Analysis of the surface of PtxNi1?x alloys |
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| Authors: | P Novacek E Taglauer and P Varga |
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| Institution: | (1) Institut für Allgemeine Physik, TU Wien, Wiedner Hauptstrasse 8-10, A-1040 Vienna, Austria;(2) Max Planck Institut für Plasmaphysik, W-8046 Garching, Federal Republic of Germany |
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| Abstract: | Summary The surface composition of three polycrystalline PtxNi1–x alloys (metal foils) was determined by ion scattering spectroscopy (ISS) with He ions of an energy of 1 keV. The targets have been pretreated by bombarding with rare-gas ions (He, Ar and Xe), by annealing at 500°C and by exposing them to increasing amounts of oxygen (up to 20 Langmuir). The results obtained from the polycrystalline alloys are compared to results from a Pt10Ni90 silica supported catalyst. The surface composition was also measured by ISS. The catalyst was pretreated by bombarding with He ions and by exposing it to 10 L oxygen. |
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