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Updated: Oct 2, 2025

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嵌入在半孔结构中的控制尺寸的纳米颗粒,导致聚烯的高效和选择性解

Xun Wu1,2, Akalanka Tennakoon1,2, Ryan Yappert3

  • 1US DOE, Ames Laboratory, Iowa State University, Ames, Iowa 50011, United States.

Journal of the American Chemical Society
|February 23, 2022
PubMed
概括

纳米颗粒大小显著影响聚乙烯解活性,较小的纳米颗粒具有更高的催化率. 然而,中孔结构决定了产品的选择性,为催化剂提供了新的设计策略.

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Reduction of Alkenes: Catalytic Hydrogenation02:13

Reduction of Alkenes: Catalytic Hydrogenation

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.
The hydrogenation process takes place on the...
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Reduction of Alkenes: Asymmetric Catalytic Hydrogenation

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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