2024-03-29T13:52:18Zhttps://eprints.lib.hokudai.ac.jp/dspace-oai/requestoai:eprints.lib.hokudai.ac.jp:2115/57342022-11-17T02:08:08Zhdl_2115_20059hdl_2115_151Surface phase transitions of Pt(110) studied by desorption dynamics of product CO2 in steady-state CO oxidationRzeznicka, I.Morales de la Garza, L.1000030002116Matsushima, T.松島, 龍夫open access431.35The transformation of (1×2) into (1×1) on a Pt(110) surface in the course of CO oxidation was studied through the analysis of both angular and velocity distributions of desorbing product CO2 and low-energy electron diffraction (LEED) intensity. The intensity of half-order LEED spots decreased quickly, showing the beginning of the transformation of (1×2)→(1×1) just below the kinetic transition, where the rate-determining step switched from CO adsorption to O2 dissociation. On the other hand, the angular distribution of desorbing CO2 sharply changed at a CO pressure far above the kinetic transition, where (1×2) domains disappeared. Below this approximate CO pressure, CO2 was mostly formed on (1×2) domains regardless of its reduced area.AVS Science & Technology of Materials, Interfaces, and Processing2002-07engjournal articleVoRhttp://hdl.handle.net/2115/5734https://doi.org/10.1116/1.14889450734-2101Journal of Vacuum Science & Technology A: Vacuum, Surfaces, and Films20414751480https://eprints.lib.hokudai.ac.jp/dspace/bitstream/2115/5734/1/JVS%26TA-VSF20%284%29.pdfapplication/pdf239.1 KB2002-07