Dynamic trap of Ni at elevated temperature for yielding high-efficiency methane dry reforming catalyst

Applied Catalysis B Environment and Energy, Год журнала: 2024, Номер 346, С. 123728 - 123728

Опубликована: Янв. 13, 2024

Язык: Английский

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Water-assisted oxidative redispersion of Cu particles through formation of Cu hydroxide at room temperature

Nature Communications, Год журнала: 2024, Номер 15(1)

Опубликована: Апрель 8, 2024

Abstract Sintering of active metal species often happens during catalytic reactions, which requires redispersion in a reactive atmosphere at elevated temperatures to recover the activity. Herein, we report simple method redisperse sintered Cu catalysts via O 2 -H treatment room temperature. In-situ spectroscopic characterizations reveal that H induces formation hydroxylated humid , pushing surface diffusion atoms Further, OH groups formed on most hydroxylable support surfaces such as γ-Al 3 SiO and CeO help pull mobile enhance redispersion. Both pulling effects gaseous promote structural transformation aggregates into highly dispersed temperature, exhibit enhanced activity reverse water gas shift preferential oxidation carbon monoxide reactions. These findings highlight important role dynamic structure evolution supported nanocatalysts lay foundation for regeneration under mild conditions.

Язык: Английский

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Reverse water gas-shift reaction product driven dynamic activation of molybdenum nitride catalyst surface

Nature Communications, Год журнала: 2024, Номер 15(1)

Опубликована: Апрель 10, 2024

In heterogeneous catalysis catalyst activation is often observed during the reaction process, which mostly attributed to induction by reactants. this work we report that surface structure of molybdenum nitride (MoN

Язык: Английский

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Suppressing Metal Leaching and Sintering in Hydroformylation Reaction by Modulating the Coordination of Rh Single Atoms with Reactants

Journal of the American Chemical Society, Год журнала: 2024, Номер 146(17), С. 11955 - 11967

Опубликована: Апрель 19, 2024

Hydroformylation reaction is one of the largest homogeneously catalyzed industrial processes yet suffers from difficulty and high cost in catalyst separation recovery. Heterogeneous single-atom catalysts (SACs), on other hand, have emerged as a promising alternative due to their initial activity reasonable regioselectivity. Nevertheless, stability SACs against metal aggregation leaching during has rarely been addressed. Herein, we elucidate mechanism Rh by investigating structural evolution

Язык: Английский

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Constructing morphologically stable supported noble metal catalysts in heterogeneous catalysis: Mechanisms and strategies

Nano Energy, Год журнала: 2024, Номер 129, С. 109975 - 109975

Опубликована: Июль 9, 2024

Язык: Английский

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Genetic forms of tauopathies: inherited causes and implications of Alzheimer’s disease-like TAU pathology in primary and secondary tauopathies

Journal of Neurology, Год журнала: 2024, Номер 271(6), С. 2992 - 3018

Опубликована: Март 30, 2024

Abstract Tauopathies are a heterogeneous group of neurologic diseases characterized by pathological axodendritic distribution, ectopic expression, and/or phosphorylation and aggregation the microtubule-associated protein TAU, encoded gene MAPT . Neuronal dysfunction, dementia, neurodegeneration common features these often detrimental diseases. A neurodegenerative disease is considered primary tauopathy when mutations/haplotypes its cause TAU main feature. In case pathology observed but superimposed another hallmark, condition classified as secondary tauopathy. some tauopathies (e.g. -associated frontotemporal dementia (FTD), progressive supranuclear palsy (PSP), corticobasal degeneration (CBD), Alzheimer's (AD)) recognized significant pathogenic driver disease. many tauopathies, including Parkinson's (PD) Huntington's (HD), suggested to contribute development in others Niemann-Pick (NPC)) may only be bystander. The genetic mechanisms underlying not fully understood. this review, predispositions variants associated with both examined detail, assessing evidence for role conditions. We highlight less forms increase awareness disorders involvement their pathology. This approach contributes deeper understanding conditions also lay groundwork potential TAU-based therapeutic interventions various tauopathies.

Язык: Английский

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Sub-2 nm Ternary Metallic Alloy Encapsulated within Montmorillonite Interlayers for Efficient Hydrogen Generation from Ammonia Borane Hydrolysis

ACS Catalysis, Год журнала: 2024, Номер unknown, С. 14665 - 14677

Опубликована: Сен. 18, 2024

Язык: Английский

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Silanol-Stabilized Atomically Dispersed Pt^δ+-O_x-Sn Active Sites in Protozeolite for Propane Dehydrogenation

Journal of the American Chemical Society, Год журнала: 2024, Номер 146(35), С. 24358 - 24367

Опубликована: Авг. 21, 2024

Crystalline zeolites have been proven to be excellent supports for confining subnanometric metal catalysts boost the propane dehydrogenation (PDH) reaction. However, introduced metallic species may suffer from severe sintering and limited stability during catalytic process, especially when utilizing an industrial impregnation method incorporation. In this study, we developed a new type of support based on amorphous protozeolite (PZ), taking advantage its adjustable silanol chemistry zeolitic microporous characteristic stabilizing atomically dispersed PtSn catalyst via simple, cost-effective coimpregnation process. The combination X-ray absorption spectroscopy, photoelectron in situ diffuse reflectance infrared Fourier transform spectroscopy under CO atmosphere, density functional theory calculations confirmed formation highly active Ptδ+-Ox-Sn PtSn/PZ. PtSn/PZ exhibited high conversion 45.4% propylene selectivity 99% (WHSV= 3.6 h–1, 550 °C), with apparent rate coefficient 565 molC3H6·gPt–1·h–1·bar–1 at WHSV 108 presenting top-level performance among state-of-the-art Pt-based prepared by synthesis methods. determined chemical state species, showing change sites alloy decreasing supports. This work provides general strategy using silanol-rich as various simple also offers effective way fine tailoring silanol-engineered approach.

Язык: Английский

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Strong-weak dual interface engineered electrocatalyst for large current density hydrogen evolution reaction

Communications Materials, Год журнала: 2025, Номер 6(1)

Опубликована: Янв. 18, 2025

Abstract Supported nanocatalysts are crucial for hydrogen production, yet their activity and stability challenging to manage due complex metal-support interfaces. Herein, we design Pt@ anatase&rutile-TiO 2 with a strong-weak dual interface by modifying TiO using high-energy ball milling in-situ reduction vary surface energies. Experiments density functional theory calculations reveal that the strong Pt-anatase enhances adsorption. In contrast, weak Pt-rutile facilitates desorption, simultaneously preventing Pt agglomeration increasing reaction rate. As result, tailored catalyst has 529.3 mV overpotential at 1000 mA cm −2 in 0.5 M H SO 4 , 0.69 times less than commercial Pt/C. It also possesses 8.8 mass of Pt/C maintains low after 2000 cyclic voltammetry cycles, suggesting high stability. This engineering strategy shows potential overall water splitting proton exchange membrane electrolyzer, advancing efficient supported nanocatalysts.

Язык: Английский

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Carbon doped cobalt nanoparticles encapsulated in graphitic carbon shells: Efficient bifunctional oxygen electrocatalysts for ultrastable Zn-air batteries

Journal of Colloid and Interface Science, Год журнала: 2025, Номер 686, С. 624 - 633

Опубликована: Фев. 1, 2025

Язык: Английский

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