Гидрид церия (CeH3)

Description

Cerium hydride (CeH3) is cerium trihydride, a binary compound of cerium with hydrogen. CAS 13864-02-3, EC number 237-608-2.

Basic Attributes

• CAS No: 13864-02-3
• Chemical Formula: CeH3
• Molecular Weight: 143.13982
• Exact weight: 142.92892
• EU number: 237-608-2

Physico-chemical characteristics

• Appearance: Dark blue amorphous powder or brittle blue-gray crystalline powder
• Solubility in water: decomposes in H2O

Substance class and special properties

Cerium hydride belongs to the metal hydrides of rare earth elements, capable of reversibly absorbing and releasing hydrogen. The compound spontaneously ignites in moist air and decomposes on contact with water, which determines the requirements for its storage and transportation.

Scope of application

Hydride compounds, including cerium hydride, serve as portable sources of hydrogen. The main application is hydrogen storage for fuel cells and hydrogen transport, where the material's ability to reversibly absorb hydrogen gas is valued. Cerium hydride is also being studied as part of alloying additives: in combination with other metals, it can increase the strength and corrosion resistance of alloys, which is in demand in the aerospace and automotive industries, where lightweight, high-strength materials are important. A separate direction is use in catalytic processes.

• hydrogen storage for fuel cells and hydrogen transport
• alloying additive to increase the strength and corrosion resistance of alloys
• catalysis

Safety precautions when handling

The material ignites spontaneously in moist air and decomposes in water, releasing hydrogen - work only in a dry, inert atmosphere, avoid contact with moisture, and store away from sources of ignition. When working with powder, take into account the pyrophoricity of finely dispersed rare earth metal hydrides.

Storage and transportation conditions

Store in an airtight container in an inert atmosphere (argon or nitrogen), in a dry place, away from water, oxidizing agents and sources of open flame. Transport in compliance with regulations for substances that react with water to release flammable gases.

Place among rare earth metal hydrides

Lanthanide hydrides, including cerium hydride, are being studied as an alternative to traditional metal hydride hydrogen storage systems based on nickel, titanium and vanadium. A key advantage of rare earth hydrides is the reversibility of the hydrogen absorption-release reaction at relatively moderate temperatures, which simplifies the design of charging and discharging systems compared to systems requiring high pressure or cryogenic temperatures.

Alloying effect in alloys

When cerium and its hydrides are introduced into the composition of alloys based on aluminum, magnesium and nickel, grain refinement of the crystalline structure and binding of harmful impurities is observed, which increases the plasticity and corrosion resistance of the finished material - an effect similar to the action of mischmetal, but realized through a hydride, rather than a metal form of supplying cerium to the melt.