Date published: 2026-4-29

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Iridium(IV) Oxide (CAS 12030-49-8)

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Alternate Names:
Iridium dioxide; Iridium(IV)dioxide
CAS Number:
12030-49-8
Purity:
≥99%
Molecular Weight:
224.22
Molecular Formula:
IrO2
Supplemental Information:
This is classified as a Dangerous Good for transport and may be subject to additional shipping charges.
For Research Use Only. Not Intended for Diagnostic or Therapeutic Use.
* Refer to Certificate of Analysis for lot specific data.

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Iridium(IV) oxide, also known as iridium dioxide or IrO2, is a chemical compound composed of iridium and oxygen. It is one of the oxides of iridium, with iridium typically existing in its +4 oxidation state in this compound. Iridium(IV) oxide is a dark brown to black solid that is insoluble in water. It has a high melting point and is known for its stability and resistance to chemical attack. It is also a good conductor of electricity and exhibits semiconducting properties. Iridium(IV) oxide is widely used as a catalyst in electrochemical processes, such as water splitting and oxygen evolution reactions. Its high stability and conductivity make it a valuable material for electrochemical devices like fuel cells and electrolyzers.


Iridium(IV) Oxide (CAS 12030-49-8) References

  1. A nanostructured electrode of IrOx foil on the carbon nanotubes for supercapacitors.  |  Chen, YM., et al. 2011. Nanotechnology. 22: 355708. PMID: 21828896
  2. High-performance bifunctional porous non-noble metal phosphide catalyst for overall water splitting.  |  Yu, F., et al. 2018. Nat Commun. 9: 2551. PMID: 29959325
  3. Synthesis and Characterization of 3-DOM IrO₂ Electrocatalysts Templated by PMMA for Oxygen Evolution Reaction.  |  Liu, F., et al. 2019. Polymers (Basel). 11: PMID: 30960613
  4. Electrochemical deposition as a universal route for fabricating single-atom catalysts.  |  Zhang, Z., et al. 2020. Nat Commun. 11: 1215. PMID: 32139683
  5. Simultaneous Removal of Pollutants and Recovery of Nutrients from High-Strength Swine Wastewater Using a Novel Integrated Treatment Process.  |  Shim, S., et al. 2020. Animals (Basel). 10: PMID: 32408573
  6. Iridium-Doped Nanosized Zn-Al Layered Double Hydroxides as Efficient Water Oxidation Catalysts.  |  Fagiolari, L., et al. 2020. ACS Appl Mater Interfaces. 12: 32736-32745. PMID: 32583657
  7. Coordination engineering of iridium nanocluster bifunctional electrocatalyst for highly efficient and pH-universal overall water splitting.  |  Wang, Q., et al. 2020. Nat Commun. 11: 4246. PMID: 32843622
  8. Direct Detection of Surface Species Formed on Iridium Electrocatalysts during the Oxygen Evolution Reaction.  |  BalaKrishnan, A., et al. 2021. Angew Chem Int Ed Engl. 60: 21396-21403. PMID: 34343398
  9. Prevalence, environmental fate, treatment strategies, and future challenges for wastewater contaminated with SARS-CoV-2.  |  Kuzniewski, S. 2021. Remediation (N Y). 31: 97-110. PMID: 34539159
  10. MOF-Derived Ultrathin Cobalt Molybdenum Phosphide Nanosheets for Efficient Electrochemical Overall Water Splitting.  |  Wang, X., et al. 2022. Nanomaterials (Basel). 12: PMID: 35407217
  11. Regulating the electronic structures of mixed B-site pyrochlore to enhance the turnover frequency in water oxidation.  |  Zhang, C., et al. 2022. Nano Converg. 9: 22. PMID: 35583677
  12. Synthesis of Pyrochlore Oxides Containing Ir and Ru for Efficient Oxygen Evolution Reaction.  |  Matsumoto, A., et al. 2022. Materials (Basel). 15: PMID: 36079484
  13. The Ir-OOOO-Ir transition state and the mechanism of the oxygen evolution reaction on IrO2(110).  |  Binninger, T. and Doublet, ML. 2022. Energy Environ Sci. 15: 2519-2528. PMID: 36204599
  14. Rhenium Suppresses Iridium (IV) Oxide Crystallization and Enables Efficient, Stable Electrochemical Water Oxidation.  |  Huo, W., et al. 2023. Small. 19: e2207847. PMID: 36772894
  15. Carbonized Polydopamine-Based Nanocomposites: The Effect of Transition Metals on the Oxygen Electrocatalytic Activity.  |  Cebollada, J., et al. 2023. Nanomaterials (Basel). 13: PMID: 37177094

Ordering Information

Product NameCatalog #UNITPriceQtyFAVORITES

Iridium(IV) Oxide, 100 mg

sc-257619
100 mg
$658.00

Iridium(IV) Oxide, 1 g

sc-257619A
1 g
$2958.00