caveat: Higher KOH increases yield but lowers FE at high concentration because HER also increases.
p.24439-p.24440 · Results and Discussion · Figure 5; Figure S11 · Linked to 4 structured results
In situ ATR-SEIRAS is used to assign a sequential nitrate reduction pathway on Co3(HITP)2 involving nitrate consumption, nitro/nitrito intermediates, hydrogenated NHx species and ammonia formation.
Caveat: Some bands have multiple possible assignments, and the SI/main potential references differ.
p.24439 · Results and Discussion · Figure 4 · Linked to 6 structured results
Names and aliases are kept exactly within the paper’s own identity model.
| Material | Composition | Structure context | Source |
|---|---|---|---|
| Bare carbon paper control | Not specified | unknown · UnknownConductive carbon fibre paper substrate and bare-substrate control. | p.24436 · Results and Discussion |
| Co3(HITP)2 conductive two-dimensional pi-d conjugated metal-organic frameworkBrowse family: Co₃(HITP)₂ / Co–HITP | Co3(HITP)2Cobalt nodes coordinated by Co-N4 sites; XPS indicates mixed Co2+/Co3+ components. · HITP = 2,3,6,7,10,11-hexaiminotriphenylene, used as HITP.6HCl precursor. | 2D · PristineLayered Co-N4 coordinated pi-d conjugated framework; PXRD shows no sharp long-range diffraction peaks, interpreted as amorphous or nanocrystalline with small domains. | p.24433 · Abstract |
| HITP linker control | HITP2,3,6,7,10,11-hexaiminotriphenylene | 0D · UnknownFree organic linker control used for FT-IR, BET, EIS and double-layer capacitance comparisons. | p.24435 · Results and Discussion · Figure 1H-I |
Sample form, processing state and composition status define the context for measurements.
| Sample | Form and role | Processing and geometry | Source |
|---|---|---|---|
| Bare carbon paper electrode controlresearch_0533__mat__carbon_paper | Electrode · Pristine Control · Unknown | Bare carbon paper tested under similar nitrate-reduction conditions and in EIS comparison.Carbon paper | p.24437 · Results and Discussion · Figure 3A-B |
| Co3(HITP)2 drop-cast carbon paper electroderesearch_0533__mat__co3_hitp2 | Electrode · Composite Sample · Composite | 10-15 mg Co3(HITP)2 dispersed in 15 mL IPA, sonicated 30 min, and drop-cast to about 0.5 mg cm-2 mass loading on carbon paper.Carbon paper | p.24436 · Results and Discussion |
| Co3(HITP)2 powderresearch_0533__mat__co3_hitp2 | Powder · Target Sample · Pristine Framework | Black solid recovered by centrifugation, washed, and dried under vacuum at 60 degC overnight; SI schematic shows 24 h vacuum drying at 60 degC. | p.24435 · Experimental Section |
| Co3(HITP)2 film on SEIRAS-active Au@Si substrateresearch_0533__mat__co3_hitp2 | Thin Film · Target Sample · Composite | Co3(HITP)2 dispersed in isopropanol with 5 wt% Nafion, sonicated 1 h, dropped onto Au@Si in the Spectro cell, and dried at ambient temperature.Nanostructured Au film on Si(100) ATR FAC prism · Au film about 50 nm; Co3(HITP)2 catalyst loading 0.63 mg cm-2 | S8 · Catalyst Film Deposition |
| Zn-NO3 battery cell with Co3(HITP)2-coated carbon-paper cathoderesearch_0533__mat__co3_hitp2 | Unknown · Composite Sample · Composite | H-type cell with 10 mL catholyte (1 M KNO3 + 1 M KOH) and 10 mL anolyte (5 M KOH).Co3(HITP)2-coated carbon paper cathode; zinc plate anode; Nafion 115 membrane · Cathode 0.5 x 0.5 cm2; zinc plate 1 x 2 cm2 | S10 · Assembly of the zinc-nitrate battery |
| HITP linker controlresearch_0533__mat__hitp_ligand | Powder · Pristine Control · Unknown | Commercial/source HITP.6HCl linker or HITP reference used for FT-IR, BET, EIS and Cdl comparisons; preparation not separately reported. | S2 · Materials |