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 journalArticle

4 Citations (Scopus)

Abstract

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
Volume9
Issue number14
DOIs
Publication statusPublished - 2019
Externally publishedYes

ASJC Scopus subject areas

  • Catalysis

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    Jiang, B., Kim, J., Guo, Y., Wu, K. C. W., Alshehri, S. M., Ahamad, T., Alhokbany, N., Henzie, J., & Yamachi, Y. (2019). Efficient oxygen evolution on mesoporous IrO:X nanosheets. Catalysis Science and Technology, 9(14), 3697-3702. https://doi.org/10.1039/c9cy00302a