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Related Concept Videos

Heterogeneous Catalysis01:22

Heterogeneous Catalysis

134
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...
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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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Turnover Number and Catalytic Efficiency01:19

Turnover Number and Catalytic Efficiency

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The turnover number of an enzyme is the maximum number of substrate molecules it can transform per unit time. Turnover numbers for most enzymes range from 1 to 1000 molecules per second. Catalase has the known highest turnover number, capable of converting up to 2.8×106 molecules of hydrogen peroxide into water and oxygen per second. Lysozyme has the lowest known turnover number of half a molecule per second.
Chymotrypsin is a pancreatic enzyme that breaks down proteins during digestion....
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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.
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Oxidation of Alkenes: Syn Dihydroxylation with Potassium Permanganate02:21

Oxidation of Alkenes: Syn Dihydroxylation with Potassium Permanganate

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Alkenes can be dihydroxylated using potassium permanganate. The method encompasses the reaction of an alkene with a cold, dilute solution of potassium permanganate under basic conditions to form a cis-diol along with a brown precipitate of manganese dioxide.
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Properties of Organometallic Compounds01:23

Properties of Organometallic Compounds

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Organometallic compounds are compounds that contain a carbon–metal bond. Carbon belongs to an organyl group like alkyl, aryl, allyl, or benzyl groups. The metal can be from Group I or Group II of the periodic table, a transition metal, or a semimetal.
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Related Experiment Video

Updated: Apr 24, 2026

Synthesis of Metal Nanoparticles Supported on Carbon Nanotube with Doped Co and N Atoms and its Catalytic Applications in Hydrogen Production
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A new iron-based carbon monoxide oxidation catalyst: structure-activity correlation.

Roland Schoch1, Heming Huang, Volker Schünemann

  • 1Fakultät für Naturwissenschaften, Department Chemie, Universität Paderborn, Warburger Straße 100, 33098 Paderborn (Germany).

Chemphyschem : a European Journal of Chemical Physics and Physical Chemistry
|September 13, 2014
PubMed
Summary

A novel iron catalyst on γ-Al2O3 efficiently oxidizes carbon monoxide at low temperatures, offering a cost-effective alternative to precious metals. Optimal performance is achieved with lower catalyst loadings due to specific structural configurations.

Keywords:
Moessbauer spectroscopycoordination modesironoxidationstructure-activity relationships

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Area of Science:

  • Materials Science
  • Catalysis
  • Surface Chemistry

Background:

  • Precious metal catalysts are commonly used for carbon monoxide (CO) oxidation.
  • Developing cost-effective and efficient alternatives is crucial for industrial applications.
  • Iron-based catalysts present a promising avenue for CO oxidation.

Purpose of the Study:

  • To synthesize and characterize a novel iron-based catalyst for carbon monoxide oxidation.
  • To evaluate its catalytic performance as a substitute for precious-metal systems.
  • To identify the structural features responsible for high catalytic activity.

Main Methods:

  • Facile impregnation method using iron tris-acetylacetonate precursor on γ-Al2O3.
  • Characterization using X-ray diffraction (XRD), Brunauer-Emmett-Teller (BET) surface area analysis.
  • Mössbauer spectroscopy, diffuse reflectance UV/Vis, and X-ray absorption spectroscopy (XAS).

Main Results:

  • The iron-based catalyst achieved light-off temperatures as low as 235°C and full conversion at 278°C.
  • Catalytic activity was dependent on iron loading, with lower loadings exhibiting superior performance.
  • Characterization revealed isolated tetrahedrally coordinated Fe(3+) centers and AlFeO3 phases as key active structures.

Conclusions:

  • The synthesized iron-based catalyst is a viable, low-temperature alternative for CO oxidation.
  • Catalyst performance is strongly linked to the specific iron species and their coordination environment.
  • Isolated Fe(3+) and AlFeO3 phases are essential for high catalytic activity in CO oxidation.