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Related Concept Videos

Catalysis02:50

Catalysis

26.8K
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.
26.8K
Reduction of Alkenes: Catalytic Hydrogenation02:13

Reduction of Alkenes: Catalytic Hydrogenation

12.0K
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...
12.0K
Oxidation of Alkenes: Syn Dihydroxylation with Osmium Tetraoxide02:44

Oxidation of Alkenes: Syn Dihydroxylation with Osmium Tetraoxide

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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.
10.1K
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...
3.3K
Olefin Metathesis Polymerization: Overview01:13

Olefin Metathesis Polymerization: Overview

2.1K
Recently, the development of olefin metathesis polymerization advanced the field of polymer synthesis. Simply put, the reorganization of substituents on their double bonds between two olefins in the presence of a catalyst is known as the olefin metathesis reaction. The use of metathesis reaction for polymer synthesis is called olefin metathesis polymerization.
Ruthenium-based Grubbs catalyst is the most commonly used catalyst for olefin metathesis polymerization. Grubbs catalyst consists...
2.1K
Oxidation of Alkenes: Anti Dihydroxylation with Peroxy Acids02:04

Oxidation of Alkenes: Anti Dihydroxylation with Peroxy Acids

5.7K
Diols are compounds with two hydroxyl groups. In addition to syn dihydroxylation, diols can also be synthesized through the process of anti dihydroxylation. The process involves treating an alkene with a peroxycarboxylic acid to form an epoxide. Epoxides are highly strained three-membered rings with oxygen and two carbons occupying the corners of an equilateral triangle. This step is followed by ring-opening of the epoxide in the presence of an aqueous acid to give a trans diol.
5.7K

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Related Experiment Video

Updated: Jun 22, 2025

Synthesis and Testing of Supported Pt-Cu Solid Solution Nanoparticle Catalysts for Propane Dehydrogenation
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Synthesis and Testing of Supported Pt-Cu Solid Solution Nanoparticle Catalysts for Propane Dehydrogenation

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Robust Ru/Ce@Co Catalyst with an Optimized Support Structure for Propane Oxidation.

Aiyong Wang1, Jiajia Ding1, Mingqi Li1

  • 1State Key Laboratory of Green Chemical Engineering and Industrial Catalysis, Research Institute of Industrial Catalysis, School of Chemistry and Molecular Engineering, East China University of Science and Technology, Shanghai 200237, P. R. China.

Environmental Science & Technology
|July 3, 2024
PubMed
Summary
This summary is machine-generated.

A novel Ru/Ce@Co catalyst effectively oxidizes propane, a volatile organic compound (VOC), with enhanced stability. This structured catalyst overcomes challenges in short-chain alkane combustion for industrial applications.

Keywords:
cerium oxideoxidation mechanismpropane oxidationruthenium catalystsupport effect

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Heterogeneous Removal of Water-Soluble Ruthenium Olefin Metathesis Catalyst from Aqueous Media Via Host-Guest Interaction
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Heterogeneous Removal of Water-Soluble Ruthenium Olefin Metathesis Catalyst from Aqueous Media Via Host-Guest Interaction

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Tuning the Acidity of Pt/ CNTs Catalysts for Hydrodeoxygenation of Diphenyl Ether
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Tuning the Acidity of Pt/ CNTs Catalysts for Hydrodeoxygenation of Diphenyl Ether

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Synthesis and Testing of Supported Pt-Cu Solid Solution Nanoparticle Catalysts for Propane Dehydrogenation
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Heterogeneous Removal of Water-Soluble Ruthenium Olefin Metathesis Catalyst from Aqueous Media Via Host-Guest Interaction
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Heterogeneous Removal of Water-Soluble Ruthenium Olefin Metathesis Catalyst from Aqueous Media Via Host-Guest Interaction

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Tuning the Acidity of Pt/ CNTs Catalysts for Hydrodeoxygenation of Diphenyl Ether
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Area of Science:

  • Catalysis
  • Materials Science
  • Environmental Chemistry

Background:

  • Short-chain alkanes, like propane, are challenging to catalytically oxidize due to their stability and low polarity.
  • Ruthenium-based catalysts show high activity but suffer from deactivation via oxidation and sintering of active RuO2 species.
  • Industrial application of propane oxidation catalysts is hindered by poor long-term stability.

Purpose of the Study:

  • To develop a highly active and stable catalyst for propane oxidation.
  • To investigate a novel structured catalyst that prevents deactivation of active ruthenium species.
  • To enhance the catalytic combustion of short-chain alkanes, including volatile organic compounds (VOCs).

Main Methods:

  • Synthesis of a unique Ru/Ce@Co catalyst with cerium dioxide (CeO2) as a thin layer on Co3O4, and ruthenium (Ru) nanoparticles dispersed on CeO2.
  • Comparative catalytic oxidation tests of propane over Ru/Ce@Co, Ru/CeO2, and Ru/Co3O4 catalysts.
  • Evaluation of catalyst performance under various harsh conditions including reaction recycling, high space velocity, moisture, and high temperatures.

Main Results:

  • The Ru/Ce@Co catalyst exhibited superior catalytic activity and stability for propane oxidation compared to Ru/CeO2 and Ru/Co3O4.
  • The catalyst maintained excellent performance even under severe operating conditions, demonstrating robustness.
  • The specific structure facilitated strong anchoring of Ru species on CeO2, maintaining a low-valent state and enhancing propane and oxygen adsorption/activation.

Conclusions:

  • The designed Ru/Ce@Co catalyst offers a novel and effective strategy for high-efficiency catalytic combustion of short-chain alkanes.
  • The unique nanostructure enhances the stability and activity of ruthenium species, overcoming previous limitations.
  • This approach holds significant potential for industrial applications in VOC abatement and energy conversion.