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: 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
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
Catalysis02:50

Catalysis

28.0K
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.
28.0K
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
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
Regioselectivity and Stereochemistry of Hydroboration02:36

Regioselectivity and Stereochemistry of Hydroboration

8.5K
A significant aspect of hydroboration–oxidation is the regio- and stereochemical outcome of the reaction.
Hydroboration proceeds in a concerted fashion with the attack of borane on the π bond, giving a cyclic four-centered transition state. The –BH2 group is bonded to the less substituted carbon and –H to the more substituted carbon. The concerted nature requires the simultaneous addition of –H and –BH2 across the same face of the alkene giving syn...
8.5K

You might also read

Related Articles

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

Sort by
Same author

Two-coordinate Cu(I) sites in ZIF-derived porous carbon enable high CO working capacity for CO/N₂ separation.

Nature communications·2026
Same author

C5a/C5aR1 mediates AKI-CKD transition by enhancing autophagy.

Nephrology, dialysis, transplantation : official publication of the European Dialysis and Transplant Association - European Renal Association·2026
Same author

Multi-Atom Sub-Nanometer Assemblies on Interpenetrating Multi-Chambered N/C Nanospheres.

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

Deciphering the Catalytic Mechanism of Oxidoreductase-Like Nanozymes Along the Reaction Pathway: Activity, Specificity and Sustainability.

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

Atomic-Scale Full-Size Engineering of Platinum Nanozymes Enables High-Efficiency Catalytic Therapy.

ACS nano·2026
Same author

Constructing high-density active sites on hollow covalent organic polymers for efficient oxygen electrocatalysis.

Nature communications·2026

Related Experiment Video

Updated: Oct 7, 2025

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

Enhanced hydrogen generation by reverse spillover effects over bicomponent catalysts.

Zhe Gao1,2, Guofu Wang3,4, Tingyu Lei3

  • 1State Key Laboratory of Coal Conversion, Institute of Coal Chemistry, Chinese Academy of Sciences, Taiyuan, 030001, China. gaozhe@sxicc.ac.cn.

Nature Communications
|January 11, 2022
PubMed
Summary

Reverse spillover significantly enhances hydrogen generation from ammonia borane hydrolysis. This study confirms reverse spillover effects in novel bicomponent catalysts, aiding in designing efficient hydrogen production catalysts.

More Related Videos

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
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

8.5K

Related Experiment Videos

Last Updated: Oct 7, 2025

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
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
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

8.5K

Area of Science:

  • Catalysis
  • Materials Science
  • Chemical Engineering

Background:

  • The role of reverse spillover in hydrogen generation remains debated.
  • Developing efficient catalysts for hydrogen production is crucial.

Purpose of the Study:

  • To investigate and confirm the promotion functions of reverse spillover in ammonia borane hydrolysis.
  • To elucidate the catalytic mechanisms and guide the design of efficient hydrogen generation catalysts.

Main Methods:

  • Fabrication of a spatially separated NiO/Al2O3/Pt bicomponent catalyst using atomic layer deposition.
  • In situ quick X-ray absorption near-edge structure (XANES) characterization to observe reaction intermediates and processes.
  • Testing of CoOx/Al2O3/Pt and NiO/TiO2/Pt catalysts to confirm reverse spillover.

Main Results:

  • NiO and Pt nanoparticles were successfully localized on the outer and inner surfaces of Al2O3 nanotubes, respectively.
  • In situ XANES confirmed the reverse spillover of hydrogen species from NiO sites to Pt sites during ammonia borane hydrolysis.
  • The NiO/Al2O3/Pt catalyst demonstrated enhanced hydrogen generation rates attributed to reverse spillover.

Conclusions:

  • Reverse spillover effects were confirmed to enhance hydrogen generation rates in ammonia borane hydrolysis.
  • The findings provide a deeper understanding of catalytic mechanisms for hydrogen production.
  • This study offers guidance for designing advanced catalysts for efficient hydrogen generation.