Comparison of AFM and HRTEM to determine the metal particle morphology andloading of an Au/TiO2 catalyst

Authors
Dokou, E Stangland, EE Andres, RP Delgass, WN Barteau, MA
Citation
E. Dokou et al., Comparison of AFM and HRTEM to determine the metal particle morphology andloading of an Au/TiO2 catalyst, CATAL LETT, 70(1-2), 2000, pp. 1-7
Citations number
59
Categorie Soggetti
Physical Chemistry/Chemical Physics","Chemical Engineering
Journal title
CATALYSIS LETTERS
ISSN journal
1011372X → ACNP
Volume
70
Issue
1-2
Year of publication
2000
Pages
1 - 7
Database
ISI
SICI code
1011-372X(2000)70:1-2<1:COAAHT>2.0.ZU;2-C
Abstract
Atomic force microscopy (AFM) has been used to study the morphology of an u ltrafine gold-on-titania catalyst. By using TappingMode(TM) AFM (TMAFM) and SuperSharp silicon probes to minimize tip radius artifacts, we determined values for the average Au particle diameter and the gold loading in good ag reement with high-resolution transmission electron microscopy (HRTEM) resul ts. These results demonstrate the ability of AFM to characterize real suppo rted metal catalysts with small metal particles (<5 nm) and low metal loadi ngs, achieving resolution comparable to HRTEM, but in the ambient environme nt.