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Reduction of Alkenes: Asymmetric Catalytic Hydrogenation02:17

Reduction of Alkenes: Asymmetric Catalytic Hydrogenation

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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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Catalysis02:50

Catalysis

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The presence of a catalyst affects the rate of a chemical reaction. A catalyst is a substance that can increase the reaction rate without being consumed during the process. A basic comprehension of a catalysts’ role during chemical reactions can be understood from the concept of reaction mechanisms and energy diagrams.
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相关实验视频

Updated: Sep 16, 2025

Synthesis and Catalytic Performance of Gold Intercalated in the Walls of Mesoporous Silica
11:02

Synthesis and Catalytic Performance of Gold Intercalated in the Walls of Mesoporous Silica

Published on: July 9, 2015

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在金基的单原子催化剂.

Silvia Picello1, Elisabetta Inico1, Clara Saetta1

  • 1Department of Materials Science, University of Milano-Bicocca, Via Cozzi 55, 20125 Milano, Italy.

ACS catalysis
|July 10, 2025
PubMed
概括
此摘要是机器生成的。

新的单原子催化剂 (SACs) 在新型二维黄金材料金烯上显示出对和氧进化反应的稳定性和反应性有希望,性能优于传统支.

关键词:
在 DFT 方面,它是最重要的.在这里,我们可以看到它.这是OER OER.这就是SAC SAC.黄金是一种黄金.

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In Situ SIMS and IR Spectroscopy of Well-defined Surfaces Prepared by Soft Landing of Mass-selected Ions

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相关实验视频

Last Updated: Sep 16, 2025

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Catalytic Reactions at Amine-Stabilized and Ligand-Free Platinum Nanoparticles Supported on Titania During Hydrogenation of Alkenes and Aldehydes
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科学领域:

  • 材料科学 材料科学 材料科学
  • 催化剂是一种催化剂.
  • 表面化学 表面化学

背景情况:

  • 单原子催化依赖于金属支相互作用的稳定性和反应性.
  • 像石墨烯这样的二维材料是常见的支物,单原子合金 (SAA) 引起了人们的注意.
  • 最近,Goldene是一种二维黄金单层,被合成为潜在的石墨烯模拟物.

研究的目的:

  • 探索单原子催化剂 (SACs),其中的过渡金属 (TM) 原子支在金上.
  • 为了研究这些TM-goldene系统的稳定性和催化性能.
  • 为了比较它们与散装黄金上的TMs的反应性(111).

主要方法:

  • 使用了电子结构计算.
  • 在还原和氧化条件下的稳定性被评估.
  • 评估了演化反应 (HER) 和氧演化反应 (OER) 的催化性能.

主要成果:

  • 在各种条件下确定了几个稳定的TM-goldene系统.
  • 某些TM-goldene系统显示出有前途的HER和OER活性.
  • 与散装Au上的TMs相比,反应性有显著的差异 111).

结论:

  • TM-金SAC提供了增强稳定性和催化反应性的潜力.
  • 这项研究为金作为一种新型支持材料提供了理论证据.
  • 这些发现表明了设计先进的单原子催化剂的新途径.