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Hydrogen Bonds

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...

Hydrogen Bonds

Hydrogen Bonds

Hydrogen BondsHydrogen 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...

Batteries and Fuel Cells

Batteries and Fuel Cells

A battery is a galvanic cell that is used as a source of electrical power for specific applications. Modern batteries exist in a multitude of forms to accommodate various applications, from tiny button batteries such as those that power wristwatches to the very large batteries used to supply backup energy to municipal power grids. Some batteries are designed for single-use applications and cannot be recharged (primary cells), while others are based on conveniently reversible cell reactions that...

Aldehydes and Ketones with HCN: Cyanohydrin Formation Overview

Aldehydes and Ketones with HCN: Cyanohydrin Formation Overview

Cyanohydrins are compounds that contain –CN and –OH groups on the same carbon atom. They are formed by the nucleophilic addition of the cyanide ions to the carbonyl group. Cyanide ions are highly basic and nucleophilic and can be generated from HCN under aqueous conditions. However, since HCN is a weak acid, the number of cyanide ions generated is very small. Hence, a small amount of base or KCN/NaCN is added to HCN to increase the concentration of the cyanide ions in the reaction mixture.

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Updated: Jun 3, 2026

Supercritical Nitrogen Processing for the Purification of Reactive Porous Materials

Supercritical Nitrogen Processing for the Purification of Reactive Porous Materials

Published on: May 15, 2015

Nanoconfined hydrides for energy storage.

Thomas K Nielsen¹, Flemming Besenbacher, Torben R Jensen

¹Interdisciplinary Nanoscience Center (iNANO), Center for Energy Materials, Aarhus University, DK-8000, Denmark.

|March 10, 2011

Summary

Nanoconfinement enhances chemical reactions and energy storage. This review explores nanoconfined hydrogen storage materials, offering inspiration for green chemistry and sustainable energy solutions.

Area of Science:

Materials Science
Green Chemistry
Chemical Engineering

Background:

The 21st century faces challenges in developing sustainable energy systems and green chemistry solutions.
Nanomaterials science offers new nanotools to improve chemical and catalytic processes.
Nanoconfinement is a key strategy to enhance reaction kinetics, stability, and thermodynamics.

Purpose of the Study:

To review the application of nanoconfinement in hydrogen storage materials.
To provide examples of nanoporous materials and their preparation methods for nanoconfinement.
To inspire research in other fields through nanoconfinement applications.

Main Methods:

Review of existing literature on nanoconfined hydrogen storage.
Analysis of selected nanoporous materials and their synthesis.

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Synthesis of Metal Nanoparticles Supported on Carbon Nanotube with Doped Co and N Atoms and its Catalytic Applications in Hydrogen Production

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Supercritical Nitrogen Processing for the Purification of Reactive Porous Materials

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A Simple, Low-cost, and Robust System to Measure the Volume of Hydrogen Evolved by Chemical Reactions with Aqueous Solutions

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Synthesis of Metal Nanoparticles Supported on Carbon Nanotube with Doped Co and N Atoms and its Catalytic Applications in Hydrogen Production

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

Evaluation of hydrogen storage properties in nanoconfined systems.

Main Results:

Nanoconfinement can significantly enhance the performance of hydrogen storage materials.
Various nanoporous materials and preparation techniques are suitable for creating nanoconfined systems.
Nanoconfined systems show promise for efficient chemical storage of renewable energy.

Conclusions:

Nanoconfinement is a promising approach for advancing sustainable energy technologies.
Further research into nanoconfined materials can lead to breakthroughs in green chemistry.
The principles of nanoconfinement are applicable across diverse scientific fields.