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• W2334987101 abstract "Chemisorption and surface reactions of C2H4, CO, and H2 on clean and graphite carbon-modified Co(0001) surfaces have been investigated by thermal desorption spectroscopy, X-ray photoelectron spectroscopy, and low-energy electron diffraction. The chemisorption and decomposition behaviors of C2H4 depend largely on the vacant sites available on clean Co(0001) at 130 K. C2H4 chemisorbs dissociatively to produce C2H2(a) and H(a) at low exposures but both dissociatively and molecularly to produce C2H4(a), C2H2(a), and H(a) at large exposures. Upon heating, some C2H4(a) desorbs and vacates surface sites, which results in the simultaneous decomposition of C2H4(a) into C2H3(a) and H(a). At 350 K, C2H3(a) either undergoes further dehydrogenation into C2H2(a) and H(a) or hydrogenates to produce C2H4. C2H2(a) then completely dehydrogenates to graphite carbon and H2 at 424 K. Graphite carbon modified Co(0001) surfaces were prepared by the thermal decomposition of C2H4 on clean Co(0001). The graphite carbon exerts both site-blocking effect and electronic effect on the reactivity of Co(0001) surface, suppressing the decomposition of C2H4(a) and weakening the interaction between the Co surface and CO(a) and H2(a). These results provide fundamental understandings of elementary steps of relevant heterogeneous catalytic reactions catalyzed by Co-based catalysts." @default.
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• W2334987101 date "2011-02-10" @default.
• W2334987101 modified "2023-10-17" @default.
• W2334987101 title "Surface Chemistry of C₂H₄, CO, and H₂ on Clean and Graphite Carbon-Modified Co(0001) Surfaces" @default.
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• W2334987101 doi "https://doi.org/10.1021/jp111099g" @default.
• W2334987101 hasPublicationYear "2011" @default.
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