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

3.4K
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...
3.4K
Reduction of Alkenes: Catalytic Hydrogenation02:13

Reduction of Alkenes: Catalytic Hydrogenation

12.5K
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...
12.5K
Catalysis02:50

Catalysis

27.5K
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.
27.5K
Reduction of Alkynes to cis-Alkenes: Catalytic Hydrogenation02:24

Reduction of Alkynes to cis-Alkenes: Catalytic Hydrogenation

8.1K
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.
8.1K
Oxidation of Alkenes: Syn Dihydroxylation with Osmium Tetraoxide02:44

Oxidation of Alkenes: Syn Dihydroxylation with Osmium Tetraoxide

10.8K
Alkenes are converted to 1,2-diols or glycols through a process called dihydroxylation. It involves the addition of two hydroxyl groups across the double bond with two different stereochemical approaches, namely anti and syn. Dihydroxylation using osmium tetroxide progresses with syn stereochemistry.
10.8K

You might also read

Related Articles

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

Sort by
Same author

Quantitative Active Hydrogen Modulation via Mastering Interfacial Water Over Single Rare Earth Atom on Copper for NO<sub>3</sub> <sup>-</sup>-to-NH<sub>3</sub> Electroreduction.

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

Fabrication and Rapid Gas-Sensing Response of NiO/ZnO p-n Heterojunctions for n-Propanol Gas.

Sensors (Basel, Switzerland)·2026
Same author

Coordination Engineering of Ir─Mo Atomic Pair Sites to Break Scaling Limitations for Acidic Oxygen Evolution.

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

Comparative Study of Confirmed versus Suspected Cases of <i>Vibrio vulnificus</i> Infection in Chaoshan District, Guangdong, China.

Infection and drug resistance·2026
Same author

Width-dependent electronic and magnetic properties of penta-PdSe<sub>2</sub> nanoribbons: a first-principles study.

Physical chemistry chemical physics : PCCP·2026
Same author

Flow-Cell-Compatible Operando Surface-Enhanced Raman Spectroscopy for Probing Reaction Intermediates during Carbon Dioxide Reduction Reaction.

The journal of physical chemistry letters·2026

Related Experiment Video

Updated: Sep 10, 2025

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

Dual-function Ln modification in multi-shell CoP: antioxidant stabilization and H* adsorption modulation for boosting

De-Kun Liu1, Yu-Lan Meng1, Zhen-Xu Gai1

  • 1School of Chemical Engineering, Ocean and Life Sciences, School of General Education, Leicester International Institute, State Key Laboratory of Fine Chemicals, Dalian University of Technology, 2 Dagong Road, Liaodongwan New District, Panjin, Liaoning 124221, China. lizhao_liu@dlut.edu.cn.

Chemical Communications (Cambridge, England)
|August 20, 2025
PubMed
Summary
This summary is machine-generated.

This study introduces a novel multi-shelled cerium-doped cobalt phosphide/oxide microsphere. This material enhances hydrogen evolution reaction (HER) activity by suppressing oxidation and optimizing electronic structure.

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

19.7K
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

3.7K

Related Experiment Videos

Last Updated: Sep 10, 2025

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
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

19.7K
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

3.7K

Area of Science:

  • Materials Science
  • Electrochemistry
  • Catalysis

Background:

  • Developing efficient electrocatalysts for the hydrogen evolution reaction (HER) is crucial for clean energy technologies.
  • Oxidation of active sites can limit the long-term stability and performance of catalysts.
  • Rare earth elements offer unique properties for material modification.

Purpose of the Study:

  • To construct and characterize a multi-shelled cerium-doped cobalt phosphide/oxide microsphere (CoP/CoO-5%Ce-ms).
  • To investigate the dual functions of cerium (Ce) doping in suppressing oxidation and optimizing electronic structure.
  • To evaluate the enhanced HER activity of the engineered catalyst.

Main Methods:

  • Morphological and rare earth engineering for material synthesis.
  • Experimental characterization of the catalyst structure and properties.
  • Theoretical investigations to understand the mechanism of cerium's influence.

Main Results:

  • Successful construction of multi-shelled CoP/CoO-5%Ce-ms.
  • Demonstration of cerium's dual role in preventing oxidation and tuning electronic properties.
  • Significant improvements in the active cobalt phosphide (CoP) phase, hydrogen adsorption energy (H*), and active site density.
  • Enhanced hydrogen evolution reaction (HER) activity.

Conclusions:

  • Cerium doping is an effective strategy for enhancing the stability and activity of CoP-based HER electrocatalysts.
  • The multi-shelled structure combined with Ce doping provides synergistic benefits for catalysis.
  • This work offers a promising pathway for designing advanced electrocatalysts for hydrogen production.