DICP OpenIR
Subject Area物理化学
Morphology-dependent nanocatalysis on metal oxides
Shen WJ(申文杰)
Source Publicationfall symposium 2011
Conference Name韩国化学工程学会秋季年会
Conference Date2011-10-26
2011
Conference Place首尔
Pages8-0
Publisher待补充
Publication Place待补充
Cooperation Status分会特邀报告
Department501
Funding Organization仁荷大学
AbstractNnoastructured 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.; 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.
Document Type会议论文
Identifierhttp://cas-ir.dicp.ac.cn/handle/321008/115969
Collection中国科学院大连化学物理研究所
Corresponding AuthorShen WJ(申文杰)
Recommended Citation
GB/T 7714
Shen WJ. Morphology-dependent nanocatalysis on metal oxides[C]. 待补充:待补充,2011:8-0.
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