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High‐Resolution Single‐Turnover Mapping Reveals Intraparticle Diffusion Limitation in Ti‐MCM‐41‐Catalyzed Epoxidation
Author(s) -
De Cremer Gert,
Roeffaers Maarten B. J.,
Bartholomeeusen Evelyne,
Lin Kaifeng,
Dedecker Peter,
Pescarmona Paolo P.,
Jacobs Pierre A.,
De Vos Dirk E.,
Hofkens Johan,
Sels Bert F.
Publication year - 2010
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.200905039
Subject(s) - catalysis , diffusion , fluorescence , chemistry , resolution (logic) , high resolution , combinatorial chemistry , chemical engineering , biological system , computer science , organic chemistry , thermodynamics , physics , optics , biology , engineering , artificial intelligence , geology , remote sensing
Shedding light on catalysis : For the first time, transport phenomena and their influence on catalysis are directly observed for individual catalytic particles by single‐turnover mapping using high‐resolution fluorescence microscopy. The Thiele modulus could be measured with just one experiment, proving the existence of diffusional limitations for the Ti‐MCM‐41 catalyzed epoxidation of a fluorescent reporter molecule (see picture; TBHP= tert ‐butylhydroperoxide).