title: Bifunctional Ag@Pd-Ag Nanocubes for Highly Sensitive Monitoring of Catalytic Reactions by Surface-Enhanced Raman Spectroscopy.
abstract: We report a route to the facile synthesis of Ag@Pd-Ag nanocubes by cotitrating Na2PdCl4 and AgNO3 into an aqueous suspension of Ag nanocubes at room temperature in the presence of ascorbic acid and poly(vinylpyrrolidone). With an increase in the total titration volume, we observed the codeposition of Pd and Ag atoms onto the edges, corners, and side faces of the Ag nanocubes in a site-by-site fashion. By maneuvering the Pd/Ag ratio, we could optimize the SERS and catalytic activities of the Ag@Pd-Ag nanocubes for in situ SERS monitoring of the Pd-catalyzed reduction of 4-nitrothiophenol by NaBH4.
authors.affiliation: †School of Materials Science and Engineering, Georgia Institute of Technology, Atlanta, Georgia 30332, United States.|‡School of Materials Science and Engineering, Jingdezhen Ceramic Institute, Jingdezhen, Jiangxi 333403, PR China.
authors.forename: Jumei
authors.initials: J
authors.lastname: Li
authors.affiliation: §Department of Physics, Arizona State University, Tempe, Arizona 85287, United States.
authors.forename: Jingyue
authors.initials: J
authors.lastname: Liu
authors.affiliation: †School of Materials Science and Engineering, Georgia Institute of Technology, Atlanta, Georgia 30332, United States.
authors.forename: Yin
authors.initials: Y
authors.lastname: Yang
authors.affiliation: †School of Materials Science and Engineering, Georgia Institute of Technology, Atlanta, Georgia 30332, United States.
authors.forename: Dong
authors.initials: D
authors.lastname: Qin