Different synthesis protocols for Co3O4 -CeO2 catalysts--part 1: influence on the morphology on the nanoscale.
Different synthesis protocols for Co3O4 -CeO2 catalysts--part 1: influence on the morphology on the nanoscale.
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DOI：
10.1002/chem.201403636
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发表时间：
2015-01-07
期刊：
影响因子：
--
通讯作者：
Schubert U
中科院分区：
文献类型：
--
作者：
Yang J;Lukashuk L;Akbarzadeh J;Stöger-Pollach M;Peterlik H;Föttinger K;Rupprechter G;Schubert U
采用溶胶凝胶法和溶剂热处理相结合的方法制备了Co3O4改性CeO2(Co/Ce1：4)。通过合成程序控制Co的分布，得到了三种不同的形貌，即Co3O4纳米粒子分布在CeO2粒子表面，Co3O4和CeO2纳米粒子共存，以及Co3O4纳米粒子均匀分布在CeO2中。考察了不同形貌对Co3O4-CeO2的晶相(S)、粒径、比表面积和CO氧化催化活性的影响。Co3O4纳米粒子均匀分散在CeO2颗粒表面的催化剂活性最高。
Co3O4-modified CeO2 (Co/Ce 1:4) was prepared by a combination of sol–gel processing and solvothermal treatment. The distribution of Co was controlled by means of the synthesis protocol to yield three different morphologies, namely, Co3O4 nanoparticles located on the surface of CeO2 particles, coexistent Co3O4 and CeO2 nanoparticles, or Co oxide structures homogeneously distributed within CeO2. The effect of the different morphologies on the properties of Co3O4–CeO2 was investigated with regard to the crystallite phase(s), particle size, surface area, and catalytic activity for CO oxidation. The material with Co3O4 nanoparticles finely dispersed on the surface of CeO2 particles had the highest catalytic activity.