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Related Concept Videos

Heterogeneous Catalysis01:22

Heterogeneous Catalysis

129
Heterogeneous catalysis involves a catalyst in a different phase from the reactants. It is a process where the catalyst and the reactants are in distinct phases, typically solid and gas or liquid.Most heterogeneous catalysts are metals, metal oxides, or acids. The list includes transition metals like iron (Fe), cobalt (Co), nickel (Ni), palladium (Pd), platinum (Pt), chromium (Cr), manganese (Mn), tungsten (W), silver (Ag), and copper (Cu). These metals possess partially vacant d orbitals that...
129
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

32.6K
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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Radical Oxidation of Allylic and Benzylic Alcohols01:21

Radical Oxidation of Allylic and Benzylic Alcohols

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Activated manganese(IV) oxide can selectively oxidize allylic and benzylic alcohols via a radical intermediate mechanism. Primary allylic alcohols are oxidized to aldehydes, while secondary allylic alcohols yield ketones. The redox reaction of potassium permanganate with an Mn(II) salt such as manganese sulfate (under either alkaline or acidic conditions), followed by thorough drying, yields the oxidizing agent: activated MnO2. While MnO2 is insoluble in the solvents used for the reaction, the...
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Olefin Metathesis Polymerization: Overview01:13

Olefin Metathesis Polymerization: Overview

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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 of a...
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Related Experiment Video

Updated: Apr 16, 2026

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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Highly efficient binuclear ruthenium catalyst for water oxidation.

Anett C Sander1, Somnath Maji2, Laia Francàs2

  • 1Institute of Inorganic Chemistry, Georg-August-University Göttingen, Tammannstraße 4, 37077 Göttingen (Germany) www.meyer.chemie.uni-goettingen.de.

Chemsuschem
|March 3, 2015
PubMed
Summary
This summary is machine-generated.

Researchers developed a novel diruthenium complex catalyst that significantly enhances water oxidation for renewable energy. This catalyst shows the highest activity reported for binuclear systems, advancing solar fuel production.

Keywords:
artificial photosynthesisbinuclear complexesoxygen evolving complexrutheniumwater oxidation catalysis

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The Synthesis, Characterization and Reactivity of a Series of Ruthenium N-triphosPh Complexes
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Multiscale Sampling of a Heterogeneous Water/Metal Catalyst Interface using Density Functional Theory and Force-Field Molecular Dynamics
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Area of Science:

  • Catalysis
  • Renewable Energy
  • Photochemistry

Background:

  • Water splitting is crucial for converting solar energy into chemical fuels like dihydrogen.
  • Efficient catalysts for the water oxidation reaction (generating dioxygen) are essential but challenging to develop.
  • Existing catalysts often lack the required ruggedness and efficiency for practical applications.

Purpose of the Study:

  • To design and synthesize a novel, highly active catalyst for water oxidation.
  • To investigate the structural and electronic properties of the new catalyst.
  • To evaluate the catalytic performance of the diruthenium complex in water oxidation.

Main Methods:

  • Single-crystal X-ray diffraction for structural analysis.
  • Redox titrations and spectroelectrochemistry for electronic characterization.
  • Water oxidation mediated by chemical oxidants (Ce(IV)) and electrochemistry, with dioxygen monitoring via manometry and Clark electrode.

Main Results:

  • A rationally designed pyrazolate-based diruthenium complex with unprecedented activity for binuclear water oxidation catalysts was synthesized.
  • X-ray diffraction revealed optimal metal ion preorganization for binding water molecules.
  • The complex exhibited low oxidation potentials due to its trianionic pyrazolate ligand.
  • Impressive catalytic activity was observed in both chemical and electrochemical water oxidation.

Conclusions:

  • The new diruthenium complex represents a significant advancement in water oxidation catalysis.
  • Its unique structure and electronic properties contribute to its high efficiency.
  • This catalyst holds promise for improving renewable energy technologies, particularly solar fuel generation.