| 制备方法对Pt在氧化铝上分布状态的影响 |
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| 引用本文： | 陈葳,肖益鸿,ZHAN Ying-ying,蔡国辉,郑起.制备方法对Pt在氧化铝上分布状态的影响[J].福州大学学报(自然科学版),2001,29(2):88-91. |
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| 作者姓名： | 陈葳 肖益鸿 ZHAN Ying-ying 蔡国辉 郑起 |
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| 作者单位： | 1. 福州大学化学系,
2. Department of Chemistry, Fuzhou University, |
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| 基金项目： | 福建省科委重点资助!项目 (97-H - 2 8) |
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| 摘 要： | 以不同的浸渍方式制备了Pt/γ -Al2 O3 催化剂 ,通过体视显微镜观察其分布型式 ,用 5 %CO/He脉冲化学吸附法研究了Pt在催化剂颗粒中的分散度 .研究结果表明 :浸渍液的pH值、浸渍时间、竞争吸附剂的性质对Pt在γ -Al2 O3 球上的径向分布影响较大 ,以Pt溶胶为前驱物比以氯铂酸溶液为前驱物制得样品的分散度略高 .
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| 关 键 词： | 催化剂 Pt Al2O3 浸渍法 分散度 |
| 文章编号： | 1000-2243(2001)02-0088-04 |
| 修稿时间： | 2000年10月8日 |
Effect of the preparation methods on the distribution of Pt on the alumina surface |
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| CHEN Wei,XIAO Yi-hong,ZHAN Ying-ying,CAI Guo-hui,ZHENG Qi.Effect of the preparation methods on the distribution of Pt on the alumina surface[J].Journal of Fuzhou University(Natural Science Edition),2001,29(2):88-91. |
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| Authors: | CHEN Wei XIAO Yi-hong ZHAN Ying-ying CAI Guo-hui ZHENG Qi |
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| Institution: | (Department of Chemistry, Fuzhou University, Fuzhou, Fujian 350002, China) |
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| Abstract: | Pt/γ- A12O3 catalysts were prepared by different impregnation methods. The catalysts' distribution
models were observed by stereomicroscope. The metal dispersion on the surface of alumina was studied by 5%
CO/He pulse chemisorption. From our studies, It was found that the pH value of the solution, impregnation
time and different competitive adsorbates had significant effects on distribution of Pt in catalysts. The results
also showed that the dispersion of Pt will be changed with changing the pH value. A little higher dispersion of
the Pt was got when H2PtCl6 was substitued by colloidal Pt. |
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| Keywords: | catalyst Pt Al\-2O\-3 impregnation method dispersion types |
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