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840 NATURE CHEMISTRY | VOL 3 | NOVEMBER 2011 | www.nature.com/naturechemistry news & views
 

Summary: 840 NATURE CHEMISTRY | VOL 3 | NOVEMBER 2011 | www.nature.com/naturechemistry
news & views
matrix material and whose red fluorescence
lights up the porous matrix. Optical
detection of this signal makes the approach
easily applied in situ, where catalysts can be
interrogated under reaction conditions.
Using this differential fluorescence
staining approach, Weckhuysen and co-
workers analysed the acidity of individual
FCC catalyst particles that were freshly made
or were treated in ways that mimicked the
deactivation processes they undergo in an
industrial FCC unit, such as coke formation,
metal deposition and hydrothermal ageing.
They directly visualized and mapped the
acidity of individual zeolite domains in
each catalyst particle, and uncovered large
heterogeneity in the acidity within each one
and among different particles, as well as at

  

Source: Agmon, Noam - Institute of Chemistry, Hebrew University of Jerusalem

 

Collections: Chemistry