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

Reduction of Alkenes: Catalytic Hydrogenation02:13

Reduction of Alkenes: Catalytic Hydrogenation

12.7K
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...
12.7K
Reduction of Alkenes: Asymmetric Catalytic Hydrogenation02:17

Reduction of Alkenes: Asymmetric Catalytic Hydrogenation

3.5K
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...
3.5K
Catalysis02:50

Catalysis

27.9K
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.
27.9K
Reduction of Alkynes to cis-Alkenes: Catalytic Hydrogenation02:24

Reduction of Alkynes to cis-Alkenes: Catalytic Hydrogenation

8.2K
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.
8.2K
Reduction of Benzene to Cyclohexane: Catalytic Hydrogenation01:28

Reduction of Benzene to Cyclohexane: Catalytic Hydrogenation

5.1K
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...
5.1K

You might also read

Related Articles

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

Sort by
Same author

O-Zn-N-Bonded and Zn Vacancy-Rich ZnO/ZIF-8@CoPc Heterojunction for Photocatalytic N<sub>2</sub> Reduction.

Inorganic chemistry·2026
Same author

Advances in Electrocatalytic CO<sub>2</sub> Reduction Under Acidic Media: Interfacial Microenvironment, Catalyst Design, and Electrolyzers.

Small (Weinheim an der Bergstrasse, Germany)·2026
Same author

Rational design of high-loading electrocatalytic electrodes: from static multiscale integration to dynamic intelligent systems.

Chemical Society reviews·2026
Same author

Research progress of high-entropy catalysts in electrochemical oxidation of organic small molecules.

Chemical communications (Cambridge, England)·2026
Same author

d-Orbital modulation of high-entropy sulfides with amorphous/crystalline heterostructures for simultaneous hydrogen production and sulfur recovery.

Chemical science·2026
Same author

Electronic Structure Modulation in High-Entropy@Cu<sub><i>x</i></sub>S<sub><i>y</i></sub> Heterostructured Nanorods via Interface Engineering for Enhanced Multifunctional Electrocatalysis.

Inorganic chemistry·2026

Related Experiment Video

Updated: Oct 4, 2025

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

3.8K

Systematic Engineering on Ni-Based Nanocatalysts Effectively Promote Hydrogen Evolution Reaction.

Jiao Liu1, Zuochao Wang1, Dan Zhang1,2

  • 1Key Laboratory of Eco-Chemical Engineering, Key Laboratory of Optic-electric Sensing and Analytical Chemistry of Life Science, Taishan Scholar Advantage and Characteristic Discipline Team of Eco-Chemical Process and Technology, College of Chemistry and Molecular Engineering, Qingdao University of Science and Technology, Qingdao, 266042, P. R. China.

Small (Weinheim an Der Bergstrasse, Germany)
|February 7, 2022
PubMed
Summary

Researchers developed a fast, solvent-free method to create ultra-small nickel-based nanomaterials for efficient alkaline hydrogen evolution reactions (HER). The Ir-Ni/NiO@CNT catalyst shows superior performance and intrinsic activity for water splitting.

Keywords:
Ni-basedelectrocatalysisintrinsic activitylarge-scaleultra-small nanoparticals

More Related Videos

Synthesis of Platinum-nickel Nanowires and Optimization for Oxygen Reduction Performance
09:02

Synthesis of Platinum-nickel Nanowires and Optimization for Oxygen Reduction Performance

Published on: April 27, 2018

7.9K
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

19.8K

Related Experiment Videos

Last Updated: Oct 4, 2025

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

3.8K
Synthesis of Platinum-nickel Nanowires and Optimization for Oxygen Reduction Performance
09:02

Synthesis of Platinum-nickel Nanowires and Optimization for Oxygen Reduction Performance

Published on: April 27, 2018

7.9K
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

19.8K

Area of Science:

  • Materials Science
  • Electrochemistry
  • Nanotechnology

Background:

  • Developing efficient and stable electrocatalysts for the hydrogen evolution reaction (HER) in alkaline media is crucial for clean energy technologies.
  • Ultra-small nickel-based nanomaterials offer potential for high catalytic activity but face challenges in synthesis and stability.

Purpose of the Study:

  • To design and synthesize novel, ultra-small Ni-based nanomaterials for enhanced alkaline HER performance.
  • To investigate the catalytic mechanism and understand the role of noble metal doping and support materials.

Main Methods:

  • Solvent-free microwave reduction for rapid synthesis of M-Ni/NiO nanoparticles on carbon nanotubes (CNTs).
  • Electrochemical characterization including overpotential, turnover frequency (TOF), and exchange current density measurements.
  • Density Functional Theory (DFT) calculations to elucidate reaction mechanisms.

Main Results:

  • A series of 4 nm noble metal-doped Ni-NiO nanoparticles on CNTs were synthesized with high yield (>82.7%) in 60 seconds.
  • The Ir-Ni/NiO@CNT catalyst exhibited excellent HER performance with a low overpotential of 24.6 mV at 10 mA cm⁻².
  • High TOF (2.51 s⁻¹) and exchange current density (4.34 mA cm⁻²) indicated superior intrinsic catalytic activity.

Conclusions:

  • The developed solvent-free microwave method enables scalable and efficient synthesis of high-performance HER electrocatalysts.
  • Synergistic effects between NiO (OH* adsorption) and Ni (H* adsorption) on the catalyst surface promote the HER process.
  • This work provides valuable insights for designing advanced Ni-based electrocatalysts for large-scale hydrogen production.