Selective Electrocatalytic Conversion of Nitric Oxide to High Value‐Added Chemicals

Advanced Materials, Journal Year: 2024, Volume and Issue: 36(18)

Published: Jan. 25, 2024

The artificial disturbance in the nitrogen cycle has necessitated an urgent need for nitric oxide (NO) removal. Electrochemical technologies NO conversion have gained increasing attention recent years. This comprehensive review presents advancements selective electrocatalytic of to high value-added chemicals, with specific emphasis on catalyst design, electrolyte composition, mass diffusion, and adsorption energies key intermediate species. Furthermore, explores synergistic electrochemical co-electrolysis carbon source molecules, enabling synthesis a range valuable chemicals C─N bonds. It also provides in-depth insights into intricate reaction pathways underlying mechanisms, offering perspectives challenges prospects electrolysis. By advancing comprehension fostering awareness balance, this contributes development efficient sustainable systems from NO.

Language: Английский

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Purification and Value-Added Conversion of NO_x under Ambient Conditions with Photo-/Electrocatalysis Technology

Environmental Science & Technology, Journal Year: 2025, Volume and Issue: unknown

Published: Jan. 6, 2025

As primary air pollutants from fossil fuel combustion, the excess emission of nitric oxides (NOx) results in a series atmospheric environmental issues. Although selective catalytic reduction technology has been confirmed to be effective for NOx removal, green purification and value-added conversion under ambient conditions are still facing great challenges, especially nitrogen resource recovery. To address that, photo-/electrocatalysis offers sustainable routes efficient upcycling temperature pressure, which received considerable attention scientific communities. In this review, recent advances critically summarized. The target products reaction mechanisms systems, together with responsible active sites, discussed, respectively. Then, realistic practicability is proposed, including strict performance evaluation criteria application by photo-/electrocatalysis. Finally, current challenges future opportunities proposed terms catalyst design, enhancement, mechanism understanding, practical conditions, product separation techniques.

Language: Английский

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Dual built-in spontaneous electric fields in an S-scheme heterojunction for enhanced photocatalytic H₂O₂ production

Catalysis Science & Technology, Journal Year: 2024, Volume and Issue: 14(9), P. 2514 - 2521

Published: Jan. 1, 2024

A facile photodeposition method was used to selectively modify Cu 2 O and MnOOH on BiVO 4 . The improved H -production activity mainly attributed the dual built-in electric field in /Cu S-scheme heterojunction.

Language: Английский

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Photocatalytic NO_x removal and recovery: progress, challenges and future perspectives

Chemical Science, Journal Year: 2024, Volume and Issue: 15(24), P. 9026 - 9046

Published: Jan. 1, 2024

The excessive production of nitrogen oxides (NO x ) from energy production, agricultural activities, transportation, and other human activities remains a pressing issue in atmospheric environment management.

Language: Английский

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Selective electrosynthesis of hydroxylamine from aqueous nitrate/nitrite by suppressing further reduction

Nature Communications, Journal Year: 2024, Volume and Issue: 15(1)

Published: Nov. 12, 2024

The electrocatalytic reduction of nitrogenous waste offers a sustainable approach to producing nitrogen-containing chemicals. selective synthesis high-value hydroxylamine (NH2OH) is challenging due the instability NH2OH as an intermediate. Here, we present rational electrocatalyst design strategy for promoting electrosynthesis by suppressing competing pathways further reduction. We screen zinc phthalocyanines (ZnPc) with high energy barrier regulating their intrinsic activity. Additionally, discover that carbon nanotube substrates exhibit significant NH3-producing activity, which can be effectively inhibited coverage ZnPc molecules. In-situ characterizations reveal and HNO are generated intermediates in nitrate NH3, enriched electrode. In H-cell, optimized catalyst demonstrates Faradaic efficiency (FE) 53 ± 1.7% partial current density exceeding 270 mA cm−2 turnover frequency 7.5 0.2 s−1. It also enables rapid cyclohexanone oxime from nitrite FE 64 1.0%. Electroreduction or appealing route but remains its intermediate nature. authors fast tuning metal phthalocyanine activity removing side reaction sites.

Language: Английский

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The •OH-induced direct ammonia oxidation pathway for nitric acid photosynthesis

Chemical Engineering Journal, Journal Year: 2025, Volume and Issue: unknown, P. 160522 - 160522

Published: Feb. 1, 2025

Language: Английский

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Regulation of oriented NO photooxidation to circumvent NO2 with high-coordinated M–N5 (M = Fe, Co, Mn, Ti) sites and far–carbon defects

Applied Catalysis B Environment and Energy, Journal Year: 2024, Volume and Issue: 350, P. 123948 - 123948

Published: April 24, 2024

Language: Английский

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NH₃ Synthesis from N₁ Compounds by Photocatalytic Technology: Promotion Mechanism, Reaction Pathways, and Efficiency Evaluation Criteria

ACS Catalysis, Journal Year: 2024, Volume and Issue: 14(20), P. 15721 - 15742

Published: Oct. 9, 2024

Ammonia (NH3) is one of the most important chemicals in high demand human society. Given high-energy consumption and environmental impact associated with Haber–Bosch process, an environmentally friendly method for NH3 synthesis under ambient conditions should be developed. The reduction N1 compounds, including nitrate (NO3–), nitrite (NO2–), nitric oxide (NOx), are more energetically favorable than that nitrogen (N2), avoiding activation inert N≡N bonds. Photocatalytic from compounds' reduction, which utilizes sunlight to convert contaminants into value-added chemicals, offers intriguing approach synthesis. This review a comprehensive overview progress research photocatalysis technology compounds Insight efficiency promotion mechanism provided, particularly focusing on optimization photocatalyst, mass transfer reactants, redox synergistic promotion. Moreover, reaction pathways summarized. evaluation criteria, accurate quantification yield, performance indicators, separation recovery, discussed guide systematic reliable Finally, current achievements future challenges photocatalytic critically discussed.

Language: Английский

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Ru‐Incorporation‐Induced Phase Transition in Co Nanoparticles for Low‐Concentration Nitric Oxide Electroreduction to Ammonia at Low Potential

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

Published: Nov. 6, 2024

Abstract Electrocatalytic reduction of nitric oxide (NO) to ammonia (NH 3 ) represents a potential solution for improving the disrupted nitrogen cycle balance. Unfortunately, designing efficient electrocatalysts NO reaction (NORR) remains notable challenge, especially at low concentrations. Herein, displacement‐alloying strategy is reported successfully induce phase transition Co nanoparticles supported on carbon nanosheets from face‐centered cubic (fcc) hexagonal close‐packed (hcp) structure through Ru incorporation. The obtained RuCo alloy with hcp (hcp‐RuCo) exhibits apparent NORR activity record‐high Faraday efficiency 99.2% and an NH yield 77.76 µg h −1 mg cat −0.1 V versus reversible hydrogen electrode concentration 1 vol %, surpassing fcc most catalysts. Density functional theory calculations reveal that excellent hcp‐RuCo can be attributed optimized electronic site lowered energy barrier rate‐determining step transition. Furthermore, assembled Zn‐NO battery using as cathode achieves power density 2.33 mW cm −2 45.94 . This work provides promising research perspective low‐concentration conversion.

Language: Английский

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Low-dimensional materials for ammonia synthesis

Chemical Society Reviews, Journal Year: 2025, Volume and Issue: unknown

Published: Jan. 1, 2025

Low-dimensional materials (LDMs), including 0D, 1D, and 2D nanostructures their heterostructures, are reviewed for applications in photocatalytic, electrocatalytic, photoelectrocatalytic synthesis of value-added ammonia.

Language: Английский

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