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在热催化过程中在薄膜上进行草地发射X射线衍射的in situ细胞

Lukas Thum¹, Manuela Arztmann¹, Ivo Zizak¹

¹Helmholtz-Zentrum Berlin für Materialien und Energie, 14109 Berlin, Germany.

The Review of scientific instruments

|March 6, 2024

概括

这项研究引入了一种新的气相细胞用于现场X射线衍射,使得在反应条件下研究薄膜催化剂成为可能. 该细胞允许实时监测催化过程中的结构变化.

科学领域:

材料科学材料科学材料科学
表面科学是一门学科.
催化剂是一种催化剂.

背景情况:

在反应条件下的薄膜催化剂的现场研究对于理解催化机制至关重要.
现有的方法在控制气体大气层和同时执行多种X射线技术方面可能存在局限性.

研究的目的:

介绍一种新的气相细胞,用于基于同步子的牧场发射X射线衍射.
为了在具有催化作用的条件下使薄膜样本能够在现场进行研究.
为了允许同时进行X射线反射测量和光研究.

主要方法:

开发和测试用于X射线衍射实验的专门气相电池.
使用同步辐射进行高分辨率结构分析.
在受控气体大气层 (H2,乙) 下研究薄膜样本 (例如,3 nm Pd).

主要成果:

发达的细胞有效地减少了样本外的衍射贡献.
在化和半化过程中对Pd薄膜的结构变化进行监测.
在工业相关的催化条件下成功研究了薄膜.

结论:

这种新型气相细胞是薄膜催化剂在现场表征的宝贵工具.
它有助于在现实的催化环境下研究动态结构变化.
能够更深入地了解纳米级的催化过程.

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