Compositional engineering of HKUST‐1/sulfidized NiMn‐LDH on functionalized MWCNTs as remarkable bifunctional electrocatalysts for water splitting

Carbon Energy, Год журнала: 2023, Номер 5(12)

Опубликована: Дек. 1, 2023

Abstract Water‐splitting reactions such as the hydrogen evolution reaction (HER) and oxygen (OER) typically require expensive noble metal‐based electrocatalysts. This has motivated researchers to develop novel, cost‐effective electrocatalytic systems. In this study, a new multicomponent nanocomposite was assembled by combining functionalized multiwalled carbon nanotubes, Cu‐based metal–organic framework (MOF) (HKUST‐1 or HK), sulfidized NiMn‐layered double hydroxide (NiMn‐S). The resulting nanocomposite, abbreviated MW/HK/NiMn‐S, features unique architecture, high porosity, numerous electroactive Cu/Ni/Mn sites, fast charge transfer, excellent structural stability, conductivity. At current density of 10 mA cm −2 , dual‐function electrocatalyst shows remarkable performance, with ultralow overpotential values 163 mV 73 (HER), well low Tafel slopes (57 75 dec −1 respectively). Additionally, its turnover frequency (4.43 s for OER; 3.96 HER) are significantly superior those standard Pt/C IrO 2 synergistic effect nanocomposite's different components is responsible enhanced performance. A functional theory study revealed that multi‐interface heterostructure contribute increased electrical conductivity decreased energy barrier, in HER/OER activity. presents novel vision designing advanced electrocatalysts performance water splitting. Various composites have been utilized water‐splitting applications. investigates use MW/HK/NiMn‐S splitting first time indicate between carbon‐based materials along layered compounds porous MOF. each component composite can be an interesting topic field

Язык: Английский

---

Exploring Ir-doped NiFe-LDH nanosheets via a pulsed laser for oxygen evolution kinetics: in situ Raman and DFT insights

Journal of Materials Chemistry A, Год журнала: 2024, Номер 12(15), С. 8694 - 8706

Опубликована: Янв. 1, 2024

Herein, we present Ir-doped NiFe-LDH nanosheets synthesized via a pulsed laser irradiation strategy, showing superior electrocatalytic OER kinetics. We investigate the origin of activity in NiFeIr-LDH through situ / operando Raman and DFT studies.

Язык: Английский

---

Introducing phosphorus into spinel nickel ferrite to enhance lattice oxygen participation towards water oxidation electrocatalysis

Applied Catalysis B Environment and Energy, Год журнала: 2024, Номер 355, С. 124116 - 124116

Опубликована: Апрель 23, 2024

Язык: Английский

---

Two-dimensional bifunctional electrocatalyst (Mo–NiFe-LDH) with multilevel structure for highly efficient overall water splitting

Rare Metals, Год журнала: 2024, Номер 43(6), С. 2613 - 2622

Опубликована: Март 13, 2024

Язык: Английский

---

Emerging 3D nanomaterials as electrocatalysts for water splitting reactions

International Journal of Hydrogen Energy, Год журнала: 2024, Номер 74, С. 214 - 231

Опубликована: Июнь 14, 2024

Язык: Английский

---

High negative voltage activating perovskite oxide with bi-vacancy synergistic regulation for water oxidation

Chemical Engineering Journal, Год журнала: 2023, Номер 478, С. 147415 - 147415

Опубликована: Ноя. 17, 2023

Язык: Английский

---

S, Fe dual doped and precisely regulated CoP porous nanoneedle arrays for efficient hydrogen evolution at 3 A cm-2

Chemical Engineering Journal, Год журнала: 2023, Номер 470, С. 144081 - 144081

Опубликована: Июнь 11, 2023

Язык: Английский

---

Activated M,S co-doping (M = Ni, Co, Mn) inverse spinel oxides with mixed mechanisms for water oxidation

Applied Catalysis B Environment and Energy, Год журнала: 2023, Номер 343, С. 123567 - 123567

Опубликована: Ноя. 28, 2023

Язык: Английский

---

Manganese doped hollow cobalt oxide catalysts for highly efficient oxygen evolution in wide pH range

Chemical Engineering Journal, Год журнала: 2024, Номер 482, С. 148926 - 148926

Опубликована: Янв. 23, 2024

Язык: Английский

---

A Self-Supporting Electrode Material (NiS/NF) as a Stable and Efficient Electrocatalyst for Oxygen Evolution: In Situ Surface Activation of Nickel Sulfide to Nickel Oxide/(Oxy)hydroxide

Energy & Fuels, Год журнала: 2024, Номер 38(2), С. 1364 - 1372

Опубликована: Янв. 4, 2024

Binder-free nickel sulfide material grown on NF (NiS/NF) by a basic thermal sulfur growth mechanic was employed as both the electrode and substrate for water oxidation in 1.0 M KOH. In NiS/NF, found to be an activator transform oxide/(oxy)hydroxide. A transmission electron microscopy image of NiS/NF inferred that oxide/(oxy)hydroxyl layer amorphous nature. The energized electrocatalyst showed superior activity oxygen evolution (OER) at KOH with minimum overpotential (η) 290 mV @ 10 mA cm−2. Moreover, water-splitting device fabricated using photovoltaic solar panel split 1.54 V. Our observation could offer important insight into metal-chalcogenide (M-S) electrocatalysts low-cost evolution.

Язык: Английский

---