A single site ruthenium catalyst for robust soot oxidation without platinum or palladium

Nature Communications, Год журнала: 2023, Номер 14(1)

Опубликована: Ноя. 6, 2023

Abstract The quest for efficient non-Pt/Pd catalysts has proved to be a formidable challenge auto-exhaust purification. Herein, we present an approach construct robust catalyst by embedding single-atom Ru sites onto the surface of CeO 2 through gas bubbling-assisted membrane deposition method. formed sites, which occupy lattice , can improve activation efficiency NO and O . Remarkably, 1 /CeO exhibits exceptional catalytic performance stability during carbon particle oxidation (soot), rivaling commercial Pt-based catalysts. turnover frequency (0.218 h −1 ) is nine-fold increase relative nanoparticle catalyst. We further show that strong interfacial charge transfer within atomically dispersed active site greatly enhances rate-determining step oxidation, resulting in substantial reduction apparent energy soot oxidation. represents toward reducing dependence on Pt/Pd-based

Язык: Английский

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Tunning Pd–Cu-based catalytic oxygen carrier for intensifying low-temperature methanol reforming

Journal of Cleaner Production, Год журнала: 2023, Номер 410, С. 137212 - 137212

Опубликована: Апрель 20, 2023

Язык: Английский

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A strong bimetal-support interaction in ethanol steam reforming

Nature Communications, Год журнала: 2023, Номер 14(1)

Опубликована: Июнь 2, 2023

The metal-support interaction (MSI) in heterogeneous catalysts plays a crucial role reforming reaction to produce renewable hydrogen, but conventional objects are limited single metal and support. Herein, we report type of RhNi/TiO2 with tunable RhNi-TiO2 strong bimetal-support (SBMSI) derived from structure topological transformation RhNiTi-layered double hydroxides (RhNiTi-LDHs) precursors. resulting 0.5RhNi/TiO2 catalyst (with 0.5 wt.% Rh) exhibits extraordinary catalytic performance toward ethanol steam (ESR) H2 yield 61.7%, production rate 12.2 L h-1 gcat-1 high operational stability (300 h), which is preponderant the state-of-the-art catalysts. By virtue synergistic catalysis multifunctional interface (Rh-Niδ--Ov-Ti3+; Ov denotes oxygen vacancy), generation formate intermediate (the rate-determining step ESR reaction) CO CHx significantly promoted on catalyst, accounting for its ultra-high production.

Язык: Английский

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Hydrogenolysis of Lignin Model Compounds on Ni Nanoparticles Surrounding the Oxygen Vacancy of CeO₂

ACS Catalysis, Год журнала: 2023, Номер 13(14), С. 9577 - 9587

Опубликована: Июль 6, 2023

The cleavage of C–O bonds presents the crucial step for realizing depolymerization lignin. Herein, we report that Ni nanoparticles (NiNPs) supported on CeO2 with oxygen vacancies (Ov) show high activity and selectivity in hydrogenolysis diphenyl ether (DPE, a lignin model compound), while single-site (SSNi) is nearly inactive reaction. Temperature-programmed desorption (TPD) demonstrates both DPE H2 can be adsorbed activated NiNPs. Density functional theory (DFT) calculation further indicates NiNPs are more reactive because Ov at interface between greatly enhance adsorption DPE, but no SSNi was observed. It identified atoms neighboring catalytic sites Ni/CeO2 catalyst efficient compounds. This work highlights act as active rupturing models, which conducive to rational design metal-supported catalysts, especially biomass conversion.

Язык: Английский

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Role of H₂O in Catalytic Conversion of C₁ Molecules

Journal of the American Chemical Society, Год журнала: 2024, Номер 146(5), С. 2857 - 2875

Опубликована: Янв. 24, 2024

Due to their role in controlling global climate change, the selective conversion of C

Язык: Английский

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Recent Advances in Methanol Steam Reforming Catalysts for Hydrogen Production

Catalysts, Год журнала: 2025, Номер 15(1), С. 36 - 36

Опубликована: Янв. 3, 2025

The pursuit of carbon neutrality has accelerated advancements in sustainable hydrogen production and storage methods, increasing the importance methanol steam reforming (MSR) technology. Catalysts are central to MSR technology primarily classified into copper-based noble metal-based catalysts. This review begins with an examination active components these catalysts, tracing evolution understanding sites over past four decades. It then explores roles various supports promoters, along mechanisms catalyst deactivation. To address diverse perspectives on reaction mechanism, existing research is systematically organized synthesized, providing a detailed account associated both types. discussion concludes forward-looking perspective development, emphasizing strategies such as anti-sintering methods for approaches reduce byproduct formation palladium-based comprehensive methodologies mechanisms, efforts enhance atomic utilization efficiency.

Язык: Английский

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Modern Technologies of Hydrogen Production

Processes, Год журнала: 2022, Номер 11(1), С. 56 - 56

Опубликована: Дек. 26, 2022

Transitioning to energy-saving and renewable energy sources is impossible without accelerated development of hydrogen technologies. This review summarizes the state-of-the-art recent advances various production processes, including but not limited thermochemical electrolytic processes. Their opportunities limitations, operating conditions, catalysts are discussed. Nowadays, most still produced by steam reforming methane, its partial oxidation, or coal gasification. Considerable attention also paid natural gas pyrolysis. However, using these technologies has a lot impurities needs additional purification. A series for purification, filtration through palladium alloy membranes, membrane catalysis, allowing purification in one stage, The main way produce carbon-free water electrolysis low-cost from nuclear sources. Both conventional novel methods storage transportation, which an important part economy, reviewed. Biohydrogen Finally, prospects further work this field provided. will be useful researchers manufacturers working field.

Язык: Английский

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Highly active and durable nitrogen-doped CoP/CeO2 nanowire heterostructures for overall water splitting

Chemical Engineering Journal, Год журнала: 2022, Номер 460, С. 141119 - 141119

Опубликована: Дек. 21, 2022

Язык: Английский

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A novel multi-walled carbon nanotube-coupled CoNi MOF composite enhances the oxygen evolution reaction through synergistic effects

Journal of Materials Chemistry A, Год журнала: 2022, Номер 10(9), С. 4936 - 4943

Опубликована: Янв. 1, 2022

A multi-walled carbon nanotubes (mCNTs)-coupled CoNi MOF composite was synthesized via a solvothermal method using mCNTs as shape-directing agent and its application towards the oxygen evolution reaction (OER) investigated in alkaline solution.

Язык: Английский

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Maximizing the synergistic effect between Pt0 and Ptδ+ in a confined Pt-based catalyst for durable hydrogen production

Applied Catalysis B Environment and Energy, Год журнала: 2022, Номер 316, С. 121669 - 121669

Опубликована: Июнь 28, 2022

Язык: Английский

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