Rhenium Oxide

Rhenium Oxide powder is a black-brown, monoclinic crystal structure, density of about 11.4 ~ 11.6g/cm³, melting point of about 1000 ℃ but 700 ℃ begins to decompose, slightly soluble in water and soluble in concentrated halogenated acids, co-melting with alkali in the air can form perrhenate inorganic compounds powder.

Properties

Appearance: black-brown powder

Chemical formula: ReO2

Crystal structure: monoclinic crystal structure

Density: High density, about 11.4~11.6g/cm³.

Melting point: Melting point is relatively high, around 1000℃ (some data show that it is 1000℃ (1832℉)).

Boiling point: starts to decompose at 700℃ to form rhenium metal and rhenium(II) oxide.

Solubility: slightly soluble in water, insoluble in dilute acid, soluble in concentrated halogenated acids. Co-melting with alkali in air can form perrhenate salt

Stability: stable at room temperature, but will decompose and other chemical reactions under specific conditions such as high temperature.

Oxidation: has a certain degree of oxidation, easy to nitric acid, hydrogen peroxide and other oxidising agents to generate rhenic acid.

Reactivity: can be used as an intermediate product or catalyst to participate in some chemical reactions, but its reactivity is relatively complex, depending on the specific reaction conditions and substances with which it reacts.

Application

Chemical reaction catalyst: It can be used as a catalyst to participate in a variety of chemical reactions, for example, in some organic synthesis reactions, Rhenium Oxide powder can accelerate the reaction rate, improve the selectivity and yield of the reaction. In the petrochemical industry, ReO₂ powder catalyzes certain specific chemical reactions, helping to improve production efficiency and product quality.

Fuel cell catalysts: Some studies have explored their application in fuel cells as electrode catalysts to promote the oxidation of fuel and the reduction of oxygen to improve the performance and efficiency of fuel cells. However, applications in this area are still in the research and development stage.

Additives for high-temperature materials: Because rhenium has a high melting point, good heat resistance and creep resistance, Rhenium Oxide powder can be used as an additive to high-temperature alloys, ceramics and other materials to improve the high-temperature properties of the material, such as to improve the material’s high-temperature strength, thermal shock resistance. In aerospace, electronics and other high-temperature performance requirements of materials in the field of potential applications.

Electronic materials: Although rhenium oxide itself is not a good conductor of electricity, but in some special electronic structure materials, Rhenium Oxide powder can be used as a constituent, through the composite or doping with other materials, to regulate the electronic structure and performance of the material, for the preparation of new electronic devices or functional materials.

Optical field: In some optical coatings and materials, Rhenium Oxide powder can be used as an additive component to improve the optical properties of the materials, such as increasing the refractive index of the materials, improving the abrasion and corrosion resistance of the optical coatings. This may have certain application prospects in the manufacture of optical instruments, optical lenses and other products.

In the field of analytical chemistry: as a chemical reagent, it can be used in certain analytical test methods in analytical chemistry to help detect and analyse the composition and properties of other substances. For example, in spectral analysis, Rhenium Oxide powder can be used as a standard substance or auxiliary reagent to improve the accuracy and reliability of the analysis.