Solid-solution alloy nanoclusters of the immiscible gold-rhodium system achieved by a solid ligand-assisted approach for highly efficient catalysis  

作　　者：Xinchun Yang Zhangpeng Li Mitsunori Kitta Nobuko Tsumori Wenhan Guo Zitao Zhang Jianbo Zhang Ruqiang Zou Qiang Xu 

机构地区：[1]Institute of Electrochemical Energy,National Institute of Advanced Industrial Science and Technology(AIST),Ikeda,Osaka,563-8577,Japan [2]Graduate School of Engineering,Kobe University,Nada Ku,Kobe,Hyogo,657-8501,Japan [3]Department of Applied Chemistry and Chemical Engineering,Toyama National College of Technology,Toyama,939-8630,Japan [4]Department of Materials Science and Engineering,Peking University,Beijing,100871,China [5]Centre for High-Pressure Science and Technology Advanced Research,Beijing,100094,China [6]AIST-Kyoto University Chemical Energy Materials Open Innovation Laboratory,Yoshida,Sakyo-ku,Kyoto,606-8501,Japan

出　　处：《Nano Research》2020年第1期105-111,共7页纳米研究（英文版）

摘　　要：Striking effects are expected in solid-solution alloying,which offers enormous possibilities for various applications,especially in industrial catalysis.However,phase diagrams have revealed that a wide range of metallic elements are immiscible with each other even above their melting points.Achieving such unknown alloying between different immiscible metallic elements is highly desirable but challenging.Here,for the first time,by using an innovative solid ligand-assisted approach,we achieve the solid-solution alloying between the bulk-immiscible Au and Rh in plenty of clean,ultrafine(∼1.6 nm)and highly dispersed nanoclusters.The solid-solution alloying of immiscible Au and Rh significantly enhances their catalytic performance toward the hydrogen evolution from formic acid in contrast to the monometallic Au and Rh nanoclusters.Moreover,the resultant binary solid-solution nanoclusters are stable without any segregation during catalytic reactions.The approach demonstrated here for homogeneously mixing the immiscible metals at the atomic scale will benefit the creation of advanced alloys and their catalytic applications in future.

关 键 词：solid-solution alloys metal nanoclusters formic acid dehydrogenation heterogeneous catalysis 

分 类 号：TG14[一般工业技术—材料科学与工程]