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MOCVD of rhodium, palladium and platinum complexes on fluidized divided substrates: Novel process for one‐step preparation of noble‐metal catalysts
Author(s) -
Hierso JeanCyrille,
Serp Philippe,
Feurer Roselyne,
Kalck Philippe
Publication year - 1998
Publication title -
applied organometallic chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.53
H-Index - 71
eISSN - 1099-0739
pISSN - 0268-2605
DOI - 10.1002/(sici)1099-0739(199803)12:3<161::aid-aoc689>3.0.co;2-6
Subject(s) - chemistry , rhodium , palladium , catalysis , cyclopentadienyl complex , alkene , platinum , metal , inorganic chemistry , electron microprobe , fluidized bed , organic chemistry , mineralogy
Abstract A new one‐step method, entitled fluidized‐bed metal‐organic chemical vapor deposition (FBMOCVD) of preparing highly dispersed metal‐supported catalysts is reported. The following complexes were studied and used as CVD precursors in presence of H 2 : [Rh(μ‐Cl)(CO) 2 ] 2 , Rh(allyl) 3 , Rh(acac)(CO) 2 , Pd(allyl)(hfac), Pd(allyl)(Cp), Pt(COD)(CH 3 ) 2 . (acac, acetylacetonato; hfac, hexafluoroacetylacetonato; Cp, cyclopentadienyl; COD, cyclooctadienyl). In a first approach, depositions on planar substrates were carried out to establish the best experimental conditions to obtain good‐quality deposits. X‐ray diffraction, X‐ray photo‐electron spectroscopy and electron microprobe studies were realized on the resulting thin films. Analyses of the products contained in the gas phase after and during deposition were performed by mass spectrometry and GC–MS. Finally, catalysts prepared by FBMOCVD were characterized by transmission electron microscopy–energy dispersion spectroscopy (TEM–EDS), metal‐loading determinations and specific‐surface measurements (BET). Dispersed nanosized aggregates were obtained, showing high activities in alkene hydrogenation and alcohol hydrocarbonylation. © 1998 John Wiley & Sons, Ltd.

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