Nickel phyllosilicate derived metal–acid bifunctional Ni/SiO2 catalysts for selective reductive amination of alcohols

Applied Catalysis A General, Год журнала: 2025, Номер unknown, С. 120310 - 120310

Опубликована: Апрель 1, 2025

Язык: Английский

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The Acquisition of Primary Amines from Alcohols through Reductive Amination over Heterogeneous Catalysts

Catalysts, Год журнала: 2023, Номер 13(10), С. 1350 - 1350

Опубликована: Окт. 7, 2023

The synthesis of primary amines via the reductive amination alcohols involves a hydrogen-borrowing or hydrogen-transfer mechanism, which consists three main steps: alcohol hydroxyl dehydrogenation, carbonyl imidization, and imine hydrogenation. Heterogeneous catalysts are widely used for this reaction because their high performance amenability to separation reuse. However, efficiency is limited by dehydrogenation step, severely affected competitive adsorption NH3. We hope improve increasing efficiency. Therefore, in overview, we introduce research progress catalyzed heterogeneous metal catalysts, focusing on methods enhancing screening component acidity/alkalinity support. Finally, propose some new strategies preparation from perspective overcoming NH3 speculate design novel with future.

Язык: Английский

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Influence of the preparation method on Ni/SiO₂ catalysts for selective hydrogenation of succinic anhydride to γ-butyrolactone

Catalysis Science & Technology, Год журнала: 2024, Номер 14(14), С. 3936 - 3944

Опубликована: Янв. 1, 2024

Highly selective hydrogenation of succinic anhydride (SAA) to γ-butyrolactone (GBL) over Ni/SiO 2 catalyst.

Язык: Английский

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Effect of the Nature of Ni Species on Hydrogenation of 1,4‐Butynediol over Ni/SiO₂ Catalysts

ChemCatChem, Год журнала: 2024, Номер 16(21)

Опубликована: Июль 16, 2024

Abstract The catalytic performance of liquid‐phase hydrogenation 1,4‐butynediol (BYD) to 1,4‐butanediol (BDO) was studied on silica‐supported Ni catalysts prepared by impregnation, sol‐gel, and ammonia evaporation methods, respectively. Due the formation nickel phyllosilicate, species in Ni/SiO 2 ‐AE catalyst is difficult reduce at 450 °C, resulting fewer 0 active sites poor activity. As for impregnated ‐IM, its particles are prone aggregate seriously due their weak interaction with support which may be not conducive hydrogenation. On contrary, introduced sol‐gel method can homogenously embedded amorphous silica intersecting network structure high metal dispersion well physical confinement effect, greatly promotes BYD obtain BDO super selectivity.

Язык: Английский

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Employing Ammonia for the Synthesis of Primary Amines: Recent Achievements over Heterogeneous Catalysts

ChemSusChem, Год журнала: 2024, Номер unknown

Опубликована: Авг. 27, 2024

Primary amines represent highly privileged chemicals for synthesis of polymers, pharmaceuticals, agrochemicals, coatings, etc. Consequently, the development efficient and green methodologies production primary are great importance in chemical industry. Owing to advantages low cost ease availability, ammonia is considered as a feasible nitrogen source N-containing compounds. Thus, transformation into has received much attention. In this review, commonly applied synthetic routes produce from were summarized, including reductive amination carbonyl compounds, hydrogen transfer alcohols, hydroamination olefins arylation with ammonia, which catalytic performance recent heterogeneous catalysts discussed. Additionally, various strategies modulate surface properties outlined conjunction analysis reaction mechanism. Particularly, biomass-derived substrates highlighted, could provide competitive industry stimulate sustainable catalysis future. Ultimately, perspectives challenges opportunities N-resource

Язык: Английский

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Renewable Zn/S-1 catalyst with dual active sites for acetylene acetoxylation

Microporous and Mesoporous Materials, Год журнала: 2024, Номер 381, С. 113333 - 113333

Опубликована: Сен. 11, 2024

Язык: Английский

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