Interface engineering of Co9S8-Ni3S2/Cu heterogeneous electrocatalyst for enhanced HMF oxidation

Applied Surface Science, Год журнала: 2025, Номер unknown, С. 162401 - 162401

Опубликована: Янв. 1, 2025

Язык: Английский

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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

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Unveiling Mechanistic Insight into Boosting Oxygen Species Activation over CeO2/Mn2O3 p–n Heterojunction for Efficient Photothermal Mineralization of Toluene

Journal of Hazardous Materials, Год журнала: 2025, Номер unknown, С. 137423 - 137423

Опубликована: Янв. 1, 2025

Язык: Английский

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Heterogeneous interface induced Co3O4-NiO catalyst for efficient electrocatalytic 5-Hydroxymethylfurfural oxidation

Chemical Engineering Journal, Год журнала: 2023, Номер 481, С. 148303 - 148303

Опубликована: Дек. 27, 2023

Язык: Английский

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Modulation of hydroxymethyl/aldehyde groups activation on V2O3 decorated CuCo for 5-hydroxymethylfurfural electrooxidation

Chemical Engineering Journal, Год журнала: 2024, Номер 485, С. 149774 - 149774

Опубликована: Фев. 16, 2024

Язык: Английский

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Ce‐Doping Rather Than CeO₂ Modification and Their Synergistic Effect: Promotion from Ce Species in the Electrocatalytic Oxidation of 5‐Hydroxymethylfurfural Over NiFe–LDH

Advanced Energy Materials, Год журнала: 2024, Номер 14(38)

Опубликована: Июль 11, 2024

Abstract Electrocatalytic oxidation of 5‐hydroxymethylfurfural (HMFOR) is an effective route to produce value‐added chemicals with low energy consumption. In this work, efficient electrocatalysts are prepared by varying the amount Ce doping and CeO 2 modification on NiFe layered double hydroxide (NiFe–LDH) nanosheets supported carbon cloth (CC). Through heterogeneous interface construction, electronic structure coordination chemistry NiFe–LDH greatly changed. Compared synergistic effect Ce‐doping modification, CC@NiFeCe(3%)‐LDH only show excellent charge transfer ability, higher HMF conversion (95.73%), 2,5‐furandicarboxylic acid (FDCA) selectivity (93.31%), Faraday efficiency (99.47%) at 1.44 V RHE . Density‐functional theory calculations X‐ray fine spectroscopy demonstrate that doping, compared their effects, significantly facilitates electron transport optimizes intermediate adsorption effectively lowering activation for transformation 5‐formyl‐2‐furancarboxylic (FFCA) encourage FFCA FDCA. Overall, work systemically investigates HMFOR behaviors CC@NiFe–LDH under synergetic effect, which provides some guidance development high‐performance performance.

Язык: Английский

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Regulation of the d-band center of metal–organic frameworks for energy-saving hydrogen generation coupled with selective glycerol oxidation

Proceedings of the National Academy of Sciences, Год журнала: 2024, Номер 121(17)

Опубликована: Апрель 17, 2024

The hybrid electrolyzer coupled glycerol oxidation (GOR) with hydrogen evolution reaction (HER) is fascinating to simultaneously generate H 2 and high value-added chemicals low energy input, yet facing a challenge. Herein, Cu-based metal–organic frameworks (Cu-MOFs) are reported as model catalysts for both HER GOR through doping of atomically dispersed precious nonprecious metals. Remarkably, the activity Ru-doped Cu-MOF outperformed Pt/C catalyst, its Faradaic efficiency formate formation at 90% potential 1.40 V. Furthermore, only needed 1.36 V achieve 10 mA cm −2 , 340 mV lower than that splitting pure water. Theoretical calculations demonstrated electronic interactions between host guest (doped) metals shifted downward d-band centers (ε d ) MOFs. This consequently lowered water adsorption dissociation barriers optimized energy, leading significantly enhanced activities. Meanwhile, downshift ε reduced rate-limiting step OH*, synergistically enhancing MOFs GOR. These findings offered an effective means simultaneous productions fuel using one input.

Язык: Английский

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Ligand‐Hybridization Activates Lattice‐Hydroxyl‐Groups of NiCo(OH)_x Nanowires for Efficient Electrosynthesis

Angewandte Chemie International Edition, Год журнала: 2024, Номер 63(41)

Опубликована: Июль 13, 2024

Electrochemical dehydrogenation of hydroxides plays a crucial role in the formation high-valence metal active sites toward 5-hydroxymethylfurfural oxidation reaction (HMFOR) to produce value-added chemical 2,5-furandicarboxylic (FDCA). Herein, we construct benzoic acid ligand-hybridized NiCo(OH)

Язык: Английский

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Synergistic integration of PdCu alloy on TiO₂ for efficient photocatalytic CO₂ reduction to CH₄ with H₂O

Journal of Materials Chemistry A, Год журнала: 2024, Номер 12(35), С. 23577 - 23589

Опубликована: Янв. 1, 2024

The synergistic effect of PdCu alloys on TiO 2 nanosheets expands the light-absorption range, improves adsorption CO and H O, accelerates photogenerated electron migration, resulting in an increased CH 4 yield with a selectivity 98.7%.

Язык: Английский

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Enhancing the Electrocatalytic Oxidation of 5-Hydroxymethylfurfural Through Cascade Structure Tuning for Highly Stable Biomass Upgrading

Nano-Micro Letters, Год журнала: 2024, Номер 16(1)

Опубликована: Авг. 22, 2024

Abstract Electrocatalytic 5-hydroxymethylfurfural oxidation reaction (HMFOR) provides a promising strategy to convert biomass derivative high-value-added chemicals. Herein, cascade is proposed construct Pd–NiCo 2 O 4 electrocatalyst by Pd loading on Ni-doped Co 3 and for highly active stable synergistic HMF oxidation. An elevated current density of 800 mA cm –2 can be achieved at 1.5 V, both Faradaic efficiency yield 2,5-furandicarboxylic acid remained close 100% over 10 consecutive electrolysis. Experimental theoretical results unveil that the introduction atoms modulate local electronic structure Ni/Co, which not only balances competitive adsorption OH – species, but also promote Ni 3+ species formation, inducing high indirect activity. We have discovered incorporation facilitates 2+ pre-oxidation electrophilic OH* generation contribute direct process. This work new approach design advanced upgrading.

Язык: Английский

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