| 钯铑比例对贵金属稀土复合物性能的影响 |
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| 引用本文： | 张永,张爱敏,唐振艳,贺小昆,赵云昆,杨冬霞,郭律.钯铑比例对贵金属稀土复合物性能的影响[J].贵金属,2009,30(2). |
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| 作者姓名： | 张永 张爱敏 唐振艳 贺小昆 赵云昆 杨冬霞 郭律 |
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| 作者单位： | 昆明贵金属研究所,昆明贵研催化剂有限责任公司,云南,昆明,650106 |
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| 基金项目： | 国家高技术研究发展计划(863计划) |
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| 摘 要： | 通过溶胶凝胶法以无机盐为原料制备不同钯铑比例的贵金属稀土复合物,并采用透射电镜(TEM)、低温氮吸附和程序升温H2还原(TPR-H2),对其形貌特征和物化性能进行研究.结果表明:复合物以不规则球形粒子聚集成团存在,平均粒径约为100 nm;其比表面积和总孔容相对偏小,前者随钯铑比例降低先减少后增加,后者呈双峰或多峰分布特征;其储氧值和还原起点温度范围分别是892.0～1535.8 μmol/g和100～111 ℃,前者随钯铑比例降低逐渐减少,后者随钯铑比例降低先升高后降低.复合物具有作为汽车尾气净化三元催化剂涂层料的潜在优异起燃性能和储氧特性.
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| 关 键 词： | 物理化学 贵金属 稀土 复合物 |
Influence of Pd and Rh Ratio on the Properties of Composites of Precious Metals and Rare Earths |
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| ZHANG Yong,ZHANG Aimin,TANG Zhenyan,HE Xiaokun,ZHAO Yunkun,YANG Dongxia,GUO Lu.Influence of Pd and Rh Ratio on the Properties of Composites of Precious Metals and Rare Earths[J].Precious Metals,2009,30(2). |
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| Authors: | ZHANG Yong ZHANG Aimin TANG Zhenyan HE Xiaokun ZHAO Yunkun YANG Dongxia GUO Lu |
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| Affiliation: | Kunming Sino-Platinum Metals Catalyst Co.Ltd.;Kunming Institute of Precious Metals;Kunming;Yunnan 650106;China |
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| Abstract: | Composites of rare earths and precious metals with different Pd and Rh ratios were prepared with inorganic materials by sol-gel method.Their morphologies and physicochemical properties were investigated through TEM,low temperature nitrogen adsorption and TPR-H 2.The composites exist in a form of agglomerate of irregular sphere particles with an average particle size of 100 nm.Their specific area and total pore volume are relatively small with a bi-peak or multi-peak distribution characteristic of pore volum... |
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| Keywords: | physical chemistry precious metals rare earths composites |
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