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

Catalysis02:50

Catalysis

26.9K
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.
26.9K
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
Reduction of Alkenes: Asymmetric Catalytic Hydrogenation02:17

Reduction 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...
3.3K
Thermal and Photochemical Electrocyclic Reactions: Overview01:26

Thermal and Photochemical Electrocyclic Reactions: Overview

2.3K
Electrocyclic reactions are reversible reactions. They involve an intramolecular cyclization or ring-opening of a conjugated polyene. Shown below are two examples of electrocyclic reactions. In the first reaction, the formation of the cyclic product is favored. In contrast, in the second reaction, ring-opening is favored due to the high ring strain associated with cyclobutene formation.
2.3K
Electrolysis03:00

Electrolysis

26.3K
In a galvanic cell, the electrical work is done by a redox system on its surroundings as electrons produced by the spontaneous redox reactions are transferred through an external circuit. Alternatively, an external circuit does work on a redox system by imposing a voltage sufficient to drive an otherwise nonspontaneous reaction in a process known as electrolysis. For instance, recharging a battery involves the use of an external power source to drive the spontaneous (discharge) cell reaction in...
26.3K
Reduction of Benzene to Cyclohexane: Catalytic Hydrogenation01:28

Reduction of Benzene to Cyclohexane: Catalytic Hydrogenation

4.5K
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...
4.5K

You might also read

Related Articles

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

Sort by
Same author

Taffit: An Excel Tool for Fitting Tafel Data.

ACS measurement science au·2025
Same author

Thin Layer Sonoelectrochemistry: The Solvents.

The journal of physical chemistry. C, Nanomaterials and interfaces·2025
Same author

Electrochemical Detection of Single Aqueous Droplets in Organic Solvents via Pitting Collisions.

Analytical chemistry·2024
Same author

Why Sonochemistry in a Thin Layer? Constructive Interference.

The journal of physical chemistry. C, Nanomaterials and interfaces·2023
Same author

Redox Potentials of Magnetite Suspensions under Reducing Conditions.

Environmental science & technology·2022
Same author

Impacts of Surface Adsorption on Water Uptake within a Metal Organic Nanotube Material.

Langmuir : the ACS journal of surfaces and colloids·2022
Same journal

Scanning Tunneling Microscope-Based Break-Junction TechniqueA Tutorial.

ACS physical chemistry Au·2026
Same journal

Role of Small Membrane Proteins in the Green Sulfur Bacterial Reaction Center.

ACS physical chemistry Au·2026
Same journal

The Seasons of a Career in Physical Chemistry: Olivia Harper Wilkins.

ACS physical chemistry Au·2026
Same journal

Heavy Water Remodels the DNA Energy Landscape to Stabilize Folded States and Slow Transitions.

ACS physical chemistry Au·2026
Same journal

Free-Energy Profiles of Confined Reactions: Influence of Confinement Type and Challenges for Metadynamics Methods.

ACS physical chemistry Au·2026
Same journal

Chirality Transfer in Gold Nanoclusters: Insights from Chiral Spectroscopy and Theoretical Modeling.

ACS physical chemistry Au·2026
See all related articles

Related Experiment Video

Updated: Jun 29, 2025

Protein Film Infrared Electrochemistry Demonstrated for Study of H2 Oxidation by a [NiFe] Hydrogenase
10:01

Protein Film Infrared Electrochemistry Demonstrated for Study of H2 Oxidation by a [NiFe] Hydrogenase

Published on: December 4, 2017

12.2K

Magnetoelectrocatalysis: Evidence from the Hydrogen Evolution Reaction.

Krysti L Knoche Gupta1, Heung Chan Lee1, Johna Leddy1

  • 1Department of Chemistry, University of Iowa, Iowa City, Iowa 52240, United States.

ACS Physical Chemistry Au
|April 1, 2024
PubMed
Summary
This summary is machine-generated.

Magnetic fields significantly boost hydrogen evolution reaction (HER) rates on electrode surfaces. This magnetoelectrocatalysis effect is achieved by establishing interfacial magnetic gradients, enhancing electron transfer for cleaner energy production.

More Related Videos

Simple Methods for the Preparation of Non-noble Metal Bulk-electrodes for Electrocatalytic Applications
09:18

Simple Methods for the Preparation of Non-noble Metal Bulk-electrodes for Electrocatalytic Applications

Published on: June 21, 2017

11.4K
Synthesis of Metal Nanoparticles Supported on Carbon Nanotube with Doped Co and N Atoms and its Catalytic Applications in Hydrogen Production
08:40

Synthesis of Metal Nanoparticles Supported on Carbon Nanotube with Doped Co and N Atoms and its Catalytic Applications in Hydrogen Production

Published on: December 6, 2021

3.6K

Related Experiment Videos

Last Updated: Jun 29, 2025

Protein Film Infrared Electrochemistry Demonstrated for Study of H2 Oxidation by a [NiFe] Hydrogenase
10:01

Protein Film Infrared Electrochemistry Demonstrated for Study of H2 Oxidation by a [NiFe] Hydrogenase

Published on: December 4, 2017

12.2K
Simple Methods for the Preparation of Non-noble Metal Bulk-electrodes for Electrocatalytic Applications
09:18

Simple Methods for the Preparation of Non-noble Metal Bulk-electrodes for Electrocatalytic Applications

Published on: June 21, 2017

11.4K
Synthesis of Metal Nanoparticles Supported on Carbon Nanotube with Doped Co and N Atoms and its Catalytic Applications in Hydrogen Production
08:40

Synthesis of Metal Nanoparticles Supported on Carbon Nanotube with Doped Co and N Atoms and its Catalytic Applications in Hydrogen Production

Published on: December 6, 2021

3.6K

Area of Science:

  • Electrochemistry
  • Materials Science
  • Magnetism

Background:

  • Hydrogen evolution reaction (HER) is crucial for clean energy technologies.
  • Paramagnetic and ferromagnetic materials exhibit higher HER rates due to interfacial magnetic gradients.
  • Diamagnetic materials require induced magnetic gradients for enhanced HER.

Purpose of the Study:

  • To investigate the effect of magnetic gradients on hydrogen evolution reaction rates.
  • To demonstrate magnetoelectrocatalysis using magnetized microparticles.
  • To quantify the reduction in onset potential for HER.

Main Methods:

  • Comparison of HER rates on paramagnetic versus diamagnetic metals.
  • Induction of magnetic gradients at diamagnetic electrodes using magnetized microparticles (γ-Fe2O3, Fe3O4).
  • Measurement of onset potential shifts for hydrogen evolution.

Main Results:

  • Paramagnetic metals show 1000x higher HER rates than diamagnetic metals.
  • Magnetized γ-Fe2O3 and Fe3O4 microparticles lowered HER onset potential by 190 mV and 280 mV, respectively.
  • Magnetic gradients, not chemical composition, enhance electron transfer rates.

Conclusions:

  • Magnetic gradients at electrode surfaces significantly enhance hydrogen evolution reaction rates.
  • Magnetoelectrocatalysis is a viable strategy for improving electrocatalytic performance.
  • This work establishes magnetic gradients as a key factor in HER efficiency.