Nanoframes made of noble-metal have received great interests in recent years owing to their superior performance in plasmonic, catalysis, and biomedicine. In this study, for the first time, we successfully synthesized Ru nanoframes using a two-step method. In the first step, Ru atoms were directed to selectively grow on the corners and edges of Pd truncated octahedra as the seeds, resulting in the formation of Pd-Ru core-frame octahedra. The key to the site-selective growth was careful manipulation of the reaction kinetics. In the second step, Ru nanoframes were produced from the Pd-Ru core-frame octahedra by removing the Pd cores through chemical etching. Importantly, the Ru nanoframes exhibited an fcc structure, replicating the crystal structure of initial Pd seeds. The fcc Ru nanoframes showed enhanced catalytic activities toward the reduction of p-nitrophenol and the dehydrogenation of ammonia borane compared to Ru nanowires with an hcp structure and roughly the same thickness.

Engineering Ru nanoframes with fcc crystal structure and enhanced catalytic activities

254th National Meeting (2017)

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