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Metal‐Organic Frameworks as Catalyst Supports: Influence of Lattice Disorder on Metal Nanoparticle Formation
Author(s) -
RiveraTorrente Miguel,
Filez Matthias,
Hardian Rifan,
Reynolds Emily,
Seoane Beatriz,
Coulet MarieVanessa,
Oropeza Palacio Freddy E.,
Hofmann Jan P.,
Fischer Roland A.,
Goodwin Andrew L.,
Llewellyn Philip L.,
Weckhuysen Bert M.
Publication year - 2018
Publication title -
chemistry – a european journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.687
H-Index - 242
eISSN - 1521-3765
pISSN - 0947-6539
DOI - 10.1002/chem.201800694
Subject(s) - nanoparticle , metal organic framework , materials science , chemical engineering , metal , catalysis , nanotechnology , colloid , chemistry , adsorption , organic chemistry , metallurgy , engineering
Because of their high tunability and surface area, metal‐organic frameworks (MOFs) show great promise as supports for metal nanoparticles. Depending on the synthesis route, MOFs may contain defects. Here, we show that highly crystalline MIL‐100(Fe) and disordered Basolite® F300, with identical iron 1,3,5‐benzenetricarboxylate composition, exhibit very divergent properties when used as a support for Pd nanoparticle deposition. While MIL‐100(Fe) shows a regular MTN‐zeotype crystal structure with two types of cages, Basolite® F300 lacks long‐range order beyond 8 Å and has a single‐pore system. The medium‐range configurational linker‐node disorder in Basolite® F300 results in a reduced number of Lewis acid sites, yielding more hydrophobic surface properties compared to hydrophilic MIL‐100(Fe). The hydrophilic/hydrophobic nature of MIL‐100(Fe) and Basolite® F300 impacts the amount of Pd and particle size distribution of Pd nanoparticles deposited during colloidal synthesis and dry impregnation methods, respectively. It is suggested that polar (apolar) solvents/precursors attractively interact with hydrophilic (hydrophobic) MOF surfaces, allowing tools at hand to increase the level of control over, for example, the nanoparticle size distribution.