Support effects in the selective gas phase hydrogenation ofp-chloronitrobenzene over gold

• DOI: 10.1007/bf03214922
• Publication Date: 2011-03-28T14:49:42Z
• Authors: Fernando Cárdenas...; Santiago Gómez-Quero; Noémie Perret; Mark A. Keane
• Keywords: Chemisorption; Reaction rate

The catalytic continuous gas phase hydrogenation of p-chloronitrobenzene (P=1 atm;T=423 K) has been investigated over a series oxide (Al2O3, TiO2, Fe2O3 and CeO2) supported Au (1 mol %) catalysts. application two catalyst synthesis routes,i.e. impregnation (IMP) deposition-precipitation (DP), considered where the DP route generated smaller mean particle sizes (1.5-2.8 nm) compared with IMP preparation (3.5-9.0 nm). catalysts have characterised in terms H2 chemisorption BET area measurements formation metallic post-activation verified by diffuse reflectance UV-Vis, XRD HRTEM analyses.p-Chloroaniline was as sole reaction product all no evidence C-Cl and/or C-NO2 bond scission aromatic ring reduction. specific rate increased decreasing size (from 9 to 3 nm), regardless nature support. This response extends reference Au/TiO2 provided World Gold Council. A decrease is for particles (< 2 can be attributed quantum effect. results presented establish basis design development versatile system clean production high value amino compounds under mild conditions.