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学科主题: 物理化学
题名: Highly active metal sites confined at oxide/metal interfaces for catalytic oxidation reactions
作者: Fu Q(傅强) ;  Li WX(李微雪) ;  Mu RT(慕仁涛) ;  Yao YX(姚云喜) ;  Ma T(马腾) ;  Liu HY(刘洪阳) ;  Su HY(苏海燕) ;  Ma D(马丁) ;  Gu XK(顾向奎) ;  Chen LM(陈礼敏) ;  Wang Z(王珍) ;  Zhang H(张辉) ;  Wang B(王冰) ;  Bao XH(包信和)
会议文集: Abstract Book
会议名称: International Conference on Clean Energy Science 2011
会议日期: 2011-4-10
出版日期: 2011
会议地点: 大连
通讯作者: 包信和
出版者: 待补充
出版地: 待补充
合作性质: 墙报
部门归属: 502组
主办者: 大连化物所
摘要: Bimetallic catalysts are widely used in many heterogeneous catalytic processes. With rational design of the surface structure of the bimetallic catalysts, improved catalytic performance can be achieved in comparison to their parent metals. Here, we demonstrate that the nanostructured ferrous oxides (FeO) grown on Pt present the best reactivity to the CO oxidation among various Fe-Pt(111) surface structures. Using surface science measurements and density functional calculations, we show that the interface confinement effect can be attributed to the stabilization of the monolayer-dispersed ferrous oxide nanoislands and coordinatively unsaturated ferrous (CUF) sites at the edges of the FeO nanoislands by taking advantage of strong adhesion between the nanostructured oxides and the metal substrates. The CUF sites together with the metal supports are active for O2 activation, and the structural ensemble was highly efficient for CO oxidation using both model systems and practical supported catalysts. The interface confinement effect could be extended to other oxide-metal systems as well. In Pt-Ni systems, we observe the formation of monolayer-dispersed NiO nanoislands on Pt(111) and the interface-confined coordinatively unsaturated Ni atoms. The NiO/Pt(111) is highly active for CO oxidation as well.
英文摘要: Bimetallic catalysts are widely used in many heterogeneous catalytic processes. With rational design of the surface structure of the bimetallic catalysts, improved catalytic performance can be achieved in comparison to their parent metals. Here, we demonstrate that the nanostructured ferrous oxides (FeO) grown on Pt present the best reactivity to the CO oxidation among various Fe-Pt(111) surface structures. Using surface science measurements and density functional calculations, we show that the interface confinement effect can be attributed to the stabilization of the monolayer-dispersed ferrous oxide nanoislands and coordinatively unsaturated ferrous (CUF) sites at the edges of the FeO nanoislands by taking advantage of strong adhesion between the nanostructured oxides and the metal substrates. The CUF sites together with the metal supports are active for O2 activation, and the structural ensemble was highly efficient for CO oxidation using both model systems and practical supported catalysts. The interface confinement effect could be extended to other oxide-metal systems as well. In Pt-Ni systems, we observe the formation of monolayer-dispersed NiO nanoislands on Pt(111) and the interface-confined coordinatively unsaturated Ni atoms. The NiO/Pt(111) is highly active for CO oxidation as well.
内容类型: 会议论文
URI标识: http://cas-ir.dicp.ac.cn/handle/321008/116123
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:
Fu Q,Li WX,Mu RT,et al. Highly active metal sites confined at oxide/metal interfaces for catalytic oxidation reactions[C]. 见:International Conference on Clean Energy Science 2011. 大连. 2011-4-10.
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