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

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...
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: 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...
Oxygenic Photosynthesis01:26

Oxygenic Photosynthesis

Oxygenic photosynthesis is a fundamental process in which light energy is harnessed to drive the oxidation of water, leading to the production of molecular oxygen (O₂), adenosine triphosphate (ATP), and nicotinamide adenine dinucleotide phosphate (NADPH). This process is essential for sustaining aerobic life on Earth and is primarily carried out by cyanobacteria, algae, and plants. The core of oxygenic photosynthesis lies in the thylakoid membranes, where chlorophyll pigments facilitate light...
Reduction of Benzene to Cyclohexane: Catalytic Hydrogenation01:28

Reduction of Benzene to Cyclohexane: Catalytic Hydrogenation

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...

You might also read

Related Articles

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

Sort by
Same author

Aurated Blue-Phosphorescent Platinum(II) Acetylide Complexes via Gold-Carbon σ Bond Formation.

Inorganic chemistry·2026
Same author

Inhibition of Aggregation-Caused Quenching in "Half-Sandwich" Red-PhosphorescentCyclometalated Platinum(II) Complexes.

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

Revisiting the origin of electrochemical activity in the topological semimetal PtGa.

Chemical science·2026
Same author

Combining Ag(II) and Ag(I) Reactivity Enables Electrophotochemical Acyl Fluoride Installation on (Hetero)Arenes.

Journal of the American Chemical Society·2026
Same author

Visible-light-induced chlorine photoelimination from acridinium-phosphine gold(iii) complexes.

Chemical science·2026
Same author

Correction to "Near-Unity Triplet Quantum Yield in a Molecular Cofacial H-Dimer".

Journal of the American Chemical Society·2026

Related Experiment Video

Updated: Jun 1, 2026

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

Photocatalytic hydrogen production.

Thomas S Teets1, Daniel G Nocera

  • 1Department of Chemistry, Massachusetts Institute of Technology, 6-335, 77 Massachusetts Avenue, Cambridge, MA 02139-4307, USA.

Chemical Communications (Cambridge, England)
|June 8, 2011
PubMed
Summary

Efficient solar energy storage in hydrogen fuel is key for renewable systems. This study reviews advances in photocatalytic hydrogen production using homogeneous catalysts, detailing two main approaches and future challenges.

Area of Science:

  • Photocatalysis
  • Renewable Energy Storage
  • Chemical Fuels

Background:

  • Large-scale solar energy utilization necessitates efficient chemical fuel storage.
  • Hydrogen (H2) production via photocatalysis is a promising avenue for renewable energy.
  • Homogeneous catalysts offer potential for efficient H2 generation.

Purpose of the Study:

  • To highlight recent advances in photocatalytic hydrogen production.
  • To review two primary approaches for homogeneous photocatalytic H2 generation.
  • To outline future directions and challenges in the field.

Main Methods:

  • Consideration of HX (X = Cl, Br) splitting with single-component catalysts.
  • Analysis of sensitized H2 production using sacrificial electron donors.

More Related Videos

Hydrogen Production and Utilization in a Membrane Reactor
10:00

Hydrogen Production and Utilization in a Membrane Reactor

Published on: March 10, 2023

Experimental Methods for Efficient Solar Hydrogen Production in Microgravity Environment
11:38

Experimental Methods for Efficient Solar Hydrogen Production in Microgravity Environment

Published on: December 3, 2019

Related Experiment Videos

Last Updated: Jun 1, 2026

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

Hydrogen Production and Utilization in a Membrane Reactor
10:00

Hydrogen Production and Utilization in a Membrane Reactor

Published on: March 10, 2023

Experimental Methods for Efficient Solar Hydrogen Production in Microgravity Environment
11:38

Experimental Methods for Efficient Solar Hydrogen Production in Microgravity Environment

Published on: December 3, 2019

  • Review of inner-sphere mechanisms in proton reduction and halide oxidation.

    • Main Results:

    • Detailed examination of two distinct photocatalytic H2 generation strategies.
    • Identification of catalyst regeneration mechanisms in sensitized H2 production.
    • Discussion of catalyst roles in both HX splitting and electron donation systems.

    Conclusions:

    • Photocatalytic hydrogen generation is advancing rapidly.
    • Two key strategies, HX splitting and sensitized production, show promise.
    • Further research is needed to address challenges in large-scale H2 production.