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Tuning the Properties of MOF-808 via Defect Engineering and Metal Nanoparticle Encapsulation
Rifan Hardian1, Stefano Dissegna2, Aladin Ullrich3
1CNRS, MADIREL (UMR 7246), Aix-Marseille University, Campus St Jérôme, 13013, Marseille, France.
Chemistry (Weinheim an Der Bergstrasse, Germany)
|February 15, 2021
Summary
Defect engineering in MOF-808 (Zr) metal-organic frameworks, through missing linkers or platinum nanoparticle encapsulation, enhances stability towards water and tunes adsorption properties, despite a porosity loss.
Area of Science:
- Materials Science
- Chemistry
- Nanotechnology
Background:
- Metal-organic frameworks (MOFs) offer tunable properties for various applications.
- Defect engineering and metal encapsulation are key strategies to modify MOF characteristics.
- MOF-808 (Zr) is a promising MOF with potential for adsorption and catalytic applications.
Purpose of the Study:
- To investigate the impact of defect engineering and platinum nanoparticle encapsulation on MOF-808 (Zr) properties.
- To understand how these modifications influence the intrinsic and reactive characteristics of MOF-808.
- To quantify the reactivity changes using adsorption calorimetry.
Main Methods:
- Synthesis and characterization of various MOF-808 (Zr) samples.
- Introduction of defects (missing linkers) and encapsulation with platinum nanoparticles.
- Quantification of reactivity via water and carbon dioxide (CO2) adsorption calorimetry.
Main Results:
- Observed competitive effects between crystal morphology and missing linker defects.
- Defects and Pt encapsulation influenced MOF-808 crystal morphology, porosity, stability, and reactivity.
- Despite reduced porosity, defects improved MOF-808 stability against water.
Conclusions:
- Defect engineering and metal encapsulation are effective for tuning MOF-808 properties.
- These modifications enhance MOF-808 stability towards water.
- Strategic introduction of defects can be used to optimize adsorption properties of MOF-808.
