Engineering Ce Promoter to Regulate H^* Species to Boost Tandem Electrocatalytic Nitrate Reduction for Ammonia Synthesis

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

Published: Feb. 5, 2025

Abstract The renewable‐energy‐powered electroreduction of nitrate (NO 3 RR) to ammonia emerges as a generalist for contamination remediation, green synthesis, and even advanced energy conversion, garnering significant interest. However, it comes across limited yield selectivity due the imbalance active hydrogen (H * ) supply within cutting‐edge single‐center Cu‐based materials. Herein, secondary Ce entity is engineered into Cu/MoO 2 @C substrate by thermal treatment Ce‐doping NENU‐5 precursors provide H effectively. A high NH rate (20.3 ± 0.7 mg h −1 cat. NO − −to−NH Faradaic efficiency (92 3%) at −0.4 V (vs RHE) can be reached in 5%Ce‐Cu/MoO @C, ranking among recently reported state‐of‐the‐art catalysts. core this boosting performance lies dual‐site tandem catalysis, which Cu site adsorbs activates , dissociates water generate respectively. And spillover from vicinal x intermediates on promotes hydrogenation generation with selectivity. Theoretical calculations further indicate that engineering optimizes electronic properties, activation adsorbed decreases barrier rate‐determining step catalysis. These findings consolidate positive role rare earth center highlight its corresponding catalysis sustainable synthesis.

Language: Английский

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In Situ Facet Transformation Engineering over Co₃O₄ for Highly Efficient Electroreduction of Nitrate to Ammonia

ACS Catalysis, Journal Year: 2024, Volume and Issue: 14(19), P. 14887 - 14894

Published: Sept. 24, 2024

Language: Английский

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Engineering the Active Sites of MOF‐derived Catalysts: From Oxygen Activation to Activate Metal‐Air Batteries^†

Chinese Journal of Chemistry, Journal Year: 2024, Volume and Issue: 42(20), P. 2520 - 2535

Published: June 19, 2024

Comprehensive Summary The electrochemical processes of oxygen reduction reaction (ORR) and evolution (OER) play a crucial role in various energy storage conversion systems. However, the inherently slow kinetics reversible reactions present an urgent demand for development efficient electrocatalysts. Recently, metal‐organic framework (MOF) derivatives have attracted extensive attention electrocatalysis research due to their unique porous structure, abundant active sites, tunable structural properties. Especially, optimization electronic structure sites MOF has been proven as effective strategy enhance catalytic activity. In this review, we provide overview strategies advanced catalysts O—O bond activation reactions, including construction synergistic effects between multiple heterogeneous interfaces, utilization metal support interactions, precise modulation organic ligands surrounding at atomic level. Furthermore, review offers theoretical insights into mechanisms derivatives, well identification sites. Finally, potential challenges prospects are discussed. This contributes understanding advancement Key Scientists

Language: Английский

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Electrodialysis and nitrate reduction (EDNR) to enable distributed ammonia manufacturing from wastewaters

Energy & Environmental Science, Journal Year: 2024, Volume and Issue: unknown

Published: Jan. 1, 2024

Underutilized wastewaters containing dilute levels of reactive nitrogen (Nr) can help rebalance the cycle.

Language: Английский

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The charge redistribution induced by Cu-Co bimetallic synergies efficiently promotes electrochemical reduction to ammonia

Applied Surface Science, Journal Year: 2025, Volume and Issue: unknown, P. 162950 - 162950

Published: March 1, 2025

Language: Английский

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In Situ Formation of FeNi Nanoparticles on Polypyrrole Hydrogel for Efficient Electrocatalytic Nitrate Reduction to Ammonia

Molecules, Journal Year: 2025, Volume and Issue: 30(6), P. 1271 - 1271

Published: March 12, 2025

The electrocatalytic reduction of nitrate to ammonia (NH3) under mild environmental conditions is attracting increasing attention, in which efficient and inexpensive transition metal catalysts, with the advantages abundancy low cost, play a key role. However, synergistic activity selectivity promotion are still highly challenging. Herein, we developed hydrogel-assisted strategy prepare FeNi nanoparticles via situ adsorption Fe/Ni precursors on polypyrrole hydrogel. After optimization, maximum NH3 yield reached 0.166 mmol h−1 cm−2, Faradaic efficiency 88.9% 86.6%. This excellent electrochemical performance was attributed mesoporous hydrophilic structure hydrogel, facilitates homogeneous loading provides channel for both charge mass transfer during reduction, important conversion NO3− NH3. Electrochemical active surface area determination impedance spectroscopy showed that introduction hydrogel increased sites improved transfer. study an effective improving electrocatalysts by utilizing three-dimensional network electrical conductivity.

Language: Английский

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Self-reducing Cu2O/Cu nanosheet interface for efficient electrocatalytic production of ammonium from nitrate

Applied Catalysis B Environment and Energy, Journal Year: 2025, Volume and Issue: unknown, P. 125254 - 125254

Published: March 1, 2025

Language: Английский

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Ammonia production

Elsevier eBooks, Journal Year: 2025, Volume and Issue: unknown

Published: Jan. 1, 2025

Language: Английский

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Electron-deficient CoO induced charge redistribution on CuCoO-NC nanohybrid for electrocatalytic reduction of nitrate to ammonia

Fuel, Journal Year: 2024, Volume and Issue: 380, P. 133159 - 133159

Published: Sept. 17, 2024

Language: Английский

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High-entropy FeCoNiCuRu solid solutions triggered cocktail effect to achieve fine-tuning adsorption energy for boosting nitrate electroreduction to ammonia

Chemical Engineering Journal, Journal Year: 2024, Volume and Issue: 500, P. 157426 - 157426

Published: Nov. 1, 2024

Language: Английский

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