文章基本信息

标题：Spectroscopically clean Au nanoparticles for catalytic decomposition of hydrogen peroxide
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作者：Kai Liu ; Shuyue He ; Lin Li 等
期刊名称：Scientific Reports
电子版ISSN：2045-2322
出版年度：2021
卷号：11
DOI：10.1038/s41598-021-89235-y
语种：English
出版社：Springer Nature
摘要：Au nanoparticles synthesized from colloidal techniques have the capability in many applications such as catalysis and sensing. Au nanoparticles function as both catalyst and highly sensitive SERS probe can be employed for sustainable and green catalytic process. However, capping ligands that are necessary to stabilize nanoparticles during synthesis are negative for catalytic activity. In this work, a simple effective mild thermal treatment to remove capping ligands meanwhile preserving the high SERS sensitivity of Au nanoparticles is reported. We show that under the optimal treatment conditions (250 °C for 2 h), 50 nm Au nanoparticles surfaces are free from any capping molecules. The catalytic activity of treated Au nanoparticles is studied through H 2O 2 decomposition, which proves that the treatment is favorable for catalytic performance improvement. A reaction intermediate during H 2O 2 decomposition is observed and identified.