Modulating Host–Guest Interactions in Isoreticular Fe(III)-Doped Co-MOF Precatalysts for Electrocatalytic Oxygen Evolution

Inorganic Chemistry, Год журнала: 2025, Номер unknown

Опубликована: Апрель 8, 2025

The pursuit of sustainable energy solutions to address environmental challenges and crises has driven significant interest in electrocatalytic water splitting. However, the efficiency this process is hindered by sluggish kinetics anodic oxygen evolution reaction (OER). To overcome this, we synthesized two isoreticular cobalt-based metal-organic frameworks (MOFs), MOF-74 MOF-274, with different pore sizes (16.50 23.37 Å, respectively), where exhibited stronger Fe(III) adsorption as a result its confined nanosized channels. Electrochemical activation transformed these Co-MOF precatalysts into Fe-doped CoOOH nanosheets uniform elemental distribution, enhancing their OER performance. It revealed strengthened Co-O-Fe electronic interactions MOF-74-Fe X-ray photoelectron spectroscopy analysis, MOF-74-Fe-OER achieved decent activity show lower overpotential 288 mV at 10 mA cm-2 compared MOF-274-Fe-OER (357 mV). Furthermore, long-term stability tests confirmed robust durability, retaining 96.9% initial performance over h. These results underscore critical role pore-engineered MOF optimizing modulation catalytic for oxidation.

Язык: Английский

---

Ultra-stable seawater oxidation at 1.5 A cm−2 enabled by heptafluorotantalate intercalated NiFe layered double hydroxide

Journal of Colloid and Interface Science, Год журнала: 2025, Номер unknown, С. 137671 - 137671

Опубликована: Апрель 1, 2025

Язык: Английский

---

Real‐Time Monitoring of Fe‐Induced Stable γ‐NiOOH in Binder‐Free FeNi MOF Electrocatalysts for Enhanced Oxygen Evolution

Small, Год журнала: 2025, Номер unknown

Опубликована: Апрель 24, 2025

Abstract Hydrogen energy is a promising renewable source, and metal‐organic frameworks (MOFs) are considered potential electrocatalysts for water electrolysis due to their abundant active sites, high porosity, large surface area. The synthesis of bimetallic iron‐nickel‐benzene‐1,3,5‐tricarboxylate/nickel foam (FeNi‐BTC/NF) MOF reported using binder‐free one‐pot method by immersing nickel (NF) into solution benzene‐1,3,5‐tricarboxylic acid (BTC), N,N‐dimethylformamide (DMF), iron (Fe) salts. FeNi‐BTC/NF exhibits low overpotential 276 mV at 100 mA cm − 2 , Tafel slope 94 dec −1 stability exceeding 120 h. Fe‐Ni interaction facilitates the formation stable gamma‐nickel oxyhydroxide (γ‐NiOOH) phase, preventing its reversion hydroxyide (Ni(OH)₂), which crucial improving oxygen evolution reaction (OER) performance. This phase transition, revealed via in situ Raman spectroelectrochemical analysis, enhances electrocatalytic activity. Additionally, high‐valent Fe modulates electronic structure Ni, enabling transform γ‐NiOOH higher potentials, with synergistically boosting OER efficiency. findings offer insights Fe/Ni atom interactions transformations MOFs enhanced splitting.

Язык: Английский

---

In-situ growth of CuCoZn metallic inclusions via surface alloying for enhanced water oxidation at amperometric current densities

Fuel, Год журнала: 2025, Номер 397, С. 135487 - 135487

Опубликована: Апрель 25, 2025

Язык: Английский

---

NiFe pyrophosphate enables long-term alkaline seawater oxidation at an ampere-level current density

Materials Today Physics, Год журнала: 2024, Номер 49, С. 101592 - 101592

Опубликована: Ноя. 13, 2024

Язык: Английский

---