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Simultaneous Gas‐Phase Loading of MOF‐5 with Two Metal Precursors: towards Bimetallics@MOF
Author(s) -
Schröder Felicitas,
Henke Sebastian,
Zhang Xiaoning,
Fischer Roland A.
Publication year - 2009
Publication title -
european journal of inorganic chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.667
H-Index - 136
eISSN - 1099-0682
pISSN - 1434-1948
DOI - 10.1002/ejic.200900138
Subject(s) - chemistry , hydrogenolysis , bimetallic strip , powder diffraction , metal organic framework , adsorption , metal , bet theory , toluene , selected area diffraction , nanoparticle , transmission electron microscopy , nuclear chemistry , inorganic chemistry , crystallography , chemical engineering , catalysis , organic chemistry , engineering
Abstract Simultaneous gas‐phase loading of [Zn 4 O(bdc) 3 ] (bdc = 1,4‐benzenedicarboxylate; MOF‐5) with combinations of twodifferent MOCVD precursors such as [Fe(η 6 ‐toluene)(η 4 ‐C 4 H 6 )]/[CpPtMe 3 ], [CpPd(η 3 ‐C 3 H 5 )]/[CpPtMe 3 ] and [Ru(cod)(cot)]/[Pt(cod)Me 2 ] was followed by solid state 13 C MAS NMR spectroscopy, elemental analysis and X‐ray powder diffraction (PXRD). Different amounts of precursors were applied for the loading experiments. It was found that defined molar ratios of the adsorbed precursors inside MOF‐5 can be achieved when the loading is below the saturation level of MOF‐5 for adsorption of the individual precursors. The co‐hydrogenolysis of the loaded material [Ru(cod)(cot)]/[Pt(cod)Me 2 ]@MOF‐5 was selected as a representative example to study the possibility of obtaining bimetallic PtRu nanoparticles hosted inside the MOF support. The quantitative co‐hydrogenolysis of the adsorbed metal precursors led to formation of alloyed metal nanoparticles as revealed by PXRD, transmission electron microscopy (TEM) and selected area electron diffraction. However, the bdc linkers of the MOF‐5 host material were partially hydrogenated which caused a severe distortion of the MOF‐5 matrix, loss of long range crystalline order and reduction of the BET surface area down to 380 m 2 g –1 .(© Wiley‐VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2009)