金属间PdIn纳米粒子的形成:表面活性剂对纳米粒子原子结构的影响
Baiyu Wang1, Jette K Mathiesen2, Andrea Kirsch1
1Department of Chemistry, University of Copenhagen Universitetsparken 5 2100 Copenhagen Ø Denmark kirsten@chem.ku.dk.
Nanoscale advances
|December 7, 2023
概括
在合成过程中控制双金属-纳米粒子的原子结构是定制应用的关键. 像trioctylphosphine这样的表面活性剂显著影响最终的纳米粒子阶段和结构.
科学领域:
- 材料科学 材料科学 材料科学
- 纳米技术纳米技术
- 催化剂是一种催化剂.
背景情况:
- 双金属纳米粒子比单金属纳米粒子提供了增强的催化性能.
- 在合成过程中控制原子结构对于定制双金属材料特性至关重要.
研究的目的:
- 研究- (PdIn) 双金属纳米颗粒的形成.
- 了解合成参数和添加剂如何影响PdIn纳米粒子的原子结构.
主要方法:
- 使用oleylamine作为溶剂进行体合成.
- 研究了油酸 (OA) 和三聚氨酸 (TOP) 作为表面活性剂的作用.
- 使用*in situ*X射线总散射与对分布函数 (PDF) 分析.
主要成果:
- 在没有TOP的情况下,Pd3In最初形成,转化为结构为CsCl的PdIn纳米粒子.
- 使用TOP,合成产生了氧化 (In2O3) 和Pd3In.
- 合成参数的微妙变化显著改变了由此产生的原子结构.
结论:
- 合成条件和添加剂严格控制双金属PdIn纳米粒子的相位和结构.
- 定制纳米粒子合成对于实现所需的催化性能至关重要.
- 这项研究证明了纳米粒子形成对特定化学环境的敏感性.
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