Belousov-Zhabotinsky(BZ) reaction for CO oxidation

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(1) The interaction of D atoms with D covered Pt (111) surfaces was studied with direct product methods and TPD (temperature-programmed desorption) spectra. First, D atoms are exposed with clean Pt (111) surface at D coverage more than the surface saturation coverage. We found D atom is adsorbed on the surface and absorbed into the bulk. We have investigated two mechanism of desorbed DィイD22ィエD2 through TPD technique. We concluded second orders reaction for reaction of desorbed D2 molecules.(2) Platinum is a well-known catalyst for the reaction between hydrogen and oxygen.Two experiments have been tried to investigate for it by TPD spectra.(I) Intensity of DィイD22ィエD2O desorption, after D atoms are exposed at O adsorbed Pt (111) surface.(ii) Intensity of DィイD22ィエD2O desorption, after O atoms are exposed at D adsorbed Pt (111) surface.We found for two experiment same two peak temperatures at 170K and 210K by TPD spectra have been observed, but these are quite different desorption mechanisms at 170K.For (I), DィイD22ィエD20 formed at surface is desorbed at 170K by TPD, and DィイD22ィエD2O formed from OD bond at surface by TPD is desorbed at 210K.For (ii), DィイD22ィエD2O is desorbed on the reaction of OD bond on surface with desorbed D atoms from the bulk at 170K by TPD, and DィイD22ィエD2O is desorbed at 210K as same as (I) mechanism.