Jove
Visualize
Contact Us
JoVE
x logofacebook logolinkedin logoyoutube logo
ABOUT JoVE
OverviewLeadershipBlogJoVE Help Center
AUTHORS
Publishing ProcessEditorial BoardScope & PoliciesPeer ReviewFAQSubmit
LIBRARIANS
TestimonialsSubscriptionsAccessResourcesLibrary Advisory BoardFAQ
RESEARCH
JoVE JournalMethods CollectionsJoVE Encyclopedia of ExperimentsArchive
EDUCATION
JoVE CoreJoVE BusinessJoVE Science EducationJoVE Lab ManualFaculty Resource CenterFaculty Site
Terms & Conditions of Use
Privacy Policy
Policies

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
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.
32.6K
Introduction to Mechanisms of Enzyme Catalysis01:13

Introduction to Mechanisms of Enzyme Catalysis

11.7K
For many years, scientists thought that enzyme-substrate binding took place in a simple "lock-and-key" fashion. This model stated that the enzyme and substrate fit together perfectly in one instantaneous step. However, current research supports a more refined view scientists call induced fit. The induced-fit model expands upon the lock-and-key model by describing a more dynamic interaction between enzyme and substrate. As the enzyme and substrate come together, their interaction causes...
11.7K
Introduction to Mechanisms of Enzyme Catalysis01:13

Introduction to Mechanisms of Enzyme Catalysis

10.3K
10.3K
Factors Influencing the Rate of Chemical Reactions01:22

Factors Influencing the Rate of Chemical Reactions

9.6K
A variety of factors influence the rate of chemical reactions. For a chemical reaction to happen, atoms must collide with enough energy to overcome the repulsion between their electrons. This energy is called activation energy. Factors influencing the rate of reaction either lower the activation energy or increase the likelihood of a successful collision.
Concentration and Pressure:
The more particles present within a given space, the more likely those particles are to bump into one another....
9.6K
Reduction of Alkenes: Asymmetric Catalytic Hydrogenation02:17

Reduction of Alkenes: Asymmetric Catalytic Hydrogenation

4.1K
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...
4.1K

You might also read

Related Articles

Articles linked to this work by shared authors, journal, and citation graph.

Sort by
Same author

Electrospun biodegradable polycaprolactone filter media for filtering facepiece respirators.

Journal of materials science. Polymers·2026
Same author

Cholesterol Nanofiber Patches with Sustainable Oil Delivery Eliminate Inflammation in Atopic Skin.

ACS applied materials & interfaces·2024
Same author

Statistics of Gaussian polymer chains in harmonic applied fields.

Journal of physics. Condensed matter : an Institute of Physics journal·2024
Same author

Molecular simulation of flow-enhanced nucleation of polyethylene crystallites in biaxial flows.

The Journal of chemical physics·2024
Same author

Mechanisms of Shock Dissipation in Semicrystalline Polyethylene.

Polymers·2023
Same author

Examination of Nanoparticle Filtration by Filtering Facepiece Respirators During the COVID-19 Pandemic.

ACS applied nano materials·2023

Related Experiment Video

Updated: Apr 18, 2026

Development of Heterogeneous Enantioselective Catalysts using Chiral Metal-Organic Frameworks MOFs
08:25

Development of Heterogeneous Enantioselective Catalysts using Chiral Metal-Organic Frameworks MOFs

Published on: January 17, 2020

7.9K

Electrochemically responsive heterogeneous catalysis for controlling reaction kinetics.

Xianwen Mao1, Wenda Tian, Jie Wu

  • 1Department of Chemical Engineering and ‡Department of Chemistry, Massachusetts Institute of Technology , 77 Massachusetts Avenue, Cambridge, Massachusetts 02139, United States.

Journal of the American Chemical Society
|January 8, 2015
PubMed
Summary

We developed electrochemically responsive heterogeneous catalysis (ERHC) to precisely control reaction rates. This method offers continuous adjustment of catalyst activity for flexible reaction management in flow reactors.

More Related Videos

Precise Electrochemical Sizing of Individual Electro-Inactive Particles
05:03

Precise Electrochemical Sizing of Individual Electro-Inactive Particles

Published on: August 4, 2023

1.8K
Multiscale Sampling of a Heterogeneous Water/Metal Catalyst Interface using Density Functional Theory and Force-Field Molecular Dynamics
10:52

Multiscale Sampling of a Heterogeneous Water/Metal Catalyst Interface using Density Functional Theory and Force-Field Molecular Dynamics

Published on: April 12, 2019

13.5K

Related Experiment Videos

Last Updated: Apr 18, 2026

Development of Heterogeneous Enantioselective Catalysts using Chiral Metal-Organic Frameworks MOFs
08:25

Development of Heterogeneous Enantioselective Catalysts using Chiral Metal-Organic Frameworks MOFs

Published on: January 17, 2020

7.9K
Precise Electrochemical Sizing of Individual Electro-Inactive Particles
05:03

Precise Electrochemical Sizing of Individual Electro-Inactive Particles

Published on: August 4, 2023

1.8K
Multiscale Sampling of a Heterogeneous Water/Metal Catalyst Interface using Density Functional Theory and Force-Field Molecular Dynamics
10:52

Multiscale Sampling of a Heterogeneous Water/Metal Catalyst Interface using Density Functional Theory and Force-Field Molecular Dynamics

Published on: April 12, 2019

13.5K

Area of Science:

  • Catalysis
  • Materials Science
  • Electrochemistry

Background:

  • Controlling reaction kinetics is crucial for chemical processes.
  • Existing responsive catalysis methods lack precise control and integration capabilities.
  • Electrochemical control offers a promising avenue for tunable catalysis.

Purpose of the Study:

  • To develop and demonstrate a novel electrochemically responsive heterogeneous catalysis (ERHC) system.
  • To enable continuous and precise control over reaction rates.
  • To showcase the system's applicability in batch and flow reactors.

Main Methods:

  • Fabrication of a hybrid ERHC system using carbon microfibers and redox polymer coatings.
  • Utilizing a Michael reaction to study kinetics dependent on redox state.
  • Applying electrochemical potentials to modulate catalyst activity.
  • Performing COMSOL simulations for flow reactor integration.

Main Results:

  • Demonstrated continuous variation of reaction rates with applied electrochemical potential.
  • Observed Nernstian-like dependence of reaction rate on potential.
  • Showcased manipulation of reactant concentration-time profiles in batch reactors.
  • Simulated flexible spatial and temporal control in flow reactors.

Conclusions:

  • ERHC provides a versatile platform for precise control of chemical reactions.
  • The system allows for continuous tuning of catalyst activity.
  • ERHC is readily integrable into flow reactors for advanced process control.