Abstract
Abstract By applying a pulsed arc-plasma process, Pt nanoparticles were deposited from a Pt cathode onto CeO2 powders to study their structure and catalytic activity for CO oxidation. Highly dispersed uniform metallic Pt crystallites with the size of 2.6 ± 0.7 nm were obtained. Because of the highly dispersed metallic Pt nanoparticles suitable for CO chemisorption, the catalyst prepared by arc-plasma exhibited higher CO oxidation activity than those prepared by conventional wet impregnation. However, the catalyst was deactivated to a larger extent compared to the impregnated catalyst after thermal aging at 900 °C in a stream of 10% H2O in air.
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