期刊
LANGMUIR
卷 34, 期 36, 页码 10634-10643出版社
AMER CHEMICAL SOC
DOI: 10.1021/acs.langmuir.8b02023
关键词
-
资金
- European Regional Development Funds
- Spanish MINECO [ENE2013-46624-C4-3-R, MAT2014-59961-C2-2-R, CTQ2015-65040-P]
- China Scholarship Council
- AGAUR [2013 BP-A00344]
- Generalitat de Catalunya [2014 SGR 1638]
- Programa Internacional de Becas la Caixa-Severo Ochoa
- Severo Ochoa Program (MINECO) [SEV-2013-0295]
Colloidal Pd2Sn and Au-Pd2Sn nanorods (NRs) with tuned size were produced by the reduction of Pd and Sn salts in the presence of size- and shape-controlling agents and the posterior growth of Au tips through a galvanic replacement reaction. Pd2Sn and Au-Pd2Sn NRs exhibited high catalytic activity toward quasi-homogeneous hydrogenation of alkenes (styrene and 1-octene) and alkynes (phenylacetylene and 1-octyne) in dichloromethane. Au-Pd2Sn NRs showed higher activity than Pd2Sn for 1-octene, 1-octyne, and phenylacetylene. In Au-Pd2Sn heterostructures, X-ray photoelectron spectroscopy evidenced an electron donation from the Pd2Sn NR to the Au tips. Such heterostructures showed distinct catalytic behavior in the hydrogenation of compounds containing a triple bond such as tolan. This can be explained by the aurophilicity of triple bonds. To further study this effect, Pd2Sn and Au-Pd2Sn NRs were also tested in the Sonogashira coupling reaction between iodobenzene and phenylacetylene in N,N-dimethylformamide. At low concentration, this reaction provided the expected product, tolan. However, at high concentration, more reduced products such as stilbene and 1,2-diphenylethane were also obtained, even without the addition of H-2. A mechanism for this unexpected reduction is proposed.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据