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Vol.44, No.12, 838 ~ 844, 2006
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| Title |
| Nano Materials ; Effects of Hydrogen Reduction Conditions on the Pt Particle Size of Carbon Nanotubes-supported Pt Catalyst |
| 김용환 Yong Hwan Kim , 류한웅 Han Woong Ryu , 조영래 Young Rae Cho , 정원섭 Won Sub Chung |
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| Abstract |
| CNT-supported Pt catalysts were prepared by impregnation with H2PtCl6 precursor and H2 reduction, and the effects of drying and reduction conditions on Pt particles mean size and distribution were investigated. In experiments, drying and reduction processes were conducted using a thermal balance type furnace and changes of gravity were measured. Sizes of Pt particles were estimated by powder XRD and TEM analysis. From the results of preparations at 150℃, it was found that residual water before reduction start affects the particles size and distribution. The size of Pt particles decreased with decrease in the amount of residual water. Also, fine and well dispersed Pt particles on CNTs supports showed rare increase in the sizes by additional H2 reduction at 350℃. |
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| Key Words |
| carbon nanotubes, Pt/CNTs, catalyst preparation, impregnation, hydrogen reduction |
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