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Updated: May 30, 2025

Catalytic Reactions at Amine-Stabilized and Ligand-Free Platinum Nanoparticles Supported on Titania During Hydrogenation of Alkenes and Aldehydes
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Published on: June 24, 2022

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构建SiO2-支持的原子分散催化剂,具有单原子和原子双站点,以服化性能

Hao Xu1,2, Dong Lin3, Jie Shi4

  • 1School of Chemistry and Chemical Engineering, Northwestern Polytechnical University, Xi'an 710072, China.

JACS Au
|January 31, 2025
PubMed
概括

在二氧化 (SiO2) 上原子分散的 (Pt) 是使用一种新方法创建的. 这种双站点催化剂显著改善了选择性化,展示了协同活性站点的力量.

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Catalytic hydrogenation of alkenes is a transition-metal catalyzed reduction of the double bond using molecular hydrogen to give alkanes. The mode of hydrogen addition follows syn stereochemistry.
The metal catalyst used can be either heterogeneous or homogeneous. When hydrogenation of an alkene generates a chiral center, a pair of enantiomeric products is expected to form. However, an enantiomeric excess of one of the products can be facilitated using an enantioselective reaction or an...
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Alkenes undergo reduction by the addition of molecular hydrogen to give alkanes. Because the process generally occurs in the presence of a transition-metal catalyst, the reaction is called catalytic hydrogenation.
Metals like palladium, platinum, and nickel are commonly used in their solid forms — fine powder on an inert surface. As these catalysts remain insoluble in the reaction mixture, they are referred to as heterogeneous catalysts.
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Alkenes are converted to 1,2-diols or glycols through a process called dihydroxylation. It involves the addition of two hydroxyl groups across the double bond with two different stereochemical approaches, namely anti and syn. Dihydroxylation using osmium tetroxide progresses with syn stereochemistry.
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