Publication Type
Journal
Journal Name
Nanoscale Research Letters
Publication Date
Page Number
614
Volume
9
Abstract
In situ heating study via a simultaneous secondary electron (SE) and transmitted electron (TE) microscopy is extremely insightful because information from the surface (SE) and bulk (TE) can be readily obtained. The leached Au/Fe2O3 catalyst has voids on the surface of Fe2O3. Upon heating to 500 oC, voids shrank and disappeared, while internal Au species diffused to the surface to form new nanoparticles. Heating in vacuum reduced Fe2O3 to Fe3O4. Heating at 700 oC caused coalescence and growth of Au particles and formation of faceted Fe3O4 surfaces. We achieved 1.1 nm resolution in SE imaging during in situ heating.
