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Catalytic Dehydrogenation of Cyclohexene on Silica Overlayer Films
Author(s) -
Cogen Jeffrey M.,
EzazNikpay Khosro,
Fleming Ronald H.,
Baumann Scott M.,
Maier Wilhelm F.
Publication year - 1987
Publication title -
angewandte chemie international edition in english
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 5.831
H-Index - 550
eISSN - 1521-3773
pISSN - 0570-0833
DOI - 10.1002/anie.198711821
Subject(s) - overlayer , cyclohexene , catalysis , dehydrogenation , cyclohexane , benzene , hydrogen , metal , transition metal , materials science , inorganic chemistry , chemistry , photochemistry , organic chemistry , metallurgy
The preparation of nobel‐metal catalysts resistant to poisoning is a possibility opened up by the following experiment: On SiO 2 /Pt/Si layer catalysts (shown schematically below) in the presence of H 2 , cyclohexene undergoes reaction to give benzene and cyclohexane. The same is true when Pt/Si catalysts are used except that the activity is lower by a factor of 100. SiO 2 over‐layers of 0 to 30 nm lower the activity exponentially, after which the value remains constant up to 2200 nm. The results indicate that, instead of the transition‐metal surface, “active hydrogen” (atomic hydrogen) is the true catalytic species.