Efficient oxygen evolution on mesoporous IrO:X nanosheets

Bo Jiang, Jeonghun Kim, Yanna Guo, Kevin C.W. Wu, Saad M. Alshehri, Tansir Ahamad, Norah Alhokbany, Joel Henzie, Yusuke Yamachi

Research output: Contribution to journalArticlepeer-review

49 Citations (Scopus)


Amorphous iridium oxide (IrOx) is a 5d rare metal-based catalyst that has high activity towards the oxygen evolution reaction (OER) over a broad range of pH values. The scarcity of the elemental Ir makes large-scale applications more challenging, so increasing the material utilization efficiency is critical. We developed a sophisticated soft-templating method to synthesize mesoporous nanosheets via solution-based assembly of close-packed polymeric micelles in the presence of metal precursors and reducing agents. Heating the mesoporous nanosheets caused them to form amorphous IrOx perforated with a semi-regular arrangement of ∼13 nm diameter holes. Mesoporous nanosheets have a unique mixture of 2D and 3D topologies that enable superior electrocatalytic activities for the OER, and good stabilities under both acidic and basic conditions.

Original languageEnglish
Pages (from-to)3697-3702
Number of pages6
JournalCatalysis Science and Technology
Issue number14
Publication statusPublished - 2019

Bibliographical note

Publisher Copyright:
© 2019 The Royal Society of Chemistry.

All Science Journal Classification (ASJC) codes

  • Catalysis


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