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Issue 37, 2015
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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

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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.

Graphical abstract: 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

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Publication details

The article was received on 15 Jun 2015, accepted on 13 Aug 2015 and first published on 20 Aug 2015


Article type: Communication
DOI: 10.1039/C5NR03942H
Citation: Nanoscale, 2015,7, 15065-15069

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    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

    S. Park, D. Yoon, S. Bang, J. Kim, H. Baik, H. Yang and K. Lee, Nanoscale, 2015, 7, 15065
    DOI: 10.1039/C5NR03942H

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