杜玉扣教授在Chemistry-A European Journal 上发表研究论文
Design of PdAg Hollow Nanoflowers through Galvanic Replacement and Their Application for Ethanol Electrooxidation

Duan Bin, Beibei Yang, Ke Zhang,Caiqin Wang,Jin Wang,Jiatai Zhong,Yue Feng, Jun Guo, Yukou Du*(杜玉扣)

1College of Chemistry, Chemical Engineering and Materials Science, Soochow University Suzhou, P.R. China

2Testing and Analysis Center, Soochow University, Suzhou, P.R. China

Chemistry-A European Journal,201622(46),16642-16647

In this study, galvanic replacement provides a simple route for the synthesis of PdAg hollow nanoflower structures by using the Ag-seeds as sacrificial templates in the presence of l-ascorbic acid (reductant) and CTAC (capping agent). Transmission electron microscopy (TEM), scanning electron microscopy (SEM), X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), and EDS mapping were used to characterize the as-prepared PdAg hollow nanoflower catalysts, where they were alloyed nanoflower structures with hollow interiors. By maneuvering the Pd/Ag ratio, we found that the as-prepared Pd1Ag3hollow nanoflower catalysts had the optimized performance for catalytic activity toward ethanol oxidation reaction. Moreover, these as-prepared PdAg hollow nanoflower catalysts exhibited noticeably higher electrocatalytic activity as compared to pure Pd and commercial Pd/C catalysts due to the alloyed Ag–Pd composition as well as the hollow nanoflower structures. It is anticipated that this work provides a rational design of other architecturally controlled bimetallic nanocrystals for application in fuel cells.

链接:http://onlinelibrary.wiley.com/doi/10.1002/chem.201601544/abstract