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          Institute: Fritz-Haber-Institut     Collection: Inorganic Chemistry     Display Documents



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ID: 248742.1, Fritz-Haber-Institut / Inorganic Chemistry
Rh/GNF catalysts: Characterization and catalytic performance
in methylcyclopentane reactions
Authors:Paál, Zoltan; Teschner, Detre; Rodriguez, N.; Baker, R. Terry K.; Tóth, Lajos; Wild, Ute; Schlögl, Robert
Language:English
Research Context:Rh on Carbon-nanofiber
Date of Publication (YYYY-MM-DD):2005
Title of Journal:Catalysis Today
Volume:102–103
Start Page:254
End Page:258
Copyright:Elsevier
Review Status:Peer-review
Audience:Experts Only
Abstract / Description:Rh catalysts supported on two graphite nanofiber structures (herring-bone – GNF-H and platelet – GNF-P) have been synthesized and characterized by XPS and HRTEM. Rh was partly oxidized after storage in air but reduced to Rh by H2 treatments at 473 K. The graphitic character of GNF-P was closer to that of highly ordered pyrolytic graphite than that of GNF-H. H2 treatment hardly affected the properties of the graphite component. HRTEM shows the appropriate graphite structures and Rh crystallites, mainly on the surface of GNF. The catalytic properties in ring opening of methylcyclopentane (MCP) were close to each other, Rh/GNF-P with more ordered graphite structure favoring ‘‘ring opening’’ to C6 alkanes. The ring opening reaction was ‘‘selective’’, producing more methylpentanes than hexane. This selectivity increased at higher H2 pressures. As reported earlier, 2-methylpentane was the main source of <C6 fragments. Considerably less fragments
were produced on both Rh/GNF samples than on other Rh catalysts, due, likely, to more surface H on metallic active sites supplied from hydrogen stored by the GNF supports.
Free Keywords:Rh; Graphite nanofiber; Methylcyclopentane ring opening; XPS; Electron microscopy
External Publication Status:published
Document Type:Article
Communicated by:Robert Schlögl
Affiliations:Fritz-Haber-Institut/Inorganic Chemistry/Surface Analysis
Fritz-Haber-Institut/Inorganic Chemistry/Inorganic Chemistry
External Affiliations:Northeastern University
Institute of Isotope and Surface Chemistry, Hungarian Academy of Science
Institute of Technical Physics and Materials Science, Hungarian Academy of Science
Identifiers:URL:http://www.sciencedirect.com/science?_ob=MImg&_ima... [only for subscriber]
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