Mesostructured CeO2 as an Effective Catalyst for Styrene Synthesis by Oxidative Dehydrogenation of Ethylbenzene
Mesostructured CeO2 as an Effective Catalyst for Styrene Synthesis by Oxidative Dehydrogenation of Ethylbenzene
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DOI：
10.1007/s10562-009-0174-x
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发表时间：
2009-10
影响因子：
2.8
通讯作者：
Jie Xu;Lu-Cun Wang;Yongmei Liu;Yong Cao;Heyong He;Kangnian Fan
中科院分区：
文献类型：
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作者：
Jie Xu;Lu-Cun Wang;Yongmei Liu;Yong Cao;Heyong He;Kangnian Fan
采用模板辅助沉淀法合成了一种新型的介孔氧化铈材料，并对其进行了分子氧氧化脱氢反应的研究。考察了焙烧温度对氧化铈催化剂催化性能的影响。在所测试的催化剂中，通过在450 °C下煅烧得到的CeO 2 -450样品表现出最高的苯乙烯转化率（34%）和苯乙烯选择性（87%）。比较ODH的反应速率（约。6.1 mmol ST gcat−1 h−1，450 °C）与当前文献中的高活性纳米结构碳基催化剂的对比实验证实了这些新材料的极高活性。CeO 2 -450样品的上级催化性能可以归因于其高的比表面积和增强的氧化还原性能，如H2-TPR测量所揭示的。
A new type of mesostructured ceria material was synthesized via template-assisted precipitation method and tested for the oxidative dehydrogenation (ODH) of ethylbenzene to styrene by molecular oxygen. The effect of calcination temperature on the catalytic performances of the ceria catalysts has been investigated. Among the catalysts tested, the CeO2-450 sample derived by calcination at 450 °C exhibited the highest ethylbenzene conversion (34%) and styrene selectivity (87%). Comparing the reaction rates for ODH of ethylbenzene (ca. 6.1 mmol ST gcat−1 h−1 at 450 °C) with the highly active nanostructured carbon-based catalysts in the current literature confirmed the very high activity of these new materials. The superior catalytic performance of the CeO2-450 sample can be attributed to its high specific surface area and enhanced redox properties as revealed by H2-TPR measurements.