title: Self-sustained carbon monoxide oxidation oscillations on size-selected platinum nanoparticles at atmospheric pressure.
abstract: High-quality mass spectrometry data of the oscillatory behavior of CO oxidation on SiO(2) supported Pt-nanoparticles at atmospheric pressure have been acquired as a function of pressure, coverage, gas composition and nanoparticle size. The oscillations are self-sustained for several days at constant temperature, pressure and CO/O(2) ratio. The frequency of the oscillations is very well defined and increases over time. The oscillation frequency is furthermore strongly temperature dependent with increasing temperature resulting in increasing frequency. A plausible mechanism for the oscillations is proposed based on an oxidation-reduction cycle of the nanoparticles which change the rate of CO oxidation on the particles.
authors: CINF, Department of Physics, Technical University of Denmark, Fysikvej 312, 2800 Lyngby, Denmark.
authors: Robert
authors: R
authors: Jensen
authors: Thomas
authors: T
authors: Andersen
authors: Anders
authors: A
authors: Nierhoff
authors: Thomas
authors: T
authors: Pedersen
authors: Ole
authors: O
authors: Hansen
authors: Søren
authors: S
authors: Dahl
authors: Ib
authors: I
authors: Chorkendorff