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学科主题物理化学
Catalysis with the Nano Confinement at the Interface
Bao XH(包信和)
会议文集Proceedings of 2011 MRS Spring Meeting
会议名称2011 MRS Spring Meeting
会议日期2011-4-24
2011
会议地点旧金山
页码264-0
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502
主办者美国材料研究学会
英文摘要In the present talk, a unique effect of confinement on catalysis will be illustrated, and the emphasis will be laid on the alteration of electron properties between the interface and subsurface. Coordinatively unsaturated ferrous (CUF) sites confined in nanosized matrices are active centers in a wide range of enzyme and homogeneous catalytic reactions. Preparation of the analogous active sites at supported catalysts is of great significance in heterogeneous catalysis but remains a challenge. Based on surface science measurements and density functional calculations, we show that interface confinement effect could be utilized to stabilize the CUF sites by taking advantage of strong adhesion between ferrous oxides and metal substrates. The interface confined CUF sites together with the metal supports are active for O2 activation, producing reactive dissociated O atoms. We show that the unique structural ensemble was highly efficient for CO oxidation at low temperature under typical operating conditions of a proton exchange membrane fuel cell. References: [1]. Qiang Fu, WeiXue Li, Yunxi Yao, et. al Science, 328(2010)1141-1144 [2]. Yunxi Yao,Qiang Fu, Zhen Wang, et. al J. Phys. Chem. C, 114(2010)17069-17079 [3]. Rentao Mu1, Qiang Fu,1 Hong Xu, et. al J. of Am. Chem. Soc. in press (2011); In the present talk, a unique effect of confinement on catalysis will be illustrated, and the emphasis will be laid on the alteration of electron properties between the interface and subsurface. Coordinatively unsaturated ferrous (CUF) sites confined in nanosized matrices are active centers in a wide range of enzyme and homogeneous catalytic reactions. Preparation of the analogous active sites at supported catalysts is of great significance in heterogeneous catalysis but remains a challenge. Based on surface science measurements and density functional calculations, we show that interface confinement effect could be utilized to stabilize the CUF sites by taking advantage of strong adhesion between ferrous oxides and metal substrates. The interface confined CUF sites together with the metal supports are active for O2 activation, producing reactive dissociated O atoms. We show that the unique structural ensemble was highly efficient for CO oxidation at low temperature under typical operating conditions of a proton exchange membrane fuel cell. References: [1]. Qiang Fu, WeiXue Li, Yunxi Yao, et. al Science, 328(2010)1141-1144 [2]. Yunxi Yao,Qiang Fu, Zhen Wang, et. al J. Phys. Chem. C, 114(2010)17069-17079 [3]. Rentao Mu1, Qiang Fu,1 Hong Xu, et. al J. of Am. Chem. Soc. in press (2011)
语种英语
文献类型会议论文
条目标识符http://cas-ir.dicp.ac.cn/handle/321008/115946
专题中国科学院大连化学物理研究所
通讯作者Bao XH(包信和)
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Bao XH. Catalysis with the Nano Confinement at the Interface[C]. 待补充:待补充,2011:264-0.
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