Versatile in situ powder X-ray diffraction cells for solid-gas investigations

Area of Science:

• Materials Science
• Chemistry
• Physics

Background:

• In situ studies are crucial for understanding material behavior under reaction conditions.
• High-pressure gas absorption studies require specialized equipment for accurate measurements.

Purpose of the Study:

• To introduce novel sample cells for in situ powder X-ray diffraction.
• To enable gas absorption studies at pressures up to 300 bar.
• To facilitate the investigation of solid-gas and solid-liquid-gas reactions.

Main Methods:

• Development of multipurpose sample cells for X-ray diffraction.
• Utilizing single-crystal sapphire or quartz capillaries for sample containment.
• Testing cell performance, including burst pressures, up to approximately 300 bar.
• Employing an alternative cell design for studies up to 100 bar.

Main Results:

• Successful design and testing of two types of high-pressure gas absorption cells.
• Sapphire cells demonstrated suitability for rapid pressure cycling with burst pressures around 300 bar.
• Glass capillary cells offer a simpler alternative for studies up to 100 bar.
• Case studies illustrated the diverse applications of the developed cells.

Conclusions:

• The developed sample cells significantly advance the capabilities for in situ gas absorption studies.
• These tools provide researchers with versatile options for investigating material-gas interactions under high pressure.
• The findings support a deeper understanding of solid-gas and solid-liquid-gas reaction mechanisms.