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Borohydride Hydrolysis Using a Mechanically and Chemically Stable Aluminium-Stainless Steel Porous Monolith Catalyst
Frances Pope1, Xhoi Xhaferri1, Daan Giesen2
1Van 't Hoff Institute for Molecular Sciences, University of Amsterdam, Science Park 904, 1098 XH, Amsterdam, The Netherlands.
This study introduces a novel, durable aluminum-stainless steel catalyst for efficient hydrogen release from borohydride salts. This PGM-free and CRM-free catalyst offers a sustainable solution for the energy transition.
Area of Science:
- Materials Science
- Catalysis
- Sustainable Energy
Background:
- The energy transition necessitates technologies reliant on critical metals, posing supply chain challenges.
- Developing alternative, sustainable materials for energy applications is crucial.
Purpose of the Study:
- To investigate novel catalysts for efficient hydrogen release from solid borohydride salts.
- To develop a PGM-free and CRM-free catalyst with high activity and durability.
Main Methods:
- Fabrication of structured catalyst/reactor monoliths using 3D printing and Raney-type leaching.
- Testing catalyst performance in borohydride hydrolysis using batch and continuous setups.
- Characterization of catalyst structure, stability, and composition.
Main Results:
- Aluminum-stainless steel (Al-SS) catalysts demonstrated high activity and exceptional stability in borohydride hydrolysis.
- Catalysts exhibited no mass loss or surface poisoning over 96 hours of continuous operation.
- Performance is linked to the stable porous structure, mechanical integrity, and accessible Al(OH)x sites.
Conclusions:
- The developed Al-SS catalyst offers superior mechanical and chemical durability compared to state-of-the-art alternatives.
- This PGM-free and CRM-free catalyst presents a scalable, low-waste, and sustainable option for hydrogen generation.
- The findings contribute significantly to advancing carbon-free energy technologies.
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