Surface chemistry of CH3Br and methyl modified by copper deposition on Ru(001)

Article Abstract:

The modification in the methyl fragments dehydrogenation upon completion of a single copper layer in the chemistry of methyl bromide on Cu/Ru(001) and the significant difference in reactivity of the Cu(2 ML)/Ru(001) or Cu(111) surfaces were investigated. Reactivity of the first pseudomorphic copper layer is significant toward methyl bromide and methyl dissociation. At (theta)(sub Cu) in the range 1-2 ML with 1 ML of CH(sub3)Br on top, work function change and temperature-programmed desorption measurements show a continuous increase at temperatures below any hydrogen or methane desorption around 370 K. This work function increase is attributed to a continuous decomposition of the methyl and its fragments, becoming the hydrogen source for the methyl-hydrogen recombination reaction to form methane. Upon completion of the second copper layer, the Ru(001) surface is passivated.

Copper, Surface chemistry

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Nitric oxide reduction by carbon monoxide over supported hexaruthenium cluster catalysts. 1. The active site structure that depends on supporting metal oxide and catalytic reaction conditions

Article Abstract:

The Ru K-edge extended X-ray absorption fine structure (EXAFS) is used to investigate the surface Ru site-structure, which is formed under various catalyst preparation and reaction conditions. The NO under NO+CO gas predominantly occupies the Ru metal surface of conventional Ru/TiO2 catalysts, as reported.

Science & research, Primary nonferrous metals, not elsewhere classified, Primary Smelting and Refining of Nonferrous Metal (except Copper and Aluminum), All Other Miscellaneous Chemical Product and Preparation Manufacturing, Catalysts, Chemical preparations, not elsewhere classified, Ruthenium, Observations, Chemistry, Physical and theoretical, Physical chemistry, Chemical properties

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