Nanosize Iron Oxide for CO Oxidation

摘要

Transition metal oxides are desirable alternatives to precious metals based catalysts for CO oxidation since they are less costly. Several nanosize iron oxides were prepared by using Headwaters Technology Innovation (HTI) NxCat colloidal chemistry nanotechnology. These catalysts were applied on CO oxidation and showed better performance than bulk iron oxide, and comparable performance to catalyst with 100 ppm Pd loading. The particle size of iron oxide veries with calcination temperature. When anneal temperature is below 300°C, the particle size of iron oxide is less than 10 nm based on TEM and XRD characterizations and is mainly existed as Fe{sub}3O{sub}4. At SV=600,000 h{sup}(-1), the advantage of nanosize iron oxide (3-5 nm) in onset activity is over 100°C compared to bulk iron oxide.