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

MOSFET: Enhancement Mode01:22

MOSFET: Enhancement Mode

727
Enhancement-mode MOSFETs are pivotal components in electronics, distinguished by their capacity to act as highly efficient switches. They are part of the larger family of metal-oxide Semiconductor Field-Effect Transistors (MOSFETs). They are available in two types: p-channel and n-channel, each tailored to specific polarity operations.
In their basic form, enhancement-mode MOSFETs are typically non-conductive when the gate-source voltage (Vgs) is zero. This default 'off' state means no...
727
Resonance and Hybrid Structures02:16

Resonance and Hybrid Structures

24.5K
According to the theory of resonance, if two or more Lewis structures with the same arrangement of atoms can be written for a molecule, ion, or radical, the actual distribution of electrons is an average of that shown by the various Lewis structures.
Resonance Structures and Resonance Hybrids
The Lewis structure of a nitrite anion (NO2−) may actually be drawn in two different ways, distinguished by the locations of the N–O and N=O bonds.
24.5K

You might also read

Related Articles

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

Sort by
Same author

Charge transfer-driven modulation of hydrogen evolution activity in NiCo LDHs <i>via</i> main group and 4d metal doping.

Physical chemistry chemical physics : PCCP·2026
Same author

Origin of adsorption trends in two-dimensional single-atom catalysts <i>via</i> d-state filling.

Physical chemistry chemical physics : PCCP·2026
Same author

Asymmetric Fe-Te Pairs Enhance Peroxymonosulfate Activation via Surface-Bound Hydroxyl Radicals Pathways.

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

Boosting sodium storage in needle coke-derived hard carbon anode <i>via</i> mild ammonium persulfate activation.

Nanoscale horizons·2026
Same author

In Situ Microenvironment Engineering Enables Synergistic Suppression of Protons and Chloride for Durable Seawater Oxidation.

ACS nano·2026
Same author

Unraveling Interband Hot-Electron Transfer in Hydrogenated Au@Cu<sub>2</sub>O/TiO<sub>2</sub> Heterostructure Nanocrystals for Enhanced Hydrogen Evolution.

Small (Weinheim an der Bergstrasse, Germany)·2026

Related Experiment Video

Updated: Jan 4, 2026

Residue-Free Fabrication of van der Waals Heterostructures of Two-Dimensional Materials
04:57

Residue-Free Fabrication of van der Waals Heterostructures of Two-Dimensional Materials

Published on: July 18, 2025

895

Structural and Electronic Optimization of MoS2 Edges for Hydrogen Evolution.

Hao Wang1,2, Xu Xiao3, Shuyuan Liu1

  • 1Soochow Institute for Energy and Materials Innovations & Key Laboratory of Advanced Carbon Materials and Wearable Energy Technologies of Jiangsu Province, College of Energy , Soochow University , Suzhou 215006 , China.

Journal of the American Chemical Society
|November 7, 2019
PubMed
Summary

This study developed nitrogen-doped molybdenum disulfide nanocrystals within a porous carbon network for enhanced hydrogen evolution reaction (HER) catalysis. The material shows superior activity and stability, marking a significant advancement in electrocatalyst design for energy applications.

More Related Videos

Preparation of Large-area Vertical 2D Crystal Hetero-structures Through the Sulfurization of Transition Metal Films for Device Fabrication
08:50

Preparation of Large-area Vertical 2D Crystal Hetero-structures Through the Sulfurization of Transition Metal Films for Device Fabrication

Published on: November 28, 2017

9.6K
Ohmic Contact Fabrication Using a Focused-ion Beam Technique and Electrical Characterization for Layer Semiconductor Nanostructures
08:12

Ohmic Contact Fabrication Using a Focused-ion Beam Technique and Electrical Characterization for Layer Semiconductor Nanostructures

Published on: December 5, 2015

12.7K

Related Experiment Videos

Last Updated: Jan 4, 2026

Residue-Free Fabrication of van der Waals Heterostructures of Two-Dimensional Materials
04:57

Residue-Free Fabrication of van der Waals Heterostructures of Two-Dimensional Materials

Published on: July 18, 2025

895
Preparation of Large-area Vertical 2D Crystal Hetero-structures Through the Sulfurization of Transition Metal Films for Device Fabrication
08:50

Preparation of Large-area Vertical 2D Crystal Hetero-structures Through the Sulfurization of Transition Metal Films for Device Fabrication

Published on: November 28, 2017

9.6K
Ohmic Contact Fabrication Using a Focused-ion Beam Technique and Electrical Characterization for Layer Semiconductor Nanostructures
08:12

Ohmic Contact Fabrication Using a Focused-ion Beam Technique and Electrical Characterization for Layer Semiconductor Nanostructures

Published on: December 5, 2015

12.7K

Area of Science:

  • Materials Science
  • Electrochemistry
  • Catalysis

Background:

  • Molybdenum disulfide (MoS2) edge sites are crucial for efficient hydrogen evolution reaction (HER).
  • Activating and increasing the accessibility of these MoS2 edge sites is key to improving HER performance.
  • Existing MoS2-based catalysts often face limitations in activity and accessibility.

Purpose of the Study:

  • To fabricate a novel electrocatalyst combining ultrasmall, nitrogen-doped MoS2 nanocrystals (N-MoS2) with a porous carbon network (CN).
  • To investigate the synergistic effects of nitrogen doping and porous carbon confinement on MoS2 edge site activity and accessibility for HER.
  • To evaluate the catalytic performance and stability of the developed N-MoS2/CN material for HER.

Main Methods:

  • A self-templating strategy was employed to synthesize N-MoS2 nanocrystals confined within a porous carbon network.
  • Experimental characterization techniques were used to analyze the material's structure and properties.
  • Density functional theory (DFT) calculations were performed to understand the electronic structure and catalytic mechanisms.

Main Results:

  • The fabricated N-MoS2/CN material exhibited enhanced MoS2 edge site activation due to nitrogen doping.
  • The porous carbon network provided high accessibility to the active N-MoS2 sites.
  • The N-MoS2/CN demonstrated superior HER activity with a low overpotential (114 mV at 10 mA cm-2) and excellent long-term stability (>10 h).

Conclusions:

  • The N-MoS2/CN electrocatalyst represents one of the best MoS2-based materials for HER to date.
  • Synergistic structural and electronic modulations of MoS2 edges by N-doping and porous carbon confinement are effective for boosting HER efficiency.
  • This work offers a new strategy for designing advanced electrocatalysts with enhanced accessible active sites for energy conversion applications.