Editorial Feature

Iridium (Ir) Nanoparticles - Properties, Applications

Nanoparticles research is an area of extensive interest for research and for industry - market reports indicate that the demand for nanoparticles for commercial applications will continue to grow at an enormous rate for the forseeable future.

Iridium is a Block D, Period 6 element. It is a member of the platinum group of metals. It has a very high boiling point and is the most corrosion-resistant metal known. Iridium nanoparticles are graded as flammable along with the possibility of causing eye irritation.

Chemical Properties

The chemical properties of iridium nanoparticles are outlined in the following table.

Chemical Data
Chemical symbol Ir
CAS No. 7439-88-5
Group 9
Electronic configuration [Xe] 4f145d7 6s2

Physical Properties

The physical properties of iridium nanoparticles are given in the following table.

Properties Metric Imperial
Density 22.42 g/cm3 0.0008 lb/in3
Molar mass 192.22 g/mol -

Thermal Properties

The thermal properties of iridium nanoparticles are provided in the table below.

Properties Metric Imperial
Melting point 2410°C 4370°F
Boiling point 4527°C 8180.6 °F


Nanoparticles can be coated with a variety of metals such as gold, iridium, silver, and palladium. The resultant finishes have all the properties of solid metals. Also, they have a larger surface area which is extremely reflective. The final product is very lightweight and inexpensive.

Researchers are assessing the possibilities of applying iridium in various applications. The following are the current application areas:

  • In catalysts, chemical synthesis, electrocatalysts, biphasic catalysis and hydrogenation reactions
  • As a magnetic nanopowder
  • In polymer membranes to create active polymer membranes
  • In nanowires and other catalysis applications
  • In other coatings, plastics, nanofibers and textiles

Source: AZoNano

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