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NanoSelect Pd Catalysts: What Causes the High Selectivity of These Supported Colloidal Catalysts in Alkyne Semi‐Hydrogenation?
Author(s) -
Witte Peter T.,
Boland Susan,
Kirby Fiona,
van Maanen Ramon,
Bleeker Bas F.,
de Winter D. A. Matthijs,
Post Jan A.,
Geus John W.,
Berben Peter H.
Publication year - 2013
Publication title -
chemcatchem
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.497
H-Index - 106
eISSN - 1867-3899
pISSN - 1867-3880
DOI - 10.1002/cctc.201200460
Subject(s) - selectivity , catalysis , scanning electron microscope , materials science , alkyne , yield (engineering) , palladium , chemical engineering , particle size , heterogeneous catalysis , chemistry , nanotechnology , inorganic chemistry , organic chemistry , metallurgy , composite material , engineering
In recent years, many articles describing the preparation of supported colloidal catalysts have been published. The semi‐hydrogenation of alkynes to yield cis ‐alkenes is often used as a test reaction in these publications. Many highly selective catalysts are described. However, a satisfactory explanation for the high reported selectivity has never been shown. Here we report a study on the possible effects that lead to the large selectivity differences between current commercial Pd/C catalysts and our newly developed NanoSelect catalysts. The focus is on differences in chemical composition as well as catalyst characteristics. We use a focused ion beam scanning electron microscope (FIB‐SEM) to locate the metal particle with respect to the surface of the support. FIB‐SEM analysis clearly shows the absence of the active component inside the support material, which could explain the high observed selectivity. Nevertheless, an effect of the stabilizer cannot be ruled out.