IRIDIUM(IV) CHLORIDE

Iridium(IV) chloride hydrate can be used:

• To fabricate an Ir-decorated graphene electrode for vanadium redox flow batteries.
• As a precursor to synthesize iridium oxide nanoparticles. These nanoparticles can act as a stable catalyst for the hydrogenation of a series of nitrogen heterocycles.
• To prepare Ir single atom catalyst (Ir1–Ni(OH)2) for oxygen evolution reaction.

reagent type: catalyst
core: iridium

If it contains nitrogen, then repeatedly concentrate a conc HCl solution until free from nitrogen, and dry free from HCl in a vacuum over CaO until crystals are formed. The olive-green solid (yellow at ~700o) is very hygroscopic. [Woo & Yost J Am Chem Soc 53 884 1931, Grube in Handbook of Preparative Inorganic Chemistry (Ed. Brauer) Academic Press Vol II p1592 1965.]