Related Experiment Video
Updated: Jul 8, 2025
10:39
Heterogeneous Removal of Water-Soluble Ruthenium Olefin Metathesis Catalyst from Aqueous Media Via Host-Guest Interaction
Published on: August 23, 2018
7.9K
Microenvironment Modulation of Single-Atom Ru in ZrSBA-15 for CO2 Hydrogenation to Formic Acid
Encheng Liu1, Zhenzhen Wang1, Zhonghua Sun1
1Jiangsu Key Laboratory of Advanced Catalytic Materials and Technology, Advanced Catalysis and Green Manufacturing Collaborative Innovation Center, Changzhou University, Changzhou 213164, Jiangsu, China.
Inorganic Chemistry
|December 13, 2023
Summary
Organic amine modification of single-atom ruthenium catalysts on ZrSBA-15 enhances CO2 hydrogenation to formic acid. The -NH2 functionalized catalyst showed superior performance, demonstrating effective microenvironment control for catalysis.
Area of Science:
- Materials Science
- Catalysis
- Chemical Engineering
Background:
- Modulating the chemical microenvironment of active sites is crucial for improving catalytic performance.
- Single-atom catalysts offer high efficiency and selectivity but require careful design of their support materials.
- CO2 hydrogenation to formic acid is an important reaction for carbon utilization and sustainable chemistry.
Purpose of the Study:
- To synthesize and investigate single-atom ruthenium (Ru) catalysts supported on ZrSBA-15 modified with organic amine groups.
- To evaluate the catalytic performance of these modified catalysts for CO2 hydrogenation to formic acid (FA) under mild conditions.
- To understand the role of organic functional groups in tuning the catalyst's microenvironment and activity.
Main Methods:
- Fabrication of single-atom Ru anchored on ZrSBA-15 functionalized with various organic amine groups.
- Catalytic testing of CO2 hydrogenation to FA using the synthesized materials under mild conditions.
- Characterization of the catalysts (e.g., electronic state, adsorption capacity, hydrophilicity/hydrophobicity) and analysis of experimental results.
Main Results:
- The organic amine modification was essential for achieving CO2 hydrogenation to FA.
- The Ru catalyst supported on ZrSBA-15 bearing amine (-NH2) groups exhibited the highest catalytic activity.
- The optimal catalyst achieved a turnover number (TON) of 505 and a turnover frequency (TOF) of 64 h-1.
- Functional groups influenced reactant adsorption, the electronic state of Ru, and material hydrophilicity/hydrophobicity.
Conclusions:
- Organic amine functionalization of ZrSBA-15 effectively modulates the microenvironment around single-atom Ru sites.
- The -NH2 functional group significantly enhances catalytic performance for CO2 hydrogenation to FA.
- This study highlights the importance of tailored catalyst design for efficient and selective CO2 conversion.
More Related Videos
Related Concept Videos
02:17Reduction of Alkenes: Asymmetric Catalytic Hydrogenation
3.3K
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...
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
02:13Reduction of Alkenes: Catalytic Hydrogenation
12.1K
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...
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...
12.1K
01:28Reduction of Benzene to Cyclohexane: Catalytic Hydrogenation
4.6K
Unlike the easy catalytic hydrogenation of an alkene double bond, hydrogenation of a benzene double bond under similar reaction conditions does not take place easily. For example, in the reduction of stilbene, the benzene ring remains unaffected while the alkene bond gets reduced. Hydrogenation of an alkene double bond is exothermic and a favorable process. In contrast, to hydrogenate the first unsaturated bond of benzene, an energy input is needed; that is, the process is endothermic. This is...
4.6K
02:36Regioselectivity and Stereochemistry of Hydroboration
8.2K
A significant aspect of hydroboration–oxidation is the regio- and stereochemical outcome of the reaction.
Hydroboration proceeds in a concerted fashion with the attack of borane on the π bond, giving a cyclic four-centered transition state. The –BH2 group is bonded to the less substituted carbon and –H to the more substituted carbon. The concerted nature requires the simultaneous addition of –H and –BH2 across the same face of the alkene giving syn...
Hydroboration proceeds in a concerted fashion with the attack of borane on the π bond, giving a cyclic four-centered transition state. The –BH2 group is bonded to the less substituted carbon and –H to the more substituted carbon. The concerted nature requires the simultaneous addition of –H and –BH2 across the same face of the alkene giving syn...
8.2K
02:24Reduction of Alkynes to cis-Alkenes: Catalytic Hydrogenation
7.7K
Introduction
Like alkenes, alkynes can be reduced to alkanes in the presence of transition metal catalysts such as Pt, Pd, or Ni. The reaction involves two sequential syn additions of hydrogen via a cis-alkene intermediate.
Like alkenes, alkynes can be reduced to alkanes in the presence of transition metal catalysts such as Pt, Pd, or Ni. The reaction involves two sequential syn additions of hydrogen via a cis-alkene intermediate.
7.7K
02:50Catalysis
27.0K
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.
27.0K