Elaborated Built-In Electric Field in Mn/C60 Heterojunction Promotes Electrocatalytic Nitrogen Reduction to Ammonia

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

Published: Jan. 1, 2025

The built-in electric field in the Mn/C 60 heterostructure optimized adsorption energy of key intermediate *NH–*NH 2 and reduced free barrier for third hydrogenation step, which enhanced intrinsic activity NRR.

Language: Английский

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Photothermal Catalytic Conversion of CO₂ to CO over Z-Scheme Co₉S₈@W₁₈O₄₉ Nanotubular Heterostructures

ACS Applied Nano Materials, Journal Year: 2025, Volume and Issue: unknown

Published: Jan. 7, 2025

The transformation of CO2 into fuel and valuable chemical products has become an important means to reduce the emissions greenhouse gases mitigate energy crisis. In addition, it is great significance for achieving carbon emission peak neutrality. Herein, Co9S8@W18O49 with a one-dimensional nanotubular core–shell structure was synthesized using three-step hydrothermal method photothermal catalytic reduction. photocatalytic performance evaluated by assessing production CO under visible light. results showed that 25 wt %-Co9S8@W18O49 exhibited excellent efficiency approximately 27.4 μmol g–1 h–1, notable 8.06-fold improvement compared pure W18O49 sample. creation heterojunction Z-scheme between Co9S8 nanotubes increased conversion inhibited recombination photogenerated charge carriers. Moreover, density functional theory calculations confirmed formed. This work aimed contribute insights design photocatalysts improved activity, which enhanced synergistic effect activation.

Language: Английский

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Electrocatalytic Biomass Oxidation via Acid‐Induced In Situ Surface Reconstruction of Multivalent State Coexistence in Metal Foams

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

Published: Jan. 23, 2025

Abstract Electrocatalytic biomass conversion offers a sustainable route for producing organic chemicals, with electrode design being critical to determining reaction rate and selectivity. Herein, prediction‐synthesis‐validation approach is developed obtain electrodes precise conversion, where the coexistence of multiple metal valence states leads excellent electrocatalytic performance due activated redox cycle. This promising integrated foam via acid‐induced surface reconstruction in situ generate highly active (oxy)hydroxide or oxide (MO x H y MO ) species on inert electrodes, facilitating electrooxidation 5‐hydroxymethylfurfural (5‐HMF) 2,5‐furandicarboxylic acid (FDCA). Taking nickel as an example, resulting NiO /Ni catalyst, featuring multivalent Ni, exhibits remarkable activity stability FDCA yields over 95% Faradaic efficiency 99%. In Raman spectroscopy theoretical analysis reveal Ni(OH) 2 /NiOOH‐mediated indirect pathway, chemical oxidation 5‐HMF rate‐limiting step. Furthermore, this can be extended various foams (Fe, Cu, FeNi, NiMo), offering mild, scalable, cost‐effective method preparing potent catalysts. promotes circular economy by enabling more efficient processes, providing versatile impactful tool field catalysis.

Language: Английский

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Glycine electrosynthesis by the co-reduction of oxalic and nitric acids on rutile TiO2

Chem Catalysis, Journal Year: 2025, Volume and Issue: unknown, P. 101266 - 101266

Published: Feb. 1, 2025

Language: Английский

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Thermal–Electrochemical Coupled Catalysis for Ammonia Synthesis under Atmospheric Pressure on Protonic Ceramic Electrolysis Cells Cooperated with Iron Catalysts

Energy & Fuels, Journal Year: 2025, Volume and Issue: unknown

Published: Feb. 26, 2025

Language: Английский

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Rational electrocatalyst design for selective nitrate reduction to ammonia

Chemical Physics Reviews, Journal Year: 2025, Volume and Issue: 6(1)

Published: Feb. 26, 2025

The electrocatalytic nitrate (NO3−) reduction reaction (NO3RR) is an attractive strategy for sustainable ammonia (NH3) synthesis, contributing to the artificial nitrogen cycle and renewable energy storage. However, selective conversion of NO3− NH3 remains challenging due complex multi-electron transfer processes, which result in numerous by-products, low yield rate, Faradaic efficiency. Additionally, electrochemical sensitivity catalyst structure complicates identifying active sites. Herein, we introduce mechanisms situ characterization technologies NO3RR production. Then, a summary theoretical research advances guide design catalyst, including density functional theory calculations, activity descriptors, machine learning. Furthermore, discuss strategies optimize performance NO3RR, focusing on nitrogenous-intermediate adsorption, proton tandem catalysis. Finally, challenges opportunities highly efficient are summarized.

Language: Английский

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Ferroelectric Polarization Effects of Single‐Atom Catalysts on Water Oxidation

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

Published: April 7, 2025

Abstract The oxygen evolution reaction (OER) performance of single‐atom catalysts (SACs) heavily depends on their substrates. However, heterojunctions with traditional substrate materials often fail to provide the desired dynamic interface effects. Here, through a systematic study ferroelectric heterostructure In 2 Se 3 /C‐N‐M, feasibility using achieve optimization OER activity SACs is demonstrated. confirmed be an effective for improving stability various SACs, supported by theoretical results negative formation energy and positive dissolution potential. Activity analysis indicates that among these /C‐N‐M systems, /C‐N‐Ir can near‐ideal catalytic activities polarization switching. It unprecedentedly catalyze via hybrid pathway adsorbate mechanism O‐O coupling under different pH conditions (from = 1 13). Machine learning models have been developed conduct feature make ultrafast predictions activity, which identify interfacial charge transfer triggered key fine‐tuning SACs. This work provides framework utilizes as powerful approach navigate design efficient

Language: Английский

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Asymmetric Cu0/Cu+ Interfaces for Efficient Electrochemical Nitrate Reduction to Ammonia Under Neutral and Ultralow Concentration

Research Square (Research Square), Journal Year: 2025, Volume and Issue: unknown

Published: April 15, 2025

The electrocatalytic conversion of nitrate to ammonia in neutral media offers profound potential for sustainable nitrogen management, albeit it has been critically impeded by persistent hurdles such as the sluggish kinetics and competitive adsorption H₂O molecules. Herein, we report reconstruction copper foam engineer asymmetric Cu⁰/Cu⁺ interfaces condition with ultralow concentration. Employing microstructural characterizations complemented kinetic isotope effect (KIE) analyses, uncover that Cu₂O/Cu electrocatalyst fosters formation rectifying interfaces, thereby facilitating accelerating hydrogenation H-ON environments. Notably, under conditions concentration (14 ppm NO₃⁻-N), demonstrates a remarkable 100% NO₃⁻ NH₃ within 15 minutes, removal ratio 99.9% an production rate 0.39 mmol/h/cm², effectively diminishing levels adhere national drinking water standards.

Language: Английский

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Surface crystallized supramolecular to achieve highly dispersed ultrafine nano-palladium in-situ deposition to promote thermal/electrocatalytic reduction

Journal of Colloid and Interface Science, Journal Year: 2024, Volume and Issue: 677, P. 1 - 11

Published: July 30, 2024

Language: Английский

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Spin Manipulation of Co sites in Co₉S₈/Nb₂CT_x Mott–Schottky Heterojunction for Boosting the Electrocatalytic Nitrogen Reduction Reaction

Advanced Science, Journal Year: 2024, Volume and Issue: unknown

Published: Sept. 3, 2024

Abstract Regulating the adsorption of an intermediate on electrocatalyst by manipulating electron spin state transition metal is great significance for promoting activation inert nitrogen molecules (N 2 ) during electrocatalytic reduction reaction (eNRR). However, achieving this remains challenging. Herein, a novel 2D/2D Mott–Schottky heterojunction, Co 9 S 8 /Nb CT x ‐P, developed as eNRR catalyst. This achieved through in situ growth cobalt sulfide (Co nanosheets over Nb MXene using solution plasma modification method. Transformation from low (t 2g 6 e g 1 to high 5 adjusting interface electronic structure and sulfur vacancy ‐P. The ability N optimized Co(II) with more unpaired electrons, significantly accelerating *N →*NNH kinetic process. ‐P exhibits NH 3 yield 62.62 µg h −1 mg cat. Faradaic efficiency (FE) 30.33% at −0.40 V versus reversible hydrogen electrode (RHE) 0.1 m HCl. Additionally, it achieves 41.47 FE 23.19% −0.60 RHE Na SO 4 . work demonstrates promising strategy constructing heterojunction electrocatalysts efficient eNRR.

Language: Английский

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