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Videos de Conceptos Relacionados

Hydrogen Bonds00:26

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...
Noble Gases02:54

Noble Gases


The elements in group 18 are noble gases (helium, neon, argon, krypton, xenon, and radon). They earned the name “noble” because they were assumed to be nonreactive since they have filled valence shells. In 1962, Dr. Neil Bartlett at the University of British Columbia proved this assumption to be false.
Batteries and Fuel Cells03:12

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...
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...
Aldehydes and Ketones with Water: Hydrate Formation01:20

Aldehydes and Ketones with Water: Hydrate Formation

An oxygen-based nucleophile, like water, can undergo addition reactions with aldehydes and ketones. The reaction leads to the formation of hydrates, also referred to as 1,1-diols or geminal diols.
The formation of hydrates is a reversible reaction. Hydrate formation is influenced by steric and electronic factors accompanying the alkyl substituents on the carbonyl group: The rate of hydrate formation increases with a decrease in the number of alkyl groups attached to the carbonyl carbon. Hence,...
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...

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Video Experimental Relacionado

Updated: Jul 10, 2026

Supercritical Nitrogen Processing for the Purification of Reactive Porous Materials
09:05

Supercritical Nitrogen Processing for the Purification of Reactive Porous Materials

Published on: May 15, 2015

Materiales de almacenamiento de hidrógeno: propiedades y posibilidades.

R L Cohen, J H Wernick

    Science (New York, N.Y.)
    |December 4, 1981
    PubMed
    Resumen

    El almacenamiento de hidrógeno en materiales intermetálicos ofrece un método seguro y económico para aplicaciones de combustible de hidrógeno. Las nuevas bombas y refrigeradores que utilizan el calor de este proceso están a punto de comercializarse.

    Área de la Ciencia:

    • Ciencia de los materiales Ciencia de los materiales.
    • Ingeniería Química Ingeniería Química.
    • Física Física es la física de las cosas.

    Sus antecedentes:

    • El almacenamiento de hidrógeno es crítico para las aplicaciones de combustible.
    • Los compuestos intermetálicos ofrecen propiedades únicas de absorción de hidrógeno.
    • Los métodos de almacenamiento actuales se enfrentan a desafíos en seguridad y eficiencia.

    Objetivo del estudio:

    • Para discutir la física y la química del almacenamiento de hidrógeno en depósitos intermetálicos.
    • Explorar la seguridad y la viabilidad económica del almacenamiento de hidruro intermetálico.
    • Revisar las aplicaciones emergentes basadas en el calor de sorción de hidrógeno.

    Principales métodos:

    • Revisión de los principios físicos y químicos que rigen las interacciones hidrógeno-intermetálicos.

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  • Análisis de los factores de seguridad y económicos para los sistemas de almacenamiento de hidruro.
  • Evaluación de los avances tecnológicos en bombas de calor y refrigeradores basados en sorción.

    • Principales resultados:

    • Los hidruros intermetálicos proporcionan un medio de almacenamiento seguro para el hidrógeno.
    • La viabilidad económica se logra cuando el hidrógeno se valora como combustible.
    • El calor de sorción es un principio viable para el desarrollo de nuevas bombas y refrigeradores.

    Conclusiones:

    • El almacenamiento de hidrógeno en depósitos intermetálicos es una tecnología prometedora.
    • Los hidruros intermetálicos ofrecen una solución segura y potencialmente económica para el combustible de hidrógeno.
    • Los sistemas de gestión térmica basados en sorción se están acercando a la viabilidad comercial.