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Surface‐Bonded Precursor Determines Particle Size Effects for Alkene Hydrogenation on Palladium
Author(s) -
Doyle Aidan M.,
Shaikhutdinov Shamil K.,
Freund HansJoachim
Publication year - 2005
Publication title -
angewandte chemie international edition
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 5.831
H-Index - 550
eISSN - 1521-3773
pISSN - 1433-7851
DOI - 10.1002/anie.200461614
Subject(s) - alkene , palladium , particle size , terrace (agriculture) , catalysis , adsorption , materials science , particle (ecology) , pentene , range (aeronautics) , photochemistry , chemistry , organic chemistry , composite material , geology , oceanography , archaeology , history
Size matters : The adsorption of trans ‐2‐pentene on Pd/Al 2 O 3 model catalysts exhibits site‐specific behavior, which results in a strong increase in hydrogenation activity within the 1–5‐nm particle size range, in contrast to ethene hydrogenation (see figure). The size effects are explained by the reactions proceeding via di‐σ‐bonded pentene, which is favored on the terrace sites of large particles, and π‐bonded ethene.