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

Environmental Science & Technology, Год журнала: 2025, Номер unknown

Опубликована: Янв. 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.

Язык: 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, Год журнала: 2024, Номер 58(27), С. 12082 - 12090

Опубликована: Июнь 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

Язык: 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, Год журнала: 2024, Номер unknown, С. 158299 - 158299

Опубликована: Дек. 1, 2024

Язык: Английский

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Copper Site Motion Promotes Catalytic NO_x Reduction under Zeolite Confinement

Environmental Science & Technology, Год журнала: 2023, Номер 57(42), С. 16121 - 16130

Опубликована: Окт. 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).

Язык: Английский

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

Environmental Science & Technology, Год журнала: 2023, Номер 57(32), С. 12127 - 12134

Опубликована: Авг. 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.

Язык: Английский

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

Separation and Purification Technology, Год журнала: 2025, Номер unknown, С. 131483 - 131483

Опубликована: Янв. 1, 2025

Язык: Английский

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Unveiling NO elimination performance on Ce-based AdSCR catalyst

Journal of Rare Earths, Год журнала: 2025, Номер unknown

Опубликована: Март 1, 2025

Язык: Английский

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

ACS Catalysis, Год журнала: 2025, Номер unknown, С. 6226 - 6238

Опубликована: Апрель 2, 2025

Язык: Английский

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

Catalysis Today, Год журнала: 2025, Номер unknown, С. 115314 - 115314

Опубликована: Апрель 1, 2025

Язык: Английский

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Efficient removal of oil mist via triboelectric negative air ions

Nano Energy, Год журнала: 2024, Номер 126, С. 109692 - 109692

Опубликована: Май 3, 2024

Язык: Английский

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