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Related Concept Videos

Hydrogen Bonds00:26

Hydrogen Bonds

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.
Hydrogen Bonds01:04

Hydrogen Bonds

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...
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...

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Related Experiment Video

Updated: May 16, 2026

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

Progress on first-principles-based materials design for hydrogen storage.

Noejung Park1, Keunsu Choi, Jeongwoon Hwang

  • 1Interdisciplinary School of Green Energy, Low Dimensional Carbon Materials Center, Ulsan National Institute of Science and Technology, Ulsan 689-798, Korea.

Proceedings of the National Academy of Sciences of the United States of America
|November 20, 2012
PubMed
Summary

Researchers are designing advanced sorbent materials for efficient hydrogen storage. Key challenges include creating porous structures and enhancing hydrogen binding for practical applications.

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Related Experiment Videos

Last Updated: May 16, 2026

A Simple, Low-cost, and Robust System to Measure the Volume of Hydrogen Evolved by Chemical Reactions with Aqueous Solutions
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Hydrogen Production and Utilization in a Membrane Reactor

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Area of Science:

  • Materials Science
  • Chemical Engineering
  • Physical Chemistry

Background:

  • Hydrogen storage is crucial for clean energy technologies.
  • Sorbent materials offer an alternative to metal hydrides.
  • Current research focuses on optimizing material properties for hydrogen uptake.

Purpose of the Study:

  • To review research activities in hydrogen storage using sorbent materials.
  • To present recent findings and future directions in sorbent material design.
  • To compare sorption-based storage with other hydrogen storage methods.

Main Methods:

  • Utilizing reticular chemistry for stable, porous framework construction.
  • Investigating theoretical interactions (electrostatic, Kubas, orbital) to enhance hydrogen binding.
  • Employing hierarchical computational methods from ab initio studies to molecular dynamics.

Main Results:

  • Reticular chemistry aids in creating high-porosity structures.
  • Theoretical studies identify key interaction mechanisms for improved hydrogen affinity.
  • Computational methods enable accurate prediction of material performance.

Conclusions:

  • Sorbent materials show promise for hydrogen storage, addressing key challenges in framework stability and hydrogen binding.
  • Understanding and manipulating interaction mechanisms are vital for material design.
  • Hydrogen spillover mechanism can significantly boost storage capacity.