| 초록 |
Direct synthesis of H2O2 is a simple and efficient process. When introducing the catalyst with the core-shell structure, the sintering of Pd metal was suppressed in the calcination, and a catalyst having a highly Pd dispersion was synthesized. Moreover, the physical detaching of Pd nanoparticle was inhabited in the synthetic reaction of H2O2. However, core-shell catalyst is not easy to control the thickness and pore size of the shell. It is necessary to increase the pore size for proper mass transfer. In this study, the catalyst with Pd/SiO2 nanoparticles coated with silica shell was introduced to easily control the shell thickness and pore size. In particular, the pore size of the shell was increased by adding a surfactant when synthesizing the shell. The hydrogen peroxide production rate was increased by adjusting the shell thickness and thereby synthesizing the nanocatalyst having an optimal shell thickness. |
