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学科主题: 物理化学
题名: Morphology-dependent nanocatalysis on metal oxides
作者: Shen WJ(申文杰)
会议文集: fall symposium 2011
会议名称: 韩国化学工程学会秋季年会
会议日期: 2011-10-26
出版日期: 2011
会议地点: 首尔
通讯作者: 申文杰
出版者: 待补充
出版地: 待补充
合作性质: 分会特邀报告
部门归属: 501
主办者: 仁荷大学
摘要: Nnoastructured metal oxides are widely used in catalysis where their catalytic properties are closely associated with the size and morphology at nanometer level. The effect of particle size has been well documented in the past two decades, but the shape of the nanoparticls has rarely been concerned. Here we illustrate that the redox and acidic-basic properties of metal oxides are largely dependent on their shape by taking Co3O4,Fe2O3, CeO2 and La2O3 as typical examples. The catalytic activities of nanorods and nanoparticles of these metal oxides are mainly governed by the nature of the exposed crystal planes.For instance, the predominant presence of {110} planes which are rich in active Co3+ on CO3O4 nanorods led to a much higher activity for CO oxidation than the nanoparticles that mainly exposed the {111} planes. Moreover, the preferably exposed surface planes also alter the dispersion of metal nanoparticles, and thus prompt the reaction performance significantly as observed in the case of gold nanoparticles on CeO2 nanorods. This sort of approach by morphology control will expedite the development of highly efficient catalysts, which allow preferential exposure of the catalytic active sites.
英文摘要: Nnoastructured metal oxides are widely used in catalysis where their catalytic properties are closely associated with the size and morphology at nanometer level. The effect of particle size has been well documented in the past two decades, but the shape of the nanoparticls has rarely been concerned. Here we illustrate that the redox and acidic-basic properties of metal oxides are largely dependent on their shape by taking Co3O4,Fe2O3, CeO2 and La2O3 as typical examples. The catalytic activities of nanorods and nanoparticles of these metal oxides are mainly governed by the nature of the exposed crystal planes.For instance, the predominant presence of {110} planes which are rich in active Co3+ on CO3O4 nanorods led to a much higher activity for CO oxidation than the nanoparticles that mainly exposed the {111} planes. Moreover, the preferably exposed surface planes also alter the dispersion of metal nanoparticles, and thus prompt the reaction performance significantly as observed in the case of gold nanoparticles on CeO2 nanorods. This sort of approach by morphology control will expedite the development of highly efficient catalysts, which allow preferential exposure of the catalytic active sites.
内容类型: 会议论文
URI标识: http://cas-ir.dicp.ac.cn/handle/321008/115969
Appears in Collections:中国科学院大连化学物理研究所_会议论文

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Recommended Citation:
Shen WJ. Morphology-dependent nanocatalysis on metal oxides[C]. 见:韩国化学工程学会秋季年会. 首尔. 2011-10-26.
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