Synthesis of Octapod Cu-Au Bimetallic Nanocrystal with Concave Structure through Galvanic Replacement Reaction

被引：0

作者：

Wang Z.-N. ^{[1
]}

Li Q. ^{[1
]}

Zhao Z.-H. ^{[1
]}

Tong X.-M. ^{[1
]}

机构：

[1] School of Advanced Materials and Nanotechnology, Xidian University, Xi'an,710126

来源：

Journal of Electronic Science and Technology | 2020年 / 18卷 / 02期

关键词：

Copper; gold; high-active site; replacement reaction;

D O I：

10.1016/j.jnlest.2020.100046

中图分类号：

学科分类号：

摘要：

We synthesized octapod Cu-Au bimetallic alloy with a concave structure by employing a replacement reaction between AuPPh3Cl and Cu nanocubes. Using the Cu nanocube as sacrificial templates, we have successfully generated high-active sites on alloy nanocrystals by carefully tuning the replacement reaction and growth. The key is to afford the proper concentration of AuPPh3Cl-TOP to the reaction solution. When the Au precursor with high concentration is injected into the galvanic replacement reaction, the growth dominated the process and hollowed octapod Cu-Au alloy was obtained. In contrast, when the concentration of the Au precursor is low, the replacement reaction can only take place at the nanocrystals, leading to generate Cu-Au nanocages. This work provides an effective strategy for the preparation of hollow bimetallic nanocrystals with high-active sites. © 2020

引用

页码：151 / 158

页数：7

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