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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Unraveling the Synergistic Mechanism of Ir Species with Various Electron Densities over an Ir/ZSM-5 Catalyst Enables High-Efficiency NO Reduction by CO

Environmental Science & Technology, Journal Year: 2024, Volume and Issue: 58(27), P. 12082 - 12090

Published: June 18, 2024

Selective catalytic reduction using CO as a reducing agent (CO-SCR) has exhibited its application potential in coal-fired, steel, and other industrial sectors. In comparison to NH

Language: Английский

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An oxidation-adsorption site separation strategy for stabilizing Pd-Pt/SSZ-13 PNA materials under high CO pressure

Chemical Engineering Journal, Journal Year: 2024, Volume and Issue: unknown, P. 158299 - 158299

Published: Dec. 1, 2024

Language: Английский

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Copper Site Motion Promotes Catalytic NO_x Reduction under Zeolite Confinement

Environmental Science & Technology, Journal Year: 2023, Volume and Issue: 57(42), P. 16121 - 16130

Published: Oct. 16, 2023

Ammonia-mediated selective catalytic reduction (NH3-SCR) is currently the key approach to abate nitrogen oxides (NOx) emitted from heavy-duty lean-burn vehicles. The state-of-art NH3-SCR catalysts, namely, copper ion-exchanged chabazite (Cu-CHA) zeolites, perform rather poorly at low temperatures (below 200 °C) and are thus incapable of eliminating effectively NOx emissions under cold-start conditions. Here, we demonstrate a significant promotion low-temperature by reinforcing dynamic motion zeolite-confined Cu sites during NH3-SCR. Combining complex impedance-based in situ spectroscopy (IS) extended density-functional tight-binding molecular dynamics simulation, revealed an environment- temperature-dependent nature within zeolite lattice. Further coupling IS with infrared allows us unravel critical role monovalent overall mobility level. Based on these mechanistic understandings, elicit boost below °C various Cu-zeolites (Cu-CHA, Cu-ZSM-5, Cu-Beta, etc.) via facile postsynthesis treatments, either reductive mixture 250 or nonoxidative atmosphere high (above 450 °C).

Language: Английский

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Continuous NO Upcycling into Ammonia Promoted by SO₂ in Flue Gas: Poison Can Be a Gift

Environmental Science & Technology, Journal Year: 2023, Volume and Issue: 57(32), P. 12127 - 12134

Published: Aug. 2, 2023

Although ammonia (NH3) synthesis efficiency from the NO reduction reaction (NORR) is significantly promoted in recent years, one should note that of major air pollutants flue gas. The limited conversion ratio still key challenge for sustainable development NORR route, which potentially contributes more to contaminant emissions rather than its upcycling. Herein, we provide a simple but effective approach continuous into NH3, by coexisting SO2 poison as gift It significant discover plays decisive role elevating capacity absorption and reduction. A unique redox pair SO2–NO constructed, exceptionally high both (97.59 ± 1.42%) (99.24 0.49%) flow. ultrahigh selectivity NO-to-NH3 upcycling (97.14 0.55%) SO2-to-SO42– purification (92.44 0.71%) achieved synchronously, demonstrating strong practicability value-added contaminants. molecular mechanism revealed comprehensive situ technologies identify essential contribution Besides, realistic practicality realized efficient product recovery resistance ability against various poisoning effects. proposed strategy this work not only achieves milestone NH3 also raises great concerns about resourcing conditions.

Language: Английский

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Mn loading effects on MnO /CeZrO low temperature passive NO adsorbers

Separation and Purification Technology, Journal Year: 2025, Volume and Issue: unknown, P. 131483 - 131483

Published: Jan. 1, 2025

Language: Английский

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Unveiling NO elimination performance on Ce-based AdSCR catalyst

Journal of Rare Earths, Journal Year: 2025, Volume and Issue: unknown

Published: March 1, 2025

Language: Английский

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Atomic-Level Regulation of Mn Monovacancies of 2D-Mn₂O₃ for High-Efficient Catalytic Diesel Oxidation

ACS Catalysis, Journal Year: 2025, Volume and Issue: unknown, P. 6226 - 6238

Published: April 2, 2025

Language: Английский

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Efficient NOx abatement by passive adsorption over SSZ-16 zeolite supported palladium

Catalysis Today, Journal Year: 2025, Volume and Issue: unknown, P. 115314 - 115314

Published: April 1, 2025

Language: Английский

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Efficient removal of oil mist via triboelectric negative air ions

Nano Energy, Journal Year: 2024, Volume and Issue: 126, P. 109692 - 109692

Published: May 3, 2024

Language: Английский

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