| 聚乙烯吡咯烷酮对Pt/Ru双金属纳米簇的结构和催化性能影响 |
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| 引用本文： | 陈定伟,王晓冰,涂伟霞,齐可,侯婷婷.聚乙烯吡咯烷酮对Pt/Ru双金属纳米簇的结构和催化性能影响[J].无机化学学报,2013,29(18). |
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| 作者姓名： | 陈定伟 王晓冰 涂伟霞 齐可 侯婷婷 |
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| 作者单位： | 北京化工大学有机无机复合材料国家重点实验室, 北京 100029;北京化工大学有机无机复合材料国家重点实验室, 北京 100029;北京化工大学有机无机复合材料国家重点实验室, 北京 100029;北京化工大学有机无机复合材料国家重点实验室, 北京 100029;北京化工大学有机无机复合材料国家重点实验室, 北京 100029 |
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| 基金项目： | 国家自然科学基金（No.21106006）资助项目。 |
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| 摘 要： | 以乙二醇为还原剂，通过微波热辐射制备得到稳定的Pt/Ru双金属胶体纳米簇，各颗粒粒径在1~2nm范围。考察了聚合物聚乙烯吡咯烷酮（PVP）对Pt/Ru双金属纳米簇表面原子组成及催化性能的影响。结果表明，PVP与金属前体之间的不同相互作用影响Pt/Ru双金属纳米簇的形成。在Pt/Ru双金属纳米簇形成之前加入PVP，Pt原子更容易富集在双金属表面，有利于增加Pt在催化反应中的作用。在PVP稳定的Pt/Ru双金属纳米簇中，除了零价态的Pt、Ru单质外，还存在氧化态的Pt化合物，归因于PVP与Pt前体的相互作用。在环己烯加氢反应中，PVP-Pt/Ru双金属纳米簇显示出比单金属纳米簇更优越的催化性能。
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| 关 键 词： | 纳米颗粒 聚合物 构效关系 铂 钌 |
Effect of Poly(N-vinyl-2-pyrrolidone) on Structure and Catalytic Activity of Platinum/Ruthenium Bimetallic Nanoclusters Catalysts |
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| CHEN Ding-Wei,WANG Xiao-Bing,TU Wei-Xi,QI Ke and HOU Ting-Ting.Effect of Poly(N-vinyl-2-pyrrolidone) on Structure and Catalytic Activity of Platinum/Ruthenium Bimetallic Nanoclusters Catalysts[J].Chinese Journal of Inorganic Chemistry,2013,29(18). |
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| Authors: | CHEN Ding-Wei WANG Xiao-Bing TU Wei-Xi QI Ke and HOU Ting-Ting |
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| Institution: | State Key Laboratory of Organic-Inorganic Composites, Beijing University of Chemical Technology, Beijing 100029, China;State Key Laboratory of Organic-Inorganic Composites, Beijing University of Chemical Technology, Beijing 100029, China;State Key Laboratory of Organic-Inorganic Composites, Beijing University of Chemical Technology, Beijing 100029, China;State Key Laboratory of Organic-Inorganic Composites, Beijing University of Chemical Technology, Beijing 100029, China;State Key Laboratory of Organic-Inorganic Composites, Beijing University of Chemical Technology, Beijing 100029, China |
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| Abstract: | Stable platinum-ruthenium (Pt/Ru) colloidal bimetallic nanoclusters were prepared via polyol reduction with microwave irradiation. The particle sizes are in the range of 1~2 nm. The effect of poly (N-vinyl-2-pyrrolidone) (PVP) on surface atomic distribution and catalytic activity of Pt/Ru bimetallic nanoclusters was investigated. Difference in the interaction between PVP and metal precursors influences the formation of the Pt/Ru bimetallic nanoclusters. The presence of PVP before the formation of the Pt/Ru nanoclusters tends to improve surface enrichment of Pt atoms and increases the contribution of Pt in catalytic reaction. In addition to the zero-valent metallic states of Pt and Ru, there exists the oxidized Pt species in PVP-stabilized Pt/Ru nanoclusters due to the interaction between Pt precursor and PVP. The PVP-Pt/Ru nanoclusters show better catalytic activity than monometallic nanoclusters in hydrogenation of cyclohexene. |
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| Keywords: | nanoclusters polymers structure-activity relationships platinum ruthenium |
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