Loading of MOF-5 and MOF-177 with Cu and ZnO nanoparticles by gas-phase infiltration with organometallic precursors: Properties of Cu/ZnO/MOF as catalysts for methanol synthesis

Maike Mueller, Stephan Hermes, Kevin Kaehler, Martin Muhler, R. A. Fischer

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

Abstract

We have been studying the loading of MOFs with functional metal and metal oxide nanoparticles without destroying the crystalline order of the host lattice aiming at novel metal/support materials for applications in heterogeneous catalysis. The MOFs are suggested to be viewed as solid solvent cages stabilizing the imbedded nanoparticles by comparably weak interfacial interactions. The materials [Zn4O(bdc)3] (MOF-5, bdc = 1,4-benzendicarbocylate) and [Zn4O(btb)2] (MOF-177, btb = benzene-1,3,5-tribenzoate) were loaded with [CpCuL] (L = PMe3, CNtBu) and, in the case of MOF-5, additionally with ZnEt2 leading to the isolable inclusion compounds precursor@MOF-5 and precursor@MOF-177. These intermediates were then converted into Cu/MOF, ZnO/MOF and Cu/ZnO/MOF by various methods which will be presented. The analytical and spectroscopic properties of the loaded MOFs are discussed based on PXRD, HRTEM, EXAFS, UV-VIS, FTIR and MAS NMR data. Catalytic activities for methanol formation from CO/CO2/H2 synthesis gas were found: 10% for Cu/MOF-5 and 60% for Cu/ZnO/MOF-5 as compared with the activity of an industrial reference catalyst Cu/ZnO/Al2O3 (100%). The specific activity based on the rather low Cu loading (1-10 wt.%) were however much higher as compared with the industrial system (Cu, 40-60 wt.%). This observation will be discussed in terms of the strong metal support interaction in heterogeneous catalysis.

Original languageEnglish
Title of host publicationAmerican Chemical Society - 235th National Meeting, Abstracts of Scientific Papers
StatePublished - 2008
Externally publishedYes
Event235th National Meeting of the American Chemical Society, ACS 2008 - New Orleans, LA, United States
Duration: 6 Apr 200810 Apr 2008

Publication series

NameACS National Meeting Book of Abstracts
ISSN (Print)0065-7727

Conference

Conference235th National Meeting of the American Chemical Society, ACS 2008
Country/TerritoryUnited States
CityNew Orleans, LA
Period6/04/0810/04/08

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