Preparation, characterization and catalytic activity for CO oxidation of SiO2 hollow spheres supporting CuO catalysts
Preparation, characterization and catalytic activity for CO oxidation of SiO2 hollow spheres supporting CuO catalysts
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SiO2空心球负载CuO催化剂的制备、表征及CO氧化催化活性
DOI：
10.1007/s10562-007-9272-9
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发表时间：
2008-01-01
影响因子：
2.8
通讯作者：
Chen, Yi
中科院分区：
文献类型：
--
作者：
Song, Chunyan;Wang, Chunling;Chen, Yi
以碳微球为模板，采用溶胶-凝胶法合成二氧化硅空心球，并用作CuO/SiO2催化剂的载体。通过TEM、氮气吸附-脱附、XRD和TPR等手段对样品进行了表征，并探讨了其对CO氧化的催化性能。结果表明，与商业SiO2负载相比，SiO2空心球负载的CuO表现出更高的催化活性。催化活性的增强可能归因于独特的空心球形结构有利于催化剂中主要活性物质的形成和气体扩散。
Silica hollow spheres were synthesized by sol-gel process using carbon microspheres as templates, and used as supports for CuO/SiO2 catalysts. The samples were characterized by TEM, nitrogen adsorption-desorption, XRD and TPR, and furthermore, the catalytic performance for CO oxidation was approached. The results indicated that the catalytic activity of CuO supported on SiO2 hollow spheres exhibited much higher as compared to that supported on commercial SiO2. Enhancement of the catalytic activity may be attributed to the fact that the unique hollow spherical texture should facilitate the formation of main active species and gas diffusion in catalysts.