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Vahid Khakyzadeh,Amir Ehsani,Rafael Luque 한국공업화학회 2022 Journal of Industrial and Engineering Chemistry Vol.111 No.-
A novel highly ordered network based on shed snakeskin has been employed as a sustainable/naturaltemplate, to fabricate efficient heterogeneous cobalt composite as catalyst by a nano-casting process. Characterization of the Cobalt nano-catalyst was investigated by several analysis methods includingTEM, FESEM-EDS mapping, XRD, XPS, TGA, ICP, Raman, ATR, and N2 sorption and results verified thepreparation of a nano-catalyst with highly ordered perforated structure, uniform pore size distribution,high surface area, and high stability. The nano-cobalt particles were uniformly disposed on the supportwith a particle size of about 100 nm, validated by various analysis methods. The catalytic performance ofthe synthesized catalyst was evaluated in the Suzuki-Miyaura reaction for Csp2 –Csp2 bond formation in highyields (up to 97%) and excellent reactivity. The catalyst could also be recycled for at least 10 reaction runswithout almost losing its activity (less than 10% after 10 runs).
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.
Jinghan Wang,김재현,Jeewon Bu,Dokyoon Kim,Soo Young Kim,남기태,Rajender S. Varma,Rajender S. Varma,Ho Won Jang,Rafael Luque,쇼코히메르모하메드레자 한국공업화학회 2022 Journal of Industrial and Engineering Chemistry Vol.107 No.-
Metal organic framework (MOF)-derived nanocatalysts on various nanostructured supports are generallyefficient heterogeneous catalysts employable for organic transformations. Herein, nickel Prussian blue(PB) nanoparticles were deployed to form NiFe2O4 nanocatalysts supported on 2D molybdenum disulfide(MoS2) through a facile heat treatment. NiFe2O4 nanocatalysts could be uniformly dispersed on the highspecific-area MoS2 surface, representing a highly efficient, inexpensive, and magnetically recoverablenanocomposite catalyst. The semiconductor property of MoS2 ensures a high electric conductivity, thusenhancing electron transfer between the reductant and the reactant. Furthermore, the strong magneticcharacteristics enable its convenient separation from the reaction mixture. NiFe2O4 nanoparticles onMoS2-supported produces multiple electron transfer pathways and overcomes known drawbacks of catalyticmethods that use metals alone, endowing long-term cycle stability. Overall, MoS2/NiFe2O4 exhibitedan excellent catalytic activity and high yields in the reduction of nitrobenzene in water, maintainedeven after five cycles.