Asymmetric Pt₁O₄–O_v Dual Active Sites Induced by NbO_x Clusters Promotes CO Synergistical Oxidation

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

Опубликована: Янв. 23, 2025

Pt/CeO2 single-atom catalysts are attractive materials for CO oxidation but normally show poor activity below 150 °C mainly due to the unicity of originally symmetric Pt1O4 structure. In this work, a highly active and stable Pt1/CeO2 single-site catalyst with only 0.1 wt % Pt loading, achieving satisfied complete conversion at °C, can be obtained through fabricating asymmetric Pt1O4-oxygen vacancies (Ov) dual-active sites induced by well-dispersed NbOx clusters. Specifically, formation new Ce–O–Nb interactions weakened strength original Pt–O–Ce bond, thus transferring near-perfect square-planar into distorted one, along forming abundant Ov around site. Hence, promoted activation on structure facilitated dissociation O2 neighboring site synergistically improved catalytic performance. The fabrication such Pt1O4–Ov double-active was also other typical hydrocarbons pollutants as C7H8 C3H6 from exhaust gases, shedding light engineering high-efficiency Pt-based low-temperature environmental catalysis.

Язык: Английский

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Sensitivity of phosphorus introduction stage to the catalytic activity of CeO2/TiO2 catalysts for selective catalytic reduction of NO with NH3

Applied Surface Science, Год журнала: 2025, Номер unknown, С. 163075 - 163075

Опубликована: Март 1, 2025

Язык: Английский

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Kaolin-derived ZSM-5 Zeolite Encapsulated with Ultra-low Loading of Pt Catalysts for Synergetic Hydrocarbon Adsorption/Oxidation Application

Microporous and Mesoporous Materials, Год журнала: 2025, Номер unknown, С. 113489 - 113489

Опубликована: Янв. 1, 2025

Язык: Английский

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Enhanced Water Activation via Alkali Metal-Modified Pd Clusters: A Key to Boosting HCHO and CO Oxidation

ACS Catalysis, Год журнала: 2025, Номер unknown, С. 5103 - 5112

Опубликована: Март 11, 2025

Язык: Английский

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Construction of Electron-Enriched Pt^δ+ with Reactive Oxygen Species for Enhanced Propane Catalytic Combustion

ACS Applied Materials & Interfaces, Год журнала: 2025, Номер unknown

Опубликована: Март 25, 2025

The complete catalytic oxidation of propane (C3H8) at low temperatures remains challenging due to the competitive adsorption between O2 and C3H8 molecules. In this study, we propose an innovative approach enhance by strategically designing active Ptδ+ sites with modulated electronic structures on F-doped TiO2-supported Pt catalyst (Pt/F-TiO2), which exhibits 50 90% conversion 200 320 °C. Our mechanistic study reveals that electron coupling 5d F 2p alters d orbital property, leads generation abundant efficient electron-enriched species. These new facilitate promote activation chemisorbed into superoxide species, in form bridge Pt-(O–O)ad-Ti, synergistically facilitates methyl C–H cleavage C3H8. This presents strategy for structure engineering Pt-based catalysts, paving way development high-performance catalysts oxidation.

Язык: Английский

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Density Regulation of Surface Hydroxyl on Porous Carbons as Efficient Catalytic Supports

Carbon, Год журнала: 2025, Номер unknown, С. 120469 - 120469

Опубликована: Май 1, 2025

Язык: Английский

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