Preparation, characterization and CO oxidation activity of Cu-Ce-Zr mixed oxide catalysts via facile dry oxalate-precursor synthesis
Preparation, characterization and CO oxidation activity of Cu-Ce-Zr mixed oxide catalysts via facile dry oxalate-precursor synthesis
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DOI：
10.1016/j.jiec.2015.06.038
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发表时间：
2015-11
影响因子：
6.1
通讯作者：
Guangying Fu;Dongsen Mao;Shuaishuai Sun;Jun Yu;Zhiqiang Yang
中科院分区：
文献类型：
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作者：
Guangying Fu;Dongsen Mao;Shuaishuai Sun;Jun Yu;Zhiqiang Yang
采用简单的干法焙烧-前驱体合成法制备了CuO-CeO 2-ZrO 2催化剂，并对催化剂进行了CO氧化性能测试。采用N2吸附、TEM、XRD、XPS、H2-TPR、CO-TPD和拉曼等技术研究了Cu含量对催化剂性能的影响。结果表明，随着Cu含量的增加，CuO分散度、SBET和CO吸附量均呈现火山式变化趋势。当Cu含量为18mol%时，催化剂的活性最高，在85 °C时CO转化率为99%。该方法制备的催化剂具有良好的上级性能，这主要归因于CuO物种的分散性以及CuO与铈锆相的强相互作用。
CuO-CeO2-ZrO2catalysts were prepared via facile dry oxalate-precursor synthesis and tested for CO oxidation. The effect of Cu contents was investigated by N2adsorption, TEM, XRD, XPS, H2-TPR, CO-TPD and Raman techniques. The results show that CuO dispersion,SBETand adsorbed CO amount exhibit a volcano trend with increasing the Cu content. The highest activity was achieved over the catalyst with 18 mol% Cu with the CO conversion being 99% at 85 °C. The superior performance of the catalyst prepared by this method is attributed to the finely dispersed CuO species and the strong interaction of CuO with ceria-zirconia phase.