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• W2467939135 abstract "If one defines a catalyst as a substance which accelerates a chemical reaction but remains unaffected by it, many heterogeneous catalysts would fail the test. Structural changes often accompany reactions and may even be the deciding factor in catalyst performance. Sintering processes, facetting, and selective deposition of by-products (often reaction poisons) have all been observed on dispersed catalysts /1/. At a minimum, such processes alter the surface area and dispersion, and one can imagine stronger effects if the reaction itself is structure-sensitive, i.e., having differing rates depending on the crystal plane surface. It would be desirable to study the surface diffusion producing such changes in a “model catalytic” experiment, analogous to studies on single crystal surfaces in ultrahigh vacuum (UHV) which probe reaction kinetics and mechanism. We present here results of such an experiment for the CO + H2 reaction to CH4 on Ni surfaces. We adapt a method previously used /2/ to study mass transport by surface self-diffusion on single crystals in UHV. The kinetics of CO methanation on various Ni single crystal surfaces were already extensively studied in the past /3/." @default.
• W2467939135 created "2016-07-22" @default.
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• W2467939135 date "1988-01-01" @default.
• W2467939135 modified "2023-09-23" @default.
• W2467939135 title "Structural Changes on Ni Surfaces Induced by Catalytic CO Hydrogenation" @default.
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• W2467939135 doi "https://doi.org/10.1007/978-3-642-73343-7_100" @default.
• W2467939135 hasPublicationYear "1988" @default.
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