DICP OpenIR
Subject Area物理化学
Highly active metal sites confined at oxide/metal interfaces for catalytic oxidation reactions
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)
Source PublicationAbstract Book
Conference NameInternational Conference on Clean Energy Science 2011
Conference Date2011-4-10
2011
Conference Place大连
Pages161-0
Publisher待补充
Publication Place待补充
Cooperation Status墙报
Department502组
Funding Organization大连化物所
AbstractBimetallic 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.; 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.
Document Type会议论文
Identifierhttp://cas-ir.dicp.ac.cn/handle/321008/116123
Collection中国科学院大连化学物理研究所
Corresponding AuthorBao XH(包信和)
Recommended Citation
GB/T 7714
Fu Q,Li WX,Mu RT,et al. Highly active metal sites confined at oxide/metal interfaces for catalytic oxidation reactions[C]. 待补充:待补充,2011:161-0.
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