| 초록 |
In recent years, nano-sized Pt catalysts has been attracting attention in chemical industry. Herein, we investigated the effect of stabilizer and preparation method on Pt dispersion. The Pt/C catalysts were prepared by deposition-precipitation, polyol, and impregnation method using the four types (sodium propionate, sodium gluconate, tri-sodium citrate, and sodium tartrate) of stabilizer. The prepared Pt/C catalysts were characterized by XRD, N2 adsorption-desorption, CO-chemisorption, and FE-TEM. The dispersion of Pt was varied by stabilizer and preparation method. Among them, Pt/C catalyst prepared by deposition-precipitation method with sodium propionate as stabilizer showed highest Pt dispersion as 59%. The dispersion of Pt was affected by nucleation and growth of Pt, which is dependent on pH variation. |
