title: Design of PdAg Hollow Nanoflowers through Galvanic Replacement and Their Application for Ethanol Electrooxidation.
abstract: 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.
authors.affiliation: College of Chemistry, Chemical Engineering and Materials Science, Soochow University Suzhou, 215123, P.R. China.
authors.forename: Duan
authors.initials: D
authors.lastname: Bin
authors.affiliation: College of Chemistry, Chemical Engineering and Materials Science, Soochow University Suzhou, 215123, P.R. China.
authors.forename: Beibei
authors.initials: B
authors.lastname: Yang
authors.affiliation: College of Chemistry, Chemical Engineering and Materials Science, Soochow University Suzhou, 215123, P.R. China.
authors.forename: Ke
authors.initials: K
authors.lastname: Zhang
authors.affiliation: College of Chemistry, Chemical Engineering and Materials Science, Soochow University Suzhou, 215123, P.R. China.
authors.forename: Caiqin
authors.initials: C
authors.lastname: Wang
authors.affiliation: College of Chemistry, Chemical Engineering and Materials Science, Soochow University Suzhou, 215123, P.R. China.
authors.forename: Jin
authors.initials: J
authors.lastname: Wang
authors.affiliation: College of Chemistry, Chemical Engineering and Materials Science, Soochow University Suzhou, 215123, P.R. China.
authors.forename: Jiatai
authors.initials: J
authors.lastname: Zhong
authors.affiliation: College of Chemistry, Chemical Engineering and Materials Science, Soochow University Suzhou, 215123, P.R. China.
authors.forename: Yue
authors.initials: Y
authors.lastname: Feng
authors.affiliation: Testing and Analysis Center, Soochow University, Suzhou, 215123, P.R. China.
authors.forename: Jun
authors.initials: J
authors.lastname: Guo
authors.affiliation: College of Chemistry, Chemical Engineering and Materials Science, Soochow University Suzhou, 215123, P.R. China. duyk@suda.edu.cn.
authors.forename: Yukou
authors.initials: Y
authors.lastname: Du
keywords: PdAg; catalysts; ethanol oxidation; galavanic replacement; hollow nanoflowers