Zhenni Wang , Qiang Li , Zhenhuan Zhao, Xiaomie Tong
{"title":"电取代法制备凹形八足铜金双金属纳米晶","authors":"Zhenni Wang , Qiang Li , Zhenhuan Zhao, Xiaomie Tong","doi":"10.1016/j.jnlest.2020.100046","DOIUrl":null,"url":null,"abstract":"<div><p>We synthesized octapod Cu–Au bimetallic alloy with a concave structure by employing a replacement reaction between AuPPh<sub>3</sub>Cl 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 AuPPh<sub>3</sub>Cl-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.</p></div>","PeriodicalId":53467,"journal":{"name":"Journal of Electronic Science and Technology","volume":null,"pages":null},"PeriodicalIF":0.0000,"publicationDate":"2020-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/j.jnlest.2020.100046","citationCount":"1","resultStr":"{\"title\":\"Synthesis of octapod Cu–Au bimetallic nanocrystal with concave structure through galvanic replacement reaction\",\"authors\":\"Zhenni Wang , Qiang Li , Zhenhuan Zhao, Xiaomie Tong\",\"doi\":\"10.1016/j.jnlest.2020.100046\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<div><p>We synthesized octapod Cu–Au bimetallic alloy with a concave structure by employing a replacement reaction between AuPPh<sub>3</sub>Cl 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 AuPPh<sub>3</sub>Cl-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.</p></div>\",\"PeriodicalId\":53467,\"journal\":{\"name\":\"Journal of Electronic Science and Technology\",\"volume\":null,\"pages\":null},\"PeriodicalIF\":0.0000,\"publicationDate\":\"2020-06-01\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"https://sci-hub-pdf.com/10.1016/j.jnlest.2020.100046\",\"citationCount\":\"1\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Journal of Electronic Science and Technology\",\"FirstCategoryId\":\"95\",\"ListUrlMain\":\"https://www.sciencedirect.com/science/article/pii/S1674862X20300525\",\"RegionNum\":0,\"RegionCategory\":null,\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q1\",\"JCRName\":\"Engineering\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Journal of Electronic Science and Technology","FirstCategoryId":"95","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S1674862X20300525","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"Engineering","Score":null,"Total":0}
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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