Formation of a Cu@RhRu core-shell concave nanooctahedron via Ru-assisted extraction of Rh from the Cu matrix and its excellent electrocatalytic activity toward the oxygen evolution reaction

Suhyun Park, Donghwan Yoon, Sulgi Bang, Jongchan Kim, Hionsuck Baik, Haesik Yang, Kwangyeol Lee

Research output: Contribution to journalArticlepeer-review

9 Citations (Scopus)

Abstract

A facile one step route has been developed for the synthesis of trimetallic Cu@RhRu core-shell concave nanooctahedra by co-decomposition of Ru, Rh and Cu precursors. A mechanistic study reveals that nanoparticles with a CuRh alloy core and a Ru shell are initially formed and a subsequent migration of Rh to the shell results in the Cu@RhRu core-shell concave nanooctahedron. The shell exhibits atomically mixed Ru and Rh phases with an fcc atomic structure, although the hcp atomic structure is commonly found for the bulk Ru. We also report an unusually high catalytic activity of the Cu@RhRu octahedral nanocrystals toward the oxygen evolution reaction in alkaline solution.

Original languageEnglish
Pages (from-to)15065-15069
Number of pages5
JournalNanoscale
Volume7
Issue number37
DOIs
Publication statusPublished - 2015 Oct 7

ASJC Scopus subject areas

  • Materials Science(all)

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