Enhanced Nitrous Oxide Decomposition on Zirconium-Supported Rhodium Catalysts by Iridium Augmentation

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

Опубликована: Янв. 15, 2025

The effective elimination of N2O from automobile exhaust at low temperatures poses significant challenges. Compared to other materials, supported RhOx catalysts exhibit high decomposition activities, even in the presence O2, CO2, and H2O. Metal additives can enhance low-temperature activities over catalysts; however, enhancement mechanism active sites require further investigation. In this study, we demonstrate activity a monoclinic ZrO2-supported Rh catalyst [Rh(1)/ZrO2] with Ir addition + O2 CO2 promotional effect on Rh(1)–Ir(1)/ZrO2 (Rh = 1 wt % %) were investigated by kinetic studies situ spectroscopic methods, including X-ray absorption spectroscopy, ambient-pressure photoelectron ultraviolet–visible spectroscopy. These results indicate that both surface species for catalytic temperatures, augmentation promoted desorption gaseous which are regarded as key steps decomposition.

Язык: Английский

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Heterogeneous catalysis for the environment

The Innovation Materials, Год журнала: 2024, Номер unknown, С. 100090 - 100090

Опубликована: Янв. 1, 2024

<p>Anthropogenic climate and environmental changes increasingly threaten the sustainability of life on Earth, hindering sustainable development human societies. These detrimental ecological are driven by activities that have elevated atmospheric levels greenhouse gases toxic substances, increased inorganic organic pollutants in water bodies, led to accumulation solid waste soils. Over next two three decades, impacts change, pollution, soil contamination expected intensify, posing increasing risks health global stability. Considering these trends, it is essential implement robust mitigation adaptation strategies. This paper analyzes pollution problems from perspectives atmospheric, water, contamination. It summarizes current research heterogeneous catalysis for treating gaseous, liquid, phases, with an emphasis key challenges applying catalytic conversion technologies cost-effective industrial settings. Finally, strategies mitigating via discussed material flow, energy data flow. aims offer scientific insights enhance future practice remediation.</p>

Язык: Английский

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The Critical Role of Oxygen Vacancies in N₂O Decomposition Over Cobalt-Doped CeO₂ Catalysts

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

Опубликована: Март 4, 2025

Catalytic decomposition is a promising method for N2O removal, and the nature of active sites on catalysts under debate. The combination experimental observations density functional theory (DFT) calculations indicates that oxygen vacancies in metal oxide serve as decomposition. Co doping CeO2 significantly increases content vacancies, thereby enhancing activity catalyst A with Co/Ce = 1 exhibited best activity, T90 375 °C excellent stability maintained over 100 h, which much better than Co3O4 spinel. finding advances understanding catalytic contributes to design highly efficient catalysts.

Язык: Английский

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Nitrous oxide as diazo transfer reagent

Chemical Science, Год журнала: 2024, Номер 15(34), С. 13605 - 13617

Опубликована: Янв. 1, 2024

The review summarizes the use of nitrous oxide (N 2 O, ‘laughing gas’) as a diazo transfer reagent in synthetic chemistry.

Язык: Английский

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Unveiling the vital role of the C-PO3 functional group for enhancing N2O adsorption on eucalyptus-based porous carbon

Fuel, Год журнала: 2025, Номер 387, С. 134456 - 134456

Опубликована: Янв. 21, 2025

Язык: Английский

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Co⁰ and CoO_x Nanoclusters Encapsulated in Carbon Microspheres for the Low‐Temperature Enhanced Reduction of NO_x by CO

Advanced Functional Materials, Год журнала: 2025, Номер unknown

Опубликована: Янв. 29, 2025

Abstract Efficient low‐temperature NO reduction by transition metal‐based catalysts remains a significant challenge. In this study, Co‐based catalyst, Co 0 +CoO x @CS, encapsulated carbon microspheres and synthesized via one‐step in situ hydrothermal method, exhibits excellent conversion, exceeding 99% at 150 °C. X‐ray Absorption Fine Structure analysis reveals electronic interactions between C Co, anchoring nanoclusters to the microspheres. The resulting microporous structure enhances reactant accessibility facilitates N─O bond cleavage. Furthermore, 13 O isotopic tracing experiments reveal that follows an ONNO pathway, which adsorbed CO induces dissociation of * ONN , weakly or gaseous promotes further decomposition N 2 . Specifically, species enhance adsorption, while CoO favor with oxygen vacancy‐mediated transfer driving catalytic cycle. This study presents novel approach for preparing offers effective strategy efficient reduction.

Язык: Английский

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Preparation, composition, catalytic properties of MFI-type zeolite solid solutions Hx[Al3+x Ti4+ySi4+12−x-yO24] with Al (x < 0.06) and Ti (y < 0.13) content

Journal of Porous Materials, Год журнала: 2025, Номер unknown

Опубликована: Фев. 6, 2025

Язык: Английский

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Progress in Catalytic Strategies for Mitigating NOx/N2O Emissions: From Mechanisms to Applications

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

Опубликована: Янв. 1, 2025

In the context of global warming, emission greenhouse gas nitrous oxide (N 2 O) is an important factor limiting application ammonia fuels in marine and offshore power.

Язык: Английский

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Unveiling Zeolite Confinement Effects on N₂O Decomposition Reaction over [Cu₂(μ-O)]²⁺ Active Sites

Industrial & Engineering Chemistry Research, Год журнала: 2025, Номер unknown

Опубликована: Фев. 25, 2025

Язык: Английский

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Strategies for effective nitrous oxide capture: From materials to mechanisms

Coordination Chemistry Reviews, Год журнала: 2025, Номер 535, С. 216627 - 216627

Опубликована: Март 17, 2025

Язык: Английский

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