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

31.6K
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.
31.6K
Hydrogen Bonds00:26

Hydrogen Bonds

131.8K
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....
131.8K
Acids, Bases and Neutralization Reactions03:26

Acids, Bases and Neutralization Reactions

63.6K
An acid-base reaction is one in which a hydrogen ion, H+, is transferred from one chemical species to another. Such reactions are of central importance to numerous natural and technological processes, ranging from the chemical transformations within cells or lakes and oceans to the industrial-scale production of fertilizers, pharmaceuticals, and other substances essential to the society.
63.6K
Chemical Reactions01:19

Chemical Reactions

95.4K
A chemical reaction is a process by which the bonds in the atoms of substances are rearranged to generate new substances. Matter cannot be created or destroyed in a chemical reaction—the same type and number of atoms that make up the reactants are still present in the products. Merely, the rearrangement of chemical bonds produces new compounds.
Chemical Reactions Rearrange Atoms into New Substances
A chemical reaction takes starting materials—the reactants—and changes them...
95.4K
Reaction Quotient02:35

Reaction Quotient

52.8K
The status of a reversible reaction is conveniently assessed by evaluating its reaction quotient (Q). For a reversible reaction described by m A + n B ⇌ x C + y D, the reaction quotient is derived directly from the stoichiometry of the balanced equation as
52.8K

You might also read

Related Articles

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

Sort by
Same author

Modulation of the Spin State of Atomic Fe-N<sub>4</sub> Sites with Interlayer-Adjacent Ir-N<sub>4</sub> for Superior ORR Activity.

Nano-micro letters·2026
Same author

A General Sol-Gel Route to Fabricate Large-Area Highly-Ordered Metal Oxide Arrays Toward High-Performance Zinc-Air Batteries.

Small (Weinheim an der Bergstrasse, Germany)·2024
Same author

Three-dimensional Ordered Macroporous Flexible Electrode Design toward High-Performance Zinc-Ion Batteries.

ACS applied materials & interfaces·2024
Same author

Ultrafine Ru nanoclusters supported on N/S doped macroporous carbon spheres for efficient hydrogen evolution reaction.

Nanoscale advances·2022
Same author

Three-dimensional BiVO<sub>4</sub>-based semiconductor photocathode for high efficiency photo-assisted Zn-iodine redox flow batteries.

Nanotechnology·2022
Same author

ALD oxygen vacancy-rich amorphous Ga<sub>2</sub>O<sub>3</sub> on three-dimensional urchin-like ZnO arrays for high-performance self-powered solar-blind photodetectors.

Nanoscale·2022

Related Experiment Video

Updated: Jan 23, 2026

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

Three-dimensional macroporous W2C inverse opal arrays for the efficient hydrogen evolution reaction.

Haifeng Zhang1, Qin Pan, Zhipeng Sun

  • 1Materials and Energy School, Guangdong University of Technology, No. 100 Waihuan Xi Road, Guang Zhou Higher Education Mega Center, Guangzhou 510006, Panyu District, P.R China. zpsunxj@163.com.

Nanoscale
|June 8, 2019
PubMed
Summary

Researchers developed a low-cost, durable tungsten carbide electrocatalyst for efficient hydrogen production via the hydrogen evolution reaction (HER). This novel material demonstrates superior performance and stability for overall water splitting applications.

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

20.3K
Optimization of Radiochemical Reactions using Droplet Arrays
10:54

Optimization of Radiochemical Reactions using Droplet Arrays

Published on: February 12, 2021

3.9K

Related Experiment Videos

Last Updated: Jan 23, 2026

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
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

20.3K
Optimization of Radiochemical Reactions using Droplet Arrays
10:54

Optimization of Radiochemical Reactions using Droplet Arrays

Published on: February 12, 2021

3.9K

Area of Science:

  • Materials Science
  • Electrochemistry
  • Catalysis

Background:

  • Efficient electrocatalysts are crucial for overall water splitting.
  • Non-precious metal catalysts offer a low-cost alternative to precious metals.
  • The hydrogen evolution reaction (HER) is a key process in water splitting.

Purpose of the Study:

  • To design and fabricate a novel, binder-free electrocatalyst for the hydrogen evolution reaction (HER).
  • To investigate the electrocatalytic performance and stability of the developed material.
  • To understand the structure-property relationships governing the catalyst's efficiency.

Main Methods:

  • Fabrication of three-dimensional macroporous ditungsten carbide (W2C) inverse opal (IO) arrays using WO3 IO as a template via thermal carburization.
  • Electrocatalytic performance testing in 0.5 M H2SO4 solution.
  • Theoretical calculations to analyze electronic structure and hydrogen adsorption.
  • Long-term stability assessment.

Main Results:

  • The W2C IO electrocatalyst exhibited a low overpotential of 146 mV at 10 mA cm-2.
  • A low Tafel slope of 78 mV dec-1 was achieved, indicating efficient HER kinetics.
  • The catalyst demonstrated excellent long-term stability.
  • Theoretical calculations confirmed favorable electronic structure and hydrogen adsorption Gibbs free energy.

Conclusions:

  • The developed W2C IO electrocatalyst shows significant promise for efficient and durable hydrogen evolution.
  • The 3D macroporous structure enhances charge/mass transfer, contributing to superior performance.
  • This non-precious metal catalyst is a viable candidate for low-cost, highly efficient overall water splitting.