电取代法制备凹形八足铜金双金属纳米晶

Zhenni Wang , Qiang Li , Zhenhuan Zhao, Xiaomie Tong
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引用次数: 1

摘要

我们利用AuPPh3Cl与Cu纳米立方之间的取代反应合成了具有凹结构的八足Cu - au双金属合金。利用Cu纳米立方作为牺牲模板,通过调整取代反应和生长,我们成功地在合金纳米晶体上生成了高活性位点。关键是给反应溶液提供合适浓度的AuPPh3Cl-TOP。在电替换反应中注入高浓度的Au前驱体,生长过程占主导地位,得到空心八足体Cu-Au合金。相反,当Au前驱体浓度较低时,取代反应只能发生在纳米晶体上,导致生成Cu-Au纳米笼。本研究为制备具有高活性位的空心双金属纳米晶体提供了一种有效的策略。
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Synthesis of octapod Cu–Au bimetallic nanocrystal with concave structure through galvanic replacement reaction

We synthesized octapod Cu–Au bimetallic alloy with a concave structure by employing a replacement reaction between AuPPh3Cl and Cu nanocubes. Using 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, growth dominates the process, 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 generated Cu–Au nanocages. This work provides an effective strategy for the preparation of hollow bimetallic nanocrystals with high-active sites.

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来源期刊
Journal of Electronic Science and Technology
Journal of Electronic Science and Technology Engineering-Electrical and Electronic Engineering
CiteScore
4.30
自引率
0.00%
发文量
1362
审稿时长
99 days
期刊介绍: JEST (International) covers the state-of-the-art achievements in electronic science and technology, including the most highlight areas: ¨ Communication Technology ¨ Computer Science and Information Technology ¨ Information and Network Security ¨ Bioelectronics and Biomedicine ¨ Neural Networks and Intelligent Systems ¨ Electronic Systems and Array Processing ¨ Optoelectronic and Photonic Technologies ¨ Electronic Materials and Devices ¨ Sensing and Measurement ¨ Signal Processing and Image Processing JEST (International) is dedicated to building an open, high-level academic journal supported by researchers, professionals, and academicians. The Journal has been fully indexed by Ei INSPEC and has published, with great honor, the contributions from more than 20 countries and regions in the world.
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