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The effects of metal particle size on catalytic activities of Cu/SBA-15 with different Cu content were investigated for high selectivity of cyclohexane dehydrogenation. Overall, the smaller Cu nanoparticles exhibit higher hydrogen evolution rate or lower active energy barrier. But, even when the smaller CuO nanoparticles have formed on the catalyst with lower Cu content during the calcination, they...
A series of Ni-Cu/SiO2 catalysts were prepared by sol-gel method for use in the dehydrogenation of cyclohexane to evolve hydrogen. The Ni/SiO2 catalyst exhibits excellent catalytic activity but low selectivity, due to the highly dispersion of Ni species. After the addition of Cu, the Ni-Cu nanoparticles with narrow size distribution (3–6nm) and a uniform structure of bimetallic Ni and Cu has been...
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