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Title: Solid-solution alloy nanoparticles of a combination of immiscible Au and Ru with a large gap of reduction potential and their enhanced oxygen evolution reaction performance
Authors: Zhang, Quan
Kusada, Kohei
Wu, Dongshuang
Ogiwara, Naoki
Yamamoto, Tomokazu
Toriyama, Takaaki
Matsumura, Syo
Kawaguchi, Shogo
Kubota, Yoshiki
Honma, Tetsuo
Kitagawa, Hiroshi
Author's alias: 張, 権
草田, 康平
吴, 冬霜
北川, 宏
Keywords: General Chemistry
Issue Date: 21-May-2019
Publisher: Royal Society of Chemistry (RSC)
Journal title: Chemical Science
Volume: 10
Issue: 19
Start page: 5133
End page: 5137
Abstract: Au and Ru are elements that are immiscible in the bulk state and have the largest gap in reduction potential among noble metals. Here, for the first time, AuxRu₁₋x solid-solution alloy nanoparticles (NPs) were successfully synthesized over the whole composition range through a chemical reduction method. Powder X-ray diffraction and scanning transmission electron microscopy coupled with energy-dispersive X-ray spectroscopy showed that Au and Ru atoms are homogeneously mixed at the atomic level. We investigated the catalytic performance of AuxRu₁₋x NPs for the oxygen evolution reaction, for which Ru is well known to be one of the best monometallic catalysts, and we found that even alloying with a small amount of Au could significantly enhance the catalytic performance.
Rights: This article is licensed under a Creative Commons Attribution 3.0 Unported Licence.
URI: http://hdl.handle.net/2433/241781
DOI(Published Version): 10.1039/C9SC00496C
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