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Bahareh Reisi,Ali Reza Najafi Chermahini,Daily Rodríguez-Padrón,Mario J. Muñoz-Batista,Rafael Luque 한국공업화학회 2021 Journal of Industrial and Engineering Chemistry Vol.102 No.-
Bimetallic Pd-Ni catalysts were prepared via impregnation method, with effects of Pd/Ni ratio (wt%) ontheir catalytic performance for the oxidation of cyclohexane with molecular oxygen being investigated. Synthesized catalysts were characterized by a series of techniques including XRD, Nitrogen adsorption–desorption, H2-TPR, XPS, ICP-AES, TEM, SEM, and EDX. Compared to monometallic Pd, the additionof Ni to Pd was found to be effective in enhancing the selective oxidation of cyclohexane. Parameters suchas the temperature of the reaction, reaction times, catalyst amount, initial oxygen pressure and differentsolvents were investigated. Optimum conditions to improve cyclohexane conversion and selectivitytowards KA-oil (a mixture of cyclohexanone and cyclohexanol) over 4.0%Pd-4.0%Ni/KIT-6 catalystincluded 140 C, 1.0 MPa O2 and acetonitrile as solvent. Under these reaction conditions, 10.87 % conversionand 95.45 % selectivity for KA-oil were observed after 8 h of reaction. Reusability studies of theselected catalyst revealed an outstanding stability along four reaction cycles.