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题名: Effects of doping in 25-atom bimetallic nanocluster catalysts for carbon-carbon coupling reaction of iodoanisole and phenylacetylene
作者: Li, Zhimin1, 2;  Yang, Xiujuan1;  Liu, Chao1;  Wang, Jin1;  Li, Gao1
关键词: Au-25 nanocluster ;  Carbon-carbon coupling reactions ;  Doping effects ;  Silver ;  Copper ;  Platinum
刊名: PROGRESS IN NATURAL SCIENCE-MATERIALS INTERNATIONAL
发表日期: 2016-10-01
DOI: 10.1016/j.pnsc.2016.09.007
卷: 26, 期:5, 页:477-482
收录类别: SCI
文章类型: Article
WOS标题词: Science & Technology ;  Technology
类目[WOS]: Materials Science, Multidisciplinary ;  Multidisciplinary Sciences
英文摘要: We here report the catalytic effects of foreign atoms (Cu, Ag, and Pt) doped into well-defined 25-gold-atom nanoclusters. Using the carbon-carbon coupling reaction of p-iodoanisole and phenylacetylene as a model reaction, the gold-based bimetallic MxAu25-x(SR)(18) (-SR=-SCH2CH2Ph) nanoclusters (supported on titania) were found to exhibit distinct effects on the conversion of p-iodoanisole as well as the selectivity for the Sonogashira cross-coupling product, 1-methoxy-4-(2-phenylethynyl) benzene). Compared to Au-25(SR)(18), the centrally doped Pt1Au24(SR)(18) causes a drop in catalytic activity but with the selectivity retained, while the AgxAu25-x(SR)(18) nanoclusters gave an overall performance comparable to Au-25(SR)(18). Interestingly, CuxAu25-x(SR)(18) nanoclusters prefer the Ullmann homo-coupling pathway and give rise to product 4,4'dimethoxy- 1,1'-biphenyl, which is in opposite to the other three nanocluster catalysts. Our overall conclusion is that the conversion of p-iodoanisole is largely affected by the electronic effect in the bimetallic nanoclusters' 13-atom core (i.e., Pt1Au12, CuxAu13-x, and Au-13, with the exception of Ag doping), and that the selectivity is primarily determined by the type of atoms on the MxAu12-x shell (M=Ag, Cu, and Au) in the nanocluster catalysts.
关键词[WOS]: GOLD NANOCLUSTERS ;  AEROBIC OXIDATION ;  C-N ;  CLUSTERS ;  COPPER ;  NANOPARTICLES ;  ACTIVATION ;  ALCOHOL
语种: 英语
WOS记录号: WOS:000389519800008
Citation statistics: 
内容类型: 期刊论文
URI标识: http://cas-ir.dicp.ac.cn/handle/321008/150420
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, Gold Catalysis Res Ctr, Dalian 116023, Peoples R China
2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China

Recommended Citation:
Li, Zhimin,Yang, Xiujuan,Liu, Chao,et al. Effects of doping in 25-atom bimetallic nanocluster catalysts for carbon-carbon coupling reaction of iodoanisole and phenylacetylene[J]. PROGRESS IN NATURAL SCIENCE-MATERIALS INTERNATIONAL,2016,26(5):477-482.
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