Mesoporous Metallic Iridium Nanosheets

Bo Jiang, Yanna Guo, Jeonghun Kim, Andrew E. Whitten, Kathleen Wood, Kenya Kani, Alan E. Rowan, Joel Henzie, Yusuke Yamauchi

Research output: Contribution to journalArticlepeer-review

91 Citations (Scopus)

Abstract

Two-dimensional (2D) metals are an emerging class of nanostructures that have attracted enormous research interest due to their unusual electronic and thermal transport properties. Adding mesopores in the plane of ultrathin 2D metals is the next big step in manipulating these structures because increasing their surface area improves the utilization of the material and the availability of active sites. Here, we report a novel synthetic strategy to prepare an unprecedented type of 2D mesoporous metallic iridium (Ir) nanosheet. Mesoporous Ir nanosheets can be synthesized with close-packed assemblies of diblock copolymer (poly-(ethylene oxide)-b-polystyrene, PEO-b-PS) micelles aligned in the 2D plane of the nanosheets. This novel synthetic route opens a new dimension of control in the synthesis of 2D metals, enabling new kinds of mesoporous architectures with abundant catalytically active sites. Because of their unique structural features, the mesoporous metallic Ir nanosheets exhibit a high electrocatalytic activity toward the oxygen evolution reaction (OER) in acidic solution as compared to commercially available catalysts.

Original languageEnglish
Pages (from-to)12434-12441
Number of pages8
JournalJournal of the American Chemical Society
Volume140
Issue number39
DOIs
Publication statusPublished - 2018 Oct 3
Externally publishedYes

ASJC Scopus subject areas

  • Catalysis
  • Chemistry(all)
  • Biochemistry
  • Colloid and Surface Chemistry

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