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Zouhair Boukha,Jonatan González-Prior,Beatriz de Rivas,Juan R. González-Velasco,Rubén López-Fonseca,José I. Gutiérrez-Ortiz 한국공업화학회 2018 Journal of Industrial and Engineering Chemistry Vol.57 No.-
Hydroxyapatite (HAP) support has been synthesised and impregnated with different amounts of Pd. Theprepared Pd/HAP catalysts have been thoroughly characterised by BET, XRD, TEM, UV–visible–NIR, FTIR,XPS, CO2-TPD and NH3-TPD techniques and tested in the DCE oxidation reaction. The characterisation of the catalysts has revealed a clear evolution of the Pd species structure, byincreasing the Pd content, from highly dispersed tetrahedral coordinated Pd2+ to larger Pd2+ speciesparticles adopting square planar geometry. The latter seems to be partially encapsulated by the HAPsupport. In DCE oxidation reaction the Pd/HAP system has shown an activity comparable to that of conventionalsystem (Pd/alumina). However, the former has proved high selectivity towards the production ofoxygenated products (COx (CO2 and CO)). Notably, in contrast to Pd/alumina, the DCE oxidation does notyield vinyl chloride intermediate product over Pd/HAP. This catalytic behaviour has been related to themoderate acidity of HAP compared to that of alumina together with its interaction with the Pd activephase. This report, then, considers that Pd(x)/HAP could be presented as a good alternative to thosereported in the available literature.