Novel Sol-Gel Based Pt Nanocluster Catalysts for Propane Dehydrogenation
Novel Sol-Gel Based Pt Nanocluster Catalysts for Propane Dehydrogenation
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DOI：
10.1006/jcat.1999.2782
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发表时间：
2000-04
影响因子：
7.3
通讯作者：
A. Sault;A. Martino;Jeffrey S. Kawola;E. Boespflug
中科院分区：
文献类型：
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作者：
A. Sault;A. Martino;Jeffrey S. Kawola;E. Boespflug
我们报道了用两种新型合成策略制备的丙烷脱氢催化剂，该策略将反胶束Pt纳米团簇技术与二氧化硅和氧化铝溶胶-凝胶处理相结合。不像其他一些溶胶-凝胶催化剂制剂。这些催化剂中的铂颗粒没有被封装在支撑结构中，整个铂颗粒表面都可以进行反应。这些催化剂的转换频率（TOF）与传统技术（如浸渍）制备的铂催化剂相当，但我们的催化剂对碳中毒失活的抵抗力要大得多。传统制备的PtSn催化剂的失活行为比纯Pt催化剂更为典型。
We report propane dehydrogenation behavior of catalysts prepared using two novel synthesis strategies that combine inverse micelle Pt nanocluster technology with silica and alumina sol-gel processing. Unlike some other sol-gel catalyst preparations. Pt particles in these catalysts are not encapsulated in the support structure and the entire Pt particle surface is accessible for reaction. Turnover frequencies (TOF) for these catalysts are comparable to those obtained over Pt catalysts prepared by traditional techniques such as impregnation, yet the resistance to deactivation by carbon poisoning is much greater in our catalysts. The deactivation behavior is more typical of traditionally prepared PtSn catalysts than of pure Pt catalysts.