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首页> 外文期刊>Journal of industrial and engineering chemistry >Enhancement in CO oxidation activity of nanosized Ce_xZr_(1-x)O2 solid solutions by incorporation of additional dopants
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Enhancement in CO oxidation activity of nanosized Ce_xZr_(1-x)O2 solid solutions by incorporation of additional dopants

机译:通过掺入其他掺杂剂增强纳米Ce_xZr_(1-x)O2固溶体的CO氧化活性

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摘要

The influence of Hf, Pr and Tb dopant cations on structural and catalytic properties of nanosized Ce_xZr_(1-x)O2 solid solutions has been investigated. A wide range of analytical techniques are utilized to characterize the synthesized materials, and the catalytic activity is evaluated for CO oxidation. XRD, Raman, SEM and TEM results suggested formation of dopant cation incorporated ceria-zirconia solid solutions with highly homogeneous morphology and lattice defects. The CO-TPR measurements revealed an enhanced reducibility of Ce_xZr_(1-x)O2 which is reflected in their better catalytic activity. The role of Tb~(4+)/Tb~(3+) and Pr~(4+)/Pr~(3+) redox couples in facilitating a higher activity has been addressed.
机译:研究了Hf,Pr和Tb掺杂阳离子对Ce_xZr_(1-x)O2纳米固溶体结构和催化性能的影响。广泛的分析技术被用来表征合成的材料,并评估了CO氧化的催化活性。 XRD,拉曼,SEM和TEM结果表明形成了掺杂阳离子的氧化铈-氧化锆固溶体,具有高度均匀的形貌和晶格缺陷。 CO-TPR测量显示Ce_xZr_(1-x)O2的还原性增强,这反映在其更好的催化活性上。研究了Tb〜(4 +)/ Tb〜(3+)和Pr〜(4 +)/ Pr〜(3+)氧化还原对在促进更高活性方面的作用。

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