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使用在Al吸收边缘的异常散射来确定和量化在热催化剂中的分布

Ana B Pinar¹, Przemyslaw Rzepka^1,2, Amy J Knorpp²

¹Laboratory for Catalysis and Sustainable Chemistry, Paul Scherrer Institut (PSI), 5232 Villigen, Switzerland.

Journal of the American Chemical Society

|October 25, 2021

概括

确定

科学领域:

材料科学
催化剂
晶体学

背景情况:

在石框架中的位置对于催化活性至关重要.
由于和具有相似的X射线散射因子,因此结晶学确定具有挑战性.
石催化剂通常含有较低的.

研究的目的:

开发一种方法来明确地确定在岩结构中的分布.
为了将的位置与FER类型化物中的催化性能相关联.

主要方法:

在AlK边缘附近使用了共振X射线粉碎衍射.
结合了传统的同步光粉衍射与边缘特定数据.
应用X射线吸收边缘技术来突出.

主要成果:

成功确定了两种FER类型的的不同分布.
量化分析的位置,并将其与不同的催化活动相关联.
通过对先前的研究进行验证,提供定量见解.

结论:

响应式X射线粉碎衍射提供了一个强大的工具来定位在石中.
这种方法提供了对石催化剂的结构-活性关系的基本理解.
能够精确地描述热催化剂以提高性能.

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