In situ cell for grazing-incidence x-ray diffraction on thin films in thermal catalysis

Area of Science:

• Materials Science
• Surface Science
• Catalysis

Background:

• In situ studies of thin film catalysts under reaction conditions are crucial for understanding catalytic mechanisms.
• Existing methods may have limitations in controlling gas atmospheres and simultaneously performing multiple X-ray techniques.

Purpose of the Study:

• To present a novel gas-phase cell for synchrotron-based grazing-incidence X-ray diffraction.
• To enable in situ investigation of thin film samples under catalytically relevant conditions.
• To allow simultaneous X-ray reflectometry and fluorescence studies.

Main Methods:

• Development and testing of a specialized gas-phase cell for X-ray diffraction experiments.
• Utilizing synchrotron radiation for high-resolution structural analysis.
• Studying thin film samples (e.g., 3 nm Pd) under controlled gas atmospheres (H2, acetylene).

Main Results:

• The developed cell effectively minimizes diffraction contributions from sample enclosures.
• Demonstrated applicability for monitoring structural changes in Pd thin films during hydrogenation and semihydrogenation.
• Successfully investigated thin films under industrially relevant catalytic conditions.

Conclusions:

• The novel gas-phase cell is a valuable tool for in situ characterization of thin film catalysts.
• It facilitates the study of dynamic structural changes under realistic catalytic environments.
• Enables a deeper understanding of catalytic processes at the nanoscale.