Regulating Intermediate Adsorption and Promoting Charge Transfer of CoCr‐LDHs by Ce Doping for Enhancing Electrooxidation of 5‐Hydroxymethylfurfural

Small, Год журнала: 2025, Номер unknown

Опубликована: Янв. 14, 2025

Abstract Electrochemical oxidation of 5‐hydroxymethylfurfural (HMFOR) to generate high‐value chemicals under mild conditions acts as an energy‐saving and sustainable strategy. However, it is still challenging develop electrocatalysts with high efficiency good durability. Here, nickel foam (NF) supported CoCrCe(7.5%)‐LDH (layered double hydroxides) by doping Ce into CoCr‐LDH show (HMF) conversion (99%), 2,5‐furandicarboxylic acid (FDCA) yield Faraday (100%) at 1.4 V RHE . The also exhibits remarkable stability 97% HMF after 10 cycles. X‐ray absorption near‐edge spectroscopy (XANES) theoretical calculation that beneficial the formation high‐valance Co significantly facilitates electron transfer, regulates adsorption behavior intermediates, reduces Gibbs free energy barrier accelerates reaction rate. This work promotes use rare earth elements promote HMF.

Язык: Английский

---

High‐Entropy Layered Double Hydroxides for Efficient Methanol Electrooxidation

Small, Год журнала: 2025, Номер 21(11)

Опубликована: Фев. 16, 2025

Abstract The electrocatalytic methanol oxidation reaction (MOR) is considered as an effective method to replace oxygen evolution (OER) for efficient hydrogen production. However, the sluggish kinetics and difficulty of breaking C─H bond Ni‐based catalysts limit further application. Herein, three high‐entropy layered double hydroxides (HELHs), namely ZnNiFeCoV‐HELH, ZnNiFeCoCr‐HELH, ZnNiFeCoAl‐HELH (denoted V‐HELH, Cr‐HELH, Al‐HELH, respectively), are successfully synthesized. Among them, V‐HELH displays lowest potential 1.39 V at 100 mA cm −2 compared Cr‐HELH (1.41 V) Al‐HELH (1.44 V). After five cycles, formate yield maintains over 95% first cycle with excellent stability. Such outstanding performance surpasses that most state‐of‐the‐art MOR reported so far. A series experiments reveal exhibits fastest largest number active Ni 3+ species. Further investigations theoretical calculations prove shows strongest adsorption energy −3.31 eV. introduction vanadium (V) relatively larger tensile strain optimizes d─band center (−0.54 eV) lowers barrier (−1.62 from * CH 3 O 2 O. This work provides new insights rational design electrocatalysts.

Язык: Английский

---

Advances in rare earth catalysts for small molecule electrosynthesis☆

Journal of Rare Earths, Год журнала: 2025, Номер unknown

Опубликована: Фев. 1, 2025

Язык: Английский

---

Research Progress on Photocatalytic, Electrocatalytic and Photoelectrocatalytic Selectively Oxidation of 5-Hydroxymethylfurfural

Green Chemistry, Год журнала: 2024, Номер 26(21), С. 10739 - 10773

Опубликована: Янв. 1, 2024

This paper summarizes the latest research progress in selective photocatalytic, electrocatalytic, and photoelectrocatalytic oxidation of HMF, along with reaction mechanisms, advantages, challenges faced during HMF oxidation.

Язык: Английский

---

Research progress of Ce-based electrocatalysts in hydrogen evolution reaction

Journal of Rare Earths, Год журнала: 2025, Номер unknown

Опубликована: Янв. 1, 2025

Язык: Английский

---

Revealing the Multiple Function of Nitrogen‐Doped Carbon Layer in Hematite‐Based Photoanode for Photoelectrochemical Water Oxidation

Advanced Functional Materials, Год журнала: 2025, Номер unknown

Опубликована: Фев. 11, 2025

Abstract Incorporating the charge transfer medium between semiconductor and cocatalyst accelerates separation of photogenerated charges, enhancing photoelectrochemical water oxidation performance. However, structure regulation in situ generated by is usually neglected, which would alter injection efficiency holes. Besides, more relevant technologies are necessary to investigate intrinsic action each part on oxidation. Herein, a novel triadic photoanode designed rationally, involving Ti‐doped hematite (Ti‐Fe 2 O 3 ) core, nitrogen‐doped carbon (CN) interlayer, Ce‐doped NiFe‐LDH (NFC) shell. The results like single‐molecule fluorescence short‐pulse transient photocurrent experiments reveal CN not only employs as hole layer facilitate bulk suppress back recombination, but also polishes up OH − absorption conjunction with NFC. Furthermore, exhibits an additional functionality inducing oxygen vacancies Ce 4+ NFC further raise efficiency, expediting generation from absorbed . Consequently, NFC/CN/Ti‐Fe presents significantly higher density than NFC/Ti‐Fe , accomplishing 2.87 mA cm −2 at 1.23 V versus RHE. design multiple‐functional strategic approach for regulating reactant transfer, thereby

Язык: Английский

---

Nanorectangular NiFe₂O₄ Decorated with CeO₂ Nanoparticles and Modified with Phosphate Ions as an Electrocatalyst for Water Electrolysis

ACS Applied Nano Materials, Год журнала: 2025, Номер unknown

Опубликована: Фев. 14, 2025

Язык: Английский

---

Enhancing Oxygen Evolution Catalysis by Tuning the Electronic Structure of NiFe-Layered Double Hydroxides Through Selenization

Nanomaterials, Год журнала: 2025, Номер 15(4), С. 294 - 294

Опубликована: Фев. 14, 2025

Electrocatalytic water splitting is a critical approach for achieving carbon neutrality, playing an essential role in clean energy conversion. However, the slow kinetics of oxygen evolution reaction (OER) remains major bottleneck hindering conversion efficiency. Although noble metal catalysts (e.g., IrO2 and RuO2) show excellent catalytic activity, their high cost scarcity limit applicability large-scale industrial processes. In this study, we introduce novel electrocatalyst based on selenized NiFe-layered double hydroxides (NiFe-LDHs), synthesized via simple hydrothermal method. Its key innovation lies selenization process, during which Ni atoms lose electrons to form selenides, while selenium (Se) gains electrons. This leads significant increase concentration high-valent ions, enhances electronic mobility, improves structural stability catalyst through formation Ni-Se bonds. Experimental results that NiFe-LDHs exhibit electrocatalytic performance 1 M KOH alkaline solution. (OER), achieved ultra-low overpotential 286 mV at current density 10 mA cm⁻2, with Tafel slope 63.6 dec⁻1. After 60 h continuous testing, showed almost no degradation, far outperforming conventional catalysts. These highlight potential NiFe-LDH@selenized electrolysis applications, providing effective solution efficient sustainable production.

Язык: Английский

---

Enhanced electrooxidation of 5-hydroxymethylfurfural over a ZIF-67@β-Ni(OH)2/NF heterostructure catalyst: Synergistic effects and mechanistic insights

Journal of Colloid and Interface Science, Год журнала: 2025, Номер 688, С. 806 - 817

Опубликована: Фев. 27, 2025

Язык: Английский

---

Reaction-Induced Reconstruction and Redispersion of Ni@C Catalyst for Enhancing Hmf Electrooxidation

Опубликована: Янв. 1, 2025

Язык: Английский

---