Department of Chemistry and Research Institute for Natural Sciences, Korea University, Seoul 136-701, Korea.
Nanoscale. 2015 Oct 7;7(37):15065-9. doi: 10.1039/c5nr03942h.
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.
一种简便的一步法被开发用于合成三金属 Cu@RhRu 核壳凹八面体，通过 Ru、Rh 和 Cu 前体的共分解。一项机理研究表明，最初形成具有 CuRh 合金核和 Ru 壳的纳米颗粒，随后 Rh 迁移到壳中导致 Cu@RhRu 核壳凹八面体形成。壳层表现出原子混合的 Ru 和 Rh 相，具有 fcc 原子结构，尽管体相 Ru 通常具有 hcp 原子结构。我们还报道了 Cu@RhRu 八面体纳米晶体在碱性溶液中对氧析出反应具有异常高的催化活性。
