4.6 Article

Growth of Au-Pd2Sn Nanorods via Galvanic Replacement and Their Catalytic Performance on Hydrogenation and Sonogashira Coupling Reactions

Journal

LANGMUIR
Volume 34, Issue 36, Pages 10634-10643

Publisher

AMER CHEMICAL SOC
DOI: 10.1021/acs.langmuir.8b02023

Keywords

-

Funding

  1. European Regional Development Funds
  2. Spanish MINECO [ENE2013-46624-C4-3-R, MAT2014-59961-C2-2-R, CTQ2015-65040-P]
  3. China Scholarship Council
  4. AGAUR [2013 BP-A00344]
  5. Generalitat de Catalunya [2014 SGR 1638]
  6. Programa Internacional de Becas la Caixa-Severo Ochoa
  7. Severo Ochoa Program (MINECO) [SEV-2013-0295]

Ask authors/readers for more resources

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.

Authors

I am an author on this paper
Click your name to claim this paper and add it to your profile.

Reviews

Primary Rating

4.6
Not enough ratings

Secondary Ratings

Novelty
-
Significance
-
Scientific rigor
-
Rate this paper

Recommended

No Data Available
No Data Available