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学科主题: 物理化学
题名: Catalysis of the Confined System
作者: Bao XH(包信和)
会议文集: Proceedings of TOCAT6/APCAT5
会议名称: Sixth Tokyo Conference on Advanced Catalytic Science and Technology & Fitth Asia Pacific Congress on Catalysis
会议日期: 2010-7-18
出版日期: 2011
会议地点: 札幌
其他题名: 限域体系的纳米催化
通讯作者: 包信和
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: 日本催化学会
摘要: It is becoming a common understanding that the nano-confinement in catalyst structures pays in some way very important roles in creating active sites ad stabilizing the active configurations. In our previous literatures, we have reported a unique effect of the synergetic confinement between the concave walls of CNTs and the nano-particles inside its channel of CNT show a distinct decrease of their reduction temperature, compared to those lie on its exernal surface. The facile reduction of the oxides in the channels effects strikingly on the catalytic reactions, in paricular on those driven by redox process. For instance, the CNT ecasulated Rh-Mn and ferric oxide catalysts showed the significant enhancement of the catalytic performances in conversing syngas into C2 oxygenates and liquid oil, respectively. In the presentation, besides a short introduction on the catalsis modified by the CNT confinement, I will show also one of our recent results, which demonstates the unique catalysis of selective oxidation by an interface confined ferrous sites on Pt surface. Fe-containing cataysts are highly efficient and active in broad reange of enzyme and homogeneous catalytic processed. The key structural feature in thiese enzymes and metal complexes relies on two aspects: presence of coordinatively unsaturated Fe(CUF) sites as the active centers and stabilization of the unstable or metastable Fe states through confinement in nanospaces, such as proteins and ligands. Preparation of an analogous ensemble in hererogeneous supported catalysts, which accounts for 80% catalytic processesin industrial chemistry, is of great significance. This, however, remains challenging because of the unknown active centers, difficulty of molecular modeling fr reatinoal design due to computer capacity for evolved systems, and the reproducible synthesis of empirically derivd caralyst formulations.
英文摘要: It is becoming a common understanding that the nano-confinement in catalyst structures pays in some way very important roles in creating active sites ad stabilizing the active configurations. In our previous literatures, we have reported a unique effect of the synergetic confinement between the concave walls of CNTs and the nano-particles inside its channel of CNT show a distinct decrease of their reduction temperature, compared to those lie on its exernal surface. The facile reduction of the oxides in the channels effects strikingly on the catalytic reactions, in paricular on those driven by redox process. For instance, the CNT ecasulated Rh-Mn and ferric oxide catalysts showed the significant enhancement of the catalytic performances in conversing syngas into C2 oxygenates and liquid oil, respectively. In the presentation, besides a short introduction on the catalsis modified by the CNT confinement, I will show also one of our recent results, which demonstates the unique catalysis of selective oxidation by an interface confined ferrous sites on Pt surface. Fe-containing cataysts are highly efficient and active in broad reange of enzyme and homogeneous catalytic processed. The key structural feature in thiese enzymes and metal complexes relies on two aspects: presence of coordinatively unsaturated Fe(CUF) sites as the active centers and stabilization of the unstable or metastable Fe states through confinement in nanospaces, such as proteins and ligands. Preparation of an analogous ensemble in hererogeneous supported catalysts, which accounts for 80% catalytic processesin industrial chemistry, is of great significance. This, however, remains challenging because of the unknown active centers, difficulty of molecular modeling fr reatinoal design due to computer capacity for evolved systems, and the reproducible synthesis of empirically derivd caralyst formulations.
语种: 英语
内容类型: 会议论文
URI标识: http://cas-ir.dicp.ac.cn/handle/321008/115895
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:
Bao XH. Catalysis of the Confined System[C]. 见:Sixth Tokyo Conference on Advanced Catalytic Science and Technology & Fitth Asia Pacific Congress on Catalysis. 札幌. 2010-7-18.
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