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- W2149443385 abstract "Towards a better understanding of the interface chemistry of ionic liquid (IL) thin film catalytic systems we have applied a rigorous surface science model approach. For the first time, a model homogeneous catalyst has been prepared under ultrahigh vacuum conditions. The catalyst, di-μ-chlorobis(chlorotricarbonylruthenium) [Ru(CO)3Cl2]2, and the solvent, the IL 1-butyl-3-methylimidazolium bis(trifluoromethylsulfonyl)imide [BMIM][Tf2N], have been deposited by physical vapor deposition onto an alumina model support [Al2O3/NiAl(110)]. First, the interaction between thin films of [Ru(CO)3Cl2]2 and the support is investigated. Then, the ruthenium complex is co-deposited with the IL and the influence of the solvent on the catalyst is discussed. D2O, which is a model reactant, is further added. Growth, surface interactions, and mutual interactions in the thin films are studied with IRAS in combination with density functional (DFT) calculations. At 105 K, molecular adsorption of [Ru(CO)3Cl2]2 is observed on Al2O3/NiAl(110). The IRAS spectra of the binary [Ru(CO)3Cl2]2 + [BMIM][Tf2N] and ternary [Ru(CO)3Cl2]2 + [BMIM][Tf2N] + D2O show every characteristic band of the individual components. Above 223 K, partial decomposition of the ruthenium complex leads to species of molecular nature attributed to Ru(CO) and Ru(CO)2 surface species. Formation of metallic ruthenium clusters occurs above 300 K and the model catalyst decomposes further at higher temperatures. Neither the presence of the IL nor of D2O prevents this partial decomposition of [Ru(CO)3Cl2]2 on alumina." @default.
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- W2149443385 date "2012-01-01" @default.
- W2149443385 modified "2023-09-24" @default.
- W2149443385 title "Preparation and characterization of ultrathin [Ru(CO)3Cl2]2 and [BMIM][Tf2N] films on Al2O3/NiAl(110) under UHV conditions" @default.
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- W2149443385 doi "https://doi.org/10.1039/c2cp40697g" @default.
- W2149443385 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/22760015" @default.
- W2149443385 hasPublicationYear "2012" @default.
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