Polyhedral Palladium-Silver Alloy Nanocrystals as Highly Active and Stable Electrocatalysts for the Formic Acid Oxidation Reaction.
Polyhedral Palladium-Silver Alloy Nanocrystals as Highly Active and Stable Electrocatalysts for the Formic Acid Oxidation Reaction.
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多面体钯银合金纳米晶作为甲酸氧化反应高活性和稳定的电催化剂
DOI：
10.1038/srep13703
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发表时间：
2015-09-02
影响因子：
4.6
通讯作者：
Tang YW
中科院分区：
文献类型：
--
作者：
Fu GT;Liu C;Zhang Q;Chen Y;Tang YW
多面体贵金属纳米晶作为光电器件和催化剂受到了广泛的关注和应用。本工作提出了一种简单有效的水热法制备高质量、尺寸均匀的Pd-Ag合金多面体的方法。通过各种物理技术对Pd-Ag合金多面体的形貌、成分和结构进行了全面表征，证明Pd-Ag合金多面体是高度合金化的。在实验观察和讨论的基础上，对Pd-Ag合金多面体的形成和生长机制进行了探讨。作为初步的电化学应用，Pd-Ag合金多面体应用于甲酸氧化反应，由于Pd和Ag原子之间的“协同效应”，其表现出比市售Pd黑更高的电催化活性和稳定性。
Polyhedral noble–metal nanocrystals have received much attention and wide applications as electrical and optical devices as well as catalysts. In this work, a straightforward and effective hydrothermal route for the controllable synthesis of the high-quality Pd–Ag alloy polyhedrons with uniform size is presented. The morphology, composition and structure of the Pd–Ag alloy polyhedrons are fully characterized by the various physical techniques, demonstrating the Pd–Ag alloy polyhedrons are highly alloying. The formation/growth mechanisms of the Pd–Ag alloy polyhedrons are explored and discussed based on the experimental observations and discussions. As a preliminary electrochemical application, the Pd–Ag alloy polyhedrons are applied in the formic acid oxidation reaction, which shows higher electrocatalytic activity and stability than commercially available Pd black due to the “synergistic effects” between Pd and Ag atoms.