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

The Evidence for Evolution02:55

The Evidence for Evolution

47.7K
Genetic variations accumulating within populations over generations give rise to biological evolution. Evolutionary changes can result in the formation of novel varieties and entire new species. These changes are responsible for the diverse forms of life inhabiting the planet. The evidence for evolution suggests that all living organisms descended from common ancestors.
47.7K
Convergent Evolution01:54

Convergent Evolution

31.7K
Evolution shapes the features of organisms over time, ensuring that they are suited for the environments in which they live. Sometimes, selection pressure leads to the rise of similar but unrelated adaptations in organisms with no recent common ancestors, a process known as convergent evolution.
31.7K
Hydrogen Bonds00:26

Hydrogen Bonds

132.0K
Hydrogen bonds are weak attractions between atoms that have formed other chemical bonds. One of these atoms is electronegative, like oxygen, and has a partial negative charge. The other is a hydrogen atom that has bonded with another electronegative atom and has a partial positive charge.
Hydrogen Bonds Control the World!
Because hydrogen has very weak electronegativity when it binds with a strongly electronegative atom, such as oxygen or nitrogen, electrons in the bond are unequally shared....
132.0K
Hydrogen Bonds01:04

Hydrogen Bonds

13.6K
A hydrogen bond is formed when a weakly positive hydrogen atom already bonded to one electronegative atom (for example, the oxygen in the water molecule) is attracted to another electronegative atom from another polar molecule, such as water (H2O), hydrogen fluoride (HF), or ammonia (NH3). The huge electronegativity difference between the H atom (2.1) and the atom to which it is bonded (4.0 for an F atom, 3.5 for an O atom, or 3.0 for an N atom), combined with the very small size of an H atom...
13.6K
Eukaryotic Evolution01:24

Eukaryotic Evolution

40.4K
The endosymbiont theory is the most widely accepted theory of eukaryotic evolution; however, its progression is still somewhat debated. According to the nucleus-first hypothesis, the ancestral prokaryote first evolved a membrane to enclose DNA and form the nucleus. Conversely, the mitochondria-first hypothesis suggests that the nucleus was formed after endosymbiosis of mitochondria.
Contrary to the endosymbiont theory, the eukaryote-first hypothesis proposes that the simpler prokaryotic and...
40.4K
Synteny and Evolution02:31

Synteny and Evolution

3.8K
John H. Renwick first coined the term “synteny” in 1971, which refers to the genes present on the same chromosomes, even if they are not genetically linked. The species with common ancestry tend to show conserved syntenic regions. Therefore, the concept of synteny is nowadays used to describe the evolutionary relationship between species.
Around 80 million years ago, the human and mice lineages diverged from the common ancestor. During the course of evolution, the ancestral...
3.8K

You might also read

Related Articles

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

Sort by
Same author

Isolated unilateral pulmonary vein atresia with hemoptysis in a child: A case report and literature review.

Medicine·2018
Same author

Clinical factors associated with intestinal strangulating obstruction and recurrence in adhesive small bowel obstruction: A retrospective study of 288 cases.

Medicine·2018
Same author

[Determination of organic acids in 1, 2-butylene oxide products by valve switch-ion chromatography].

Se pu = Chinese journal of chromatography·2018
Same author

Disruption of Planar Cell Polarity Pathway Attributable to Valproic Acid-Induced Congenital Heart Disease through Hdac3 Participation in Mice.

Chinese medical journal·2018
Same author

Multispectral and large bandwidth achromatic imaging with a single diffractive photon sieve.

Optics express·2018
Same author

Immunization with Chlamydia psittaci plasmid-encoded protein CPSIT_p7 induces partial protective immunity against chlamydia lung infection in mice.

Immunologic research·2018

Related Experiment Video

Updated: Jan 26, 2026

Temperature-programmed Deoxygenation of Acetic Acid on Molybdenum Carbide Catalysts
08:15

Temperature-programmed Deoxygenation of Acetic Acid on Molybdenum Carbide Catalysts

Published on: February 7, 2017

11.8K

Progress in Electrocatalytic Hydrogen Evolution Based on Monolayer Molybdenum Disulfide.

Chuan Wang1, Jinzhao Huang1, Jiayue Chen1

  • 1School of Physics and Technology, University of Jinan, Jinan, China.

Frontiers in Chemistry
|April 4, 2019
PubMed
Summary

Two-dimensional molybdenum disulfide (MoS2) shows promise for electrocatalytic hydrogen evolution. Optimizing its structure and composition enhances active sites and conductivity for improved efficiency in sustainable energy systems.

Keywords:
active sitescomposite structureelectrocatalytic hydrogen evolutionintrinsic catalysismonolayer MoS2

More Related Videos

A Facile and Efficient Approach for the Production of Reversible Disulfide Cross-linked Micelles
09:57

A Facile and Efficient Approach for the Production of Reversible Disulfide Cross-linked Micelles

Published on: December 23, 2016

9.3K
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

8.1K

Related Experiment Videos

Last Updated: Jan 26, 2026

Temperature-programmed Deoxygenation of Acetic Acid on Molybdenum Carbide Catalysts
08:15

Temperature-programmed Deoxygenation of Acetic Acid on Molybdenum Carbide Catalysts

Published on: February 7, 2017

11.8K
A Facile and Efficient Approach for the Production of Reversible Disulfide Cross-linked Micelles
09:57

A Facile and Efficient Approach for the Production of Reversible Disulfide Cross-linked Micelles

Published on: December 23, 2016

9.3K
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

8.1K

Area of Science:

  • Materials Science
  • Electrochemistry
  • Nanotechnology

Background:

  • Electrocatalytic hydrogen evolution is crucial for sustainable energy.
  • Molybdenum disulfide (MoS2) is a promising 2D material for this application.
  • Current MoS2 catalysts face limitations in active sites, intrinsic activity, and conductivity.

Purpose of the Study:

  • To review the application of monolayer MoS2 and its composites in electrocatalytic hydrogen evolution.
  • To discuss strategies for enhancing MoS2 catalyst performance.
  • To provide insights into structural design for 2D electrocatalytic materials.

Main Methods:

  • Review of existing literature on monolayer MoS2 and its composites (0D, 1D, 2D nanomaterials).
  • Analysis of structural and compositional optimization strategies.
  • Discussion of structure-activity relationships and synergistic effects.

Main Results:

  • Optimizing composition and structure significantly enhances active sites, intrinsic catalytic activity, and interlayer conductivity of MoS2.
  • Composites with various nanomaterials improve the electrocatalytic performance of MoS2.
  • Strategies exist to enhance MoS2 electrocatalytic activity at macro, nano, and atomic levels.

Conclusions:

  • Structural and compositional optimization is key to improving MoS2-based electrocatalysts.
  • Further research should focus on structure-activity relationships and interface characteristics.
  • This review offers new directions for designing efficient 2D electrocatalytic materials for hydrogen evolution.