N-doped carbon sheets supported P-Fe3O4-MoO2 for freshwater and seawater electrolysis

Journal of Colloid and Interface Science, Journal Year: 2023, Volume and Issue: 652, P. 1217 - 1227

Published: Aug. 23, 2023

Language: Английский

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Boosted N₂ Activation through 4f–2p–3d Orbital Hybridization for Efficient Nitrate Electrosynthesis

Advanced Functional Materials, Journal Year: 2023, Volume and Issue: 33(49)

Published: Aug. 1, 2023

Abstract The electrochemical N 2 oxidation reaction (NOR) has emerged as a promising approach for achieving high selectivity in nitric acid (HNO 3 ) production. However, the sluggish activation process NOR due to cleavage energy barrier of N≡N bond remains challenge. Herein, novel orbital hybridization strategy tuning performance through construction cerium (Ce) 4f–O 2p–Co 3d network Ce‐doped Co O 4 (Ce–Co is proposed. Ce–Co catalyst exhibits an enhanced HNO yield 24.76 µg h −1 mg cat and promoted Faradaic efficiency 31.93% 0.1 m Na SO electrolyte under ambient conditions compared those pure (13.75 23.43%). Density functional theory caculations demonstrate strong 4f–2p–3d electron transfer . Moreover, series situ techniques provide direct evidence stronger adsorption peaks Co─N key intermediate *NO formed after on surface This work provides route preparation efficient catalysts sheds light mechanism hybridization.

Language: Английский

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Boosting catalytic oxidation of propane over CeO2-supported Co3O4 catalyst with strong interfacial interaction and electron transfer

Journal of Catalysis, Journal Year: 2024, Volume and Issue: 434, P. 115529 - 115529

Published: May 1, 2024

Language: Английский

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In Situ Reconstructed Cu/β‐Co(OH)₂ Tandem Catalyst for Enhanced Nitrate Electroreduction to Ammonia in Ampere‐Level

Advanced Energy Materials, Journal Year: 2024, Volume and Issue: 14(41)

Published: Aug. 7, 2024

Abstract The electrochemical nitrate reduction for green ammonia production is attracting increasing attention, where the catalysts are widely investigated by controlling compositions or structures to achieve high performance. However, their reconstructions under potentials inevitable and uncontrollable, leading uncertain performance, a confused understanding of mechanism. In this work, strategy proposed pre‐catalyst's reconstruction chemistry toward reaction (e‐NO 3 RR) with superior activity stability. To demonstrate idea, pre‐catalyst fabricated α ‐Co(OH) 2 Cu(OH) ( /Cu(OH) ), which in situ reconstructed tandem catalyst Cu β (Cu/ β‐ Co(OH) ) working potential. Cu/ achieves an optimal Faraday efficiency 97.7% yield rate 3.9 mmol h −1 cm −2 at −0.5 V, outperforming other reported metal‐hydroxide catalysts. experimental theoretical results that catalytic mechanism responsible exceptional performance: 1) functions as donor nitrite; 2) serves active sites generating hydrogen reducing nitrogen‐containing groups. This work highlights controllable improved performance can be realized, provides insightful mechanism, helpful developing stable various applications.

Language: Английский

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Mechanistic insights into methane total oxidation over Cu/Hydroxyapatite catalyst synthesized with β-Cyclodextrin assistance

Chemical Engineering Journal, Journal Year: 2024, Volume and Issue: 489, P. 151324 - 151324

Published: April 15, 2024

Language: Английский

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