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题名: Au-Cu alloy nanoparticles supported on silica gel as catalyst for CO oxidation: Effects of Au/Cu ratios
作者: Liu, Xiaoyan1, 3;  Wang, Aiqin1;  Zhang, Tao1;  Su, Dang-Sheng2;  Mou, Chung-Yuan3
关键词: Au-Cu alloy ;  Gold ;  Copper ;  Nanoparticle ;  CO oxidation ;  PROX
刊名: CATALYSIS TODAY
发表日期: 2011-02-02
DOI: 10.1016/j.cattod.2010.05.019
卷: 160, 期:1, 页:103-108
收录类别: SCI
文章类型: Article
WOS标题词: Science & Technology ;  Physical Sciences ;  Technology
类目[WOS]: Chemistry, Applied ;  Chemistry, Physical ;  Engineering, Chemical
研究领域[WOS]: Chemistry ;  Engineering
英文摘要: Au-Cu bimetallic catalysts with Au/Cu ratios ranging from 3/1 to 20/1 were prepared on silica gel support by a two-step method. The catalysts were characterized by ICP, XRD and TEM. The results showed that, irrespective of Au/Cu ratios, all the bimetallic nanoparticles had significantly reduced particle sizes (3.0-3.6 nm) in comparison with monometallic gold catalysts (5.7 nm). Both CO oxidation and PROX reactions were employed to evaluate the catalytic activities of Au-Cu bimetallic catalysts. For CO oxidation, the alloy catalysts show non-monotonic temperature dependence showing a valley in the intermediate temperature range. The catalyst with Au/Cu ratio of 20/1 gave the highest activity at room temperature, but its activity showed the deepest valley with increasing the reaction temperature. On the other hand, the catalyst with Au/Cu ratio of 3/1 exhibited the best performance for PROX reaction. For the Au/Cu ratios investigated, the bimetallic catalysts showed superior performance to monometallic gold catalysts, demonstrating the synergy between gold and copper. (C) 2010 Elsevier B.V. All rights reserved.
关键词[WOS]: GOLD CATALYSTS ;  DEPOSITION-PRECIPITATION ;  MESOPOROUS SUPPORT ;  NANOPOROUS GOLD ;  TEMPERATURE ;  PLATINUM ;  NANOCATALYSTS ;  CHEMISTRY ;  CLUSTERS ;  INERT
语种: 英语
WOS记录号: WOS:000286454100014
Citation statistics: 
内容类型: 期刊论文
URI标识: http://cas-ir.dicp.ac.cn/handle/321008/142536
Appears in Collections:中国科学院大连化学物理研究所_期刊论文

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作者单位: 1.Chinese Acad Sci, Dalian Inst Chem Phys, State Key Lab Catalysis, Dalian 116023, Peoples R China
2.Max Planck Soc, Fritz Haber Inst, D-14195 Berlin, Germany
3.Natl Taiwan Univ, Dept Chem, Taipei 106, Taiwan

Recommended Citation:
Liu, Xiaoyan,Wang, Aiqin,Zhang, Tao,et al. Au-Cu alloy nanoparticles supported on silica gel as catalyst for CO oxidation: Effects of Au/Cu ratios[J]. CATALYSIS TODAY,2011,160(1):103-108.
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