CoSe₂@NiSe‐CoSe₂ Heterojunction for Enhanced Electrocatalytic 5‐Hydroxymethylfurfural Oxidation Coupled with Hydrogen Evolution

Advanced Functional Materials, Journal Year: 2025, Volume and Issue: unknown

Published: Jan. 2, 2025

Abstract Electrochemical 5‐hydroxymethylfurfural oxidation reaction (HMFOR) offers a promising approach to producing valuable chemicals and facilitating coupled H 2 production. A significant challenge in the HMFOR lies elucidating interaction mechanisms between active sites (HMF). However, unpredictable reconstruction of during catalytic process complicates understanding these mechanisms. In this study, novel heterojunction (CoSe @NiSe‐CoSe /NF) is synthesized using straightforward hydrothermal method combined with classical selenization. This demonstrates exceptional electrocatalytic performance for direct HMF oxidation, achieving Faradaic efficiency 2,5‐furanedicarboxylic acid (FDCA) up 97.9%. Notably, it requires only 1.29 V versus RHE achieve current density 10 mA cm −2 HMFOR‐assisted hydrogen evolution (HER). The high activity primarily arises from interfacial electron redistribution. Specifically, Co modulates band structure Ni, Se serving as intermediary. modulation increases adsorption energy reduces barrier rate‐determining step HMFOR. research not achieves selective synthesis high‐value but also provides comprehensive analysis structure‐performance relationship catalyst, offering new pathway development efficient heterogeneous catalysts.

Language: Английский

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Utilizing cationic vacancies to enhance nickel-cobalt layered double hydroxides for efficient electrocatalytic urea oxidation reaction

Chemical Engineering Journal, Journal Year: 2024, Volume and Issue: unknown, P. 156766 - 156766

Published: Oct. 1, 2024

Language: Английский

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Probing local structure and electronic structure of α-Fe2O3/g-C3N4 S-scheme heterojunctions for boosting CO2 photoreduction

Journal of Colloid and Interface Science, Journal Year: 2025, Volume and Issue: unknown

Published: Jan. 1, 2025

Language: Английский

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Optimizing Electro‐Oxidation Kinetics via Constructing Built‐In Electric Field on Pd‐Ni(OH)₂ Heterostructures for Selective Oxidation of Benzylamine to Benzonitrile

Small, Journal Year: 2025, Volume and Issue: unknown

Published: Feb. 7, 2025

Abstract Rationally regulating redox properties of electrocatalysts is highly essential to accomplish selective electro‐oxidation benzylamine (BA) benzonitrile (BN) and concurrently promote hydrogen evolution reaction (HER) at cathode. Herein, a facile built‐in electric field (BIEF) engineering strategy optimize the electrocatalytic kinetics for BA oxidation (BOR) on Pd‐Ni(OH) 2 heterostructures, presented. Both experimental theoretical results confirm construction BIEF with direction from α‐Ni(OH) nanosheet Pd nanoparticle heterointerface. It unequivocally found that creation favorable not only generation electroactive Ni(OH)O species, but also adsorption dehydrogenation molecules, achieving significantly promoted BOR kinetics. As expected, catalyst shows excellent performance toward selectively oxidizing BN, which further coupled cathodic H production. The faradaic efficiency (FE) BN production can approximate 85% in two‐electrode electrolyzer. In situ Raman spectroscopy electrochemical measurements disclose activity origin dehydronated intermediate, clarifying direct mechanism over electrode. This work highlights an effective insight into design synthesis active organic upgrading.

Language: Английский

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Unraveling the Synergistic Effect of Hollow Sea Urchin-like Ag–Co₃O₄ Heterostructures in Electrochemical Dehydrogenation Reactions: Interface-Enhanced Electron Transfer and Desorption Process

ACS Catalysis, Journal Year: 2025, Volume and Issue: unknown, P. 7966 - 7978

Published: April 29, 2025

Language: Английский

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Ultrafast Conversion of Water and Oxygen Molecules With Dissociation of Hydrogen Bonding Effect to Achieve Extra‐High Energy Efficiency of Secondary Metal‐Air Batteries

Small, Journal Year: 2024, Volume and Issue: 20(46)

Published: Aug. 8, 2024

Abstract Metal‐air secondary batteries with ultrahigh specific energies have received vast attention and are considered new promising energy storage. The slow redox reactions between oxygen‐water molecules lead to low efficiency (55–71%) limited applications. Herein, it is proposed that the MIL‐68(In)‐derived porous carbon nanotube supports CoNiFeP heteroconjugated alloy catalyst an overboiling point electrolyte achieve oxidation rate of water molecules. Structural characterization density functional theory calculations reveal greatly reduces free process, further accelerates dissociation O─H hydrogen bonds, release O 2 molecules, achieving extra‐low overpotential 110 mV@10 mA cm −2 far lower than commercial Ir/C catalysts 192 mV at 125 °C state‐of‐the‐art. Furthermore, assembled rechargeable zinc‐air begins break through 85 °C, jumps 100 reaches 88.1% ultralow decay 0.0068% after 150 cycles superior those reported metal‐air batteries. This work provides a joint‐design strategy reexamines battery operating temperature construct higher for fuel cells.

Language: Английский

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Unveiling the Promotion of Fe in Ni₃S₂ Catalyst on Charge Transfer for the Oxygen Evolution Reaction

Small, Journal Year: 2024, Volume and Issue: unknown

Published: Sept. 5, 2024

Abstract In recent years, catalysts based on transition metal sulfides have garnered extensive attention due to their low cost and excellent electrocatalytic activity in the alkaline oxygen evolution reaction. Here, preparation of Fe‐doped Ni 3 S 2 via a one‐step hydrothermal approach is reported by utilizing inexpensive metals Fe. an medium, Fe–Ni exhibits outstanding stability for OER, current density can reach 10 mA cm −2 with overpotential 163 mV. addition, Pt/C||Fe–Ni used as membrane electrode anion exchange water electrolyzer, which capable providing 650 at cell voltage 2.0 V, outperforming benchmark Ir/C. The principle revealed that doping Fe enhances decomposition ability situ Raman X‐ray absorption fine structure. results indicate decreases charge near atoms, renders more favorable adsorption OH − formation * OO intermediates. This work puts forward effective strategy significantly improve both OER low‐cost electrocatalysts.

Language: Английский

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Theoretical design and synthesis of Co30Ni60/CC for high selective methanol oxidation assisted energy-saving hydrogen production

Journal of Colloid and Interface Science, Journal Year: 2024, Volume and Issue: 679, P. 90 - 99

Published: Sept. 30, 2024

Language: Английский

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Mild and rapid construction of Ti electrodes for efficient and corrosion-resistant oxidative catalysis at industrial-grade intensity

Journal of Colloid and Interface Science, Journal Year: 2024, Volume and Issue: 679, P. 566 - 577

Published: Oct. 4, 2024

Language: Английский

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Room Temperature Synthesis of Gradient‐Distributed Ni/Fe Sites in Layered Double Hydroxides for Enhanced Oxygen Evolution Reaction

Small, Journal Year: 2024, Volume and Issue: unknown

Published: Dec. 17, 2024

NiFe-based materials, especially NiFe layered double hydroxides (LDHs), are recognized as the most promising non-precious metal electrocatalysts for alkaline oxygen evolution reaction (OER). However, precisely designed distribution of active sites enhancing activities is still significantly restricted due to lack reasonable modulation strategies. Herein, sulfur doped Ni/Fe gradient-distributed LDH (GD-NiFe LDH/S) fabricated by facile air-induced strategy at room temperature. This accelerates growth process with abundant CO

Language: Английский

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