articleNature CommunicationsMar 4, 2023GOLD OA

Iridium oxide nanoribbons with metastable monoclinic phase for highly efficient electrocatalytic oxygen evolution

FLFan LiaoKYKui YinYJYujin JiWZWenxiang ZhuZFZhenglong Fan

Soochow University · Macau University of Science and Technology

PubMed
Indexed incrossrefdoajpubmed

Abstract

Abstract Metastable metal oxides with ribbon morphologies have promising applications for energy conversion catalysis, however they are largely restricted by their limited synthesis methods. In this study, a monoclinic phase iridium oxide nanoribbon with a space group of C2/m is successfully obtained, which is distinct from rutile iridium oxide with a stable tetragonal phase (P42/mnm). A molten-alkali mechanochemical method provides a unique strategy for achieving this layered nanoribbon structure via a conversion from a monoclinic phase K 0.25 IrO 2 (I2/m (12)) precursor. The formation mechanism of IrO 2 nanoribbon is clearly revealed, with its further conversion to IrO 2 nanosheet with a trigonal phase. When…

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Topics & keywords

Topics
Keywords
  • Monoclinic crystal system
  • Tetragonal crystal system
  • Electrocatalyst
  • Materials science
  • Oxide
  • Nanosheet
  • Phase (matter)
  • Metastability
UN Sustainable Development Goals
  • Affordable and clean energy
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