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

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

Reduction of Alkenes: Asymmetric Catalytic Hydrogenation

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...
Catalysis02:50

Catalysis

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.
Catalysis01:27

Catalysis

Catalysis influences the rate of chemical reactions by providing an alternative reaction pathway with lower activation energy. A catalyst speeds up a reaction, but it is not consumed during the process. The fundamental principle of catalysis is the ability of a catalyst to alter the reaction mechanism, often introducing a more efficient pathway than the uncatalyzed process.In a catalyzed reaction, the catalyst participates directly in the reaction mechanism. It interacts with reactants to form...
Reduction of Alkenes: Catalytic Hydrogenation02:13

Reduction of Alkenes: Catalytic Hydrogenation

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 surface of...
Reduction of Alkynes to cis-Alkenes: Catalytic Hydrogenation02:24

Reduction of Alkynes to cis-Alkenes: Catalytic Hydrogenation

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.

You might also read

Related Articles

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

Sort by
Same author

Electrochemically Triggered Supramolecular Polymerization Under Kinetic Control.

Angewandte Chemie (International ed. in English)·2026
Same author

Programmable 3D Photovoltaics via Mechanically Origami-Coded Interlocked 3D Kirigami and Nano-Root Anchored AgNWs-In-Ga Multiphasic Alloy Conductor.

Advanced materials (Deerfield Beach, Fla.)·2026
Same author

Significant stability enhancement in photocatalytic CO<sub>2</sub> reduction via flow-driven strategies.

Nature communications·2026
Same author

Dual Targeting of HIF-1α and DLL4 by Isoxanthohumol Potentiates Immune Checkpoint Blockade.

International journal of molecular sciences·2026
Same author

Aldehyde-Functionalized Cellulose Nanofiber Hydrogels for pH-Sensitive Drug Delivery via Dynamic Imine Bonding.

ACS omega·2026
Same author

Oxide-hybridized carbon as a catalyst support for efficient anion exchange membrane water electrolysis.

Nature communications·2025

Related Experiment Video

Updated: May 15, 2026

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

Hydroxyapatite supported cobalt catalysts for hydrogen generation.

Justyn Wayne Jaworski1, Sunghwa Cho, Yeoungyong Kim

  • 1Department of Chemical Engineering, Hanyang University, Seoul 133-791, South Korea.

Journal of Colloid and Interface Science
|December 26, 2012
PubMed
Summary

Researchers developed an inexpensive hydroxyapatite (HAP) catalyst modified with cobalt for efficient hydrogen generation from sodium borohydride (NaBH(4)). Tailoring HAP

More Related Videos

A Simple, Low-cost, and Robust System to Measure the Volume of Hydrogen Evolved by Chemical Reactions with Aqueous Solutions
06:32

A Simple, Low-cost, and Robust System to Measure the Volume of Hydrogen Evolved by Chemical Reactions with Aqueous Solutions

Published on: August 17, 2016

Developing Photosensitizer-Cobaloxime Hybrids for Solar-Driven H2 Production in Aqueous Aerobic Conditions
10:21

Developing Photosensitizer-Cobaloxime Hybrids for Solar-Driven H2 Production in Aqueous Aerobic Conditions

Published on: October 5, 2019

Related Experiment Videos

Last Updated: May 15, 2026

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

A Simple, Low-cost, and Robust System to Measure the Volume of Hydrogen Evolved by Chemical Reactions with Aqueous Solutions
06:32

A Simple, Low-cost, and Robust System to Measure the Volume of Hydrogen Evolved by Chemical Reactions with Aqueous Solutions

Published on: August 17, 2016

Developing Photosensitizer-Cobaloxime Hybrids for Solar-Driven H2 Production in Aqueous Aerobic Conditions
10:21

Developing Photosensitizer-Cobaloxime Hybrids for Solar-Driven H2 Production in Aqueous Aerobic Conditions

Published on: October 5, 2019

Area of Science:

  • Materials Science
  • Catalysis
  • Renewable Energy

Background:

  • Efficient hydrogen generation is crucial for energy applications.
  • Current methods often rely on expensive catalytic materials.
  • Developing cost-effective and durable catalysts is essential.

Purpose of the Study:

  • To create a novel, inexpensive, and durable catalytic support for hydrogen generation.
  • To investigate the effect of hydroxyapatite (HAP) surface modification with cobalt ions.
  • To enhance hydrogen generation rates from sodium borohydride (NaBH(4)).

Main Methods:

  • Synthesized hydroxyapatite (HAP) crystals with varying calcium composition and morphology.
  • Modified HAP supports with cobalt ions to create catalytic sites.
  • Tested the catalytic activity of modified HAP for sodium borohydride hydrolysis.
  • Evaluated catalyst durability over repeated use.

Main Results:

  • Calcium-deficient HAP and single-crystal HAP showed enhanced cobalt surface coverage and faster hydrolysis rates.
  • Single-crystal HAP exhibited significantly higher hydrogen generation despite a smaller surface area.
  • Catalytic efficiency decreased by approximately 25% over 3 weeks of repeated use.

Conclusions:

  • Altering the composition and morphology of cobalt-ion-exchanged HAP supports effectively increases hydrogen generation rates.
  • This approach offers a viable strategy for developing cost-effective hydrogen generation technologies.
  • Further research into HAP-based catalysts can advance hydrogen storage solutions.