Synthesis of mesoporous silica with embedded nickel nanoparticles for catalyst applications |
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Authors: | Leite E R Carreño N L Longo E Valentini A Probst L F |
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Affiliation: | CMDMC-LIEC, Department of Chemistry, UFSCar, Via Washington Luiz, Km 235, C.P. 676-CEP 13565-905, S?o Carlos, SP. |
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Abstract: | Here we describe a new route for the synthesis of nanometric Ni particles embedded in a mesoporous silica material with excellent potential for catalytic applications. Mesoporous silica with a surface area in the range of 202-280 m2/g, with narrow pore size distribution and Ni nanoparticles (particles in the range of 3-41 nm) were obtained in a direct process. A different approach was adopted to process such a nanocomposite. This new approach is based on the formation of a polymer with the silicon oxianion and nickel cation chelated to the macromolecule structure and on the control of the pyrolysis step. The CO/CO2 atmosphere resulting from the pyrolysis of the organic material promotes the reduction of the Ni citrate. |
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