
Article Title
Porous Pt/Ag nanoparticles with excellent multifunctional enzyme mimic activities and antibacterial effects
Keywords
platinum, porous, oxygen reduction reaction, enzyme mimic, antibacterial
Abstract
ABSTRACT Enhancing the activity of Pt-based nanocatalysts is of great significance yet a challenge for the oxygen reduction reaction (ORR). In this work, a series of porous Pt/Ag nanoparticles (NPs) were fabricated from regular PtxAg100–x (x = 25, 50, 75) octahedra by a facile and economical dealloying process. Remarkable enhancement in multiple enzyme-mimic activities related to ORR was observed for the dealloyed Pt50Ag50 (D-Pt50Ag50) NPs. This effect can be attributed to the resulting Pt-rich surface structure, increased surface area, and a synergistic effect of Pt and Ag atoms in the D-Pt50Ag50 NPs. Furthermore, the D-Pt50Ag50 NPs exerted excellent antibacterial effects on two model bacteria (gram-negative Escherichia coli and gram-positive Staphylococcus aureus). The present work represents a significant advance in the exploration of the relation between controllable synthesis of high-quality nanoalloys and their novel catalytic properties for various promising applications, including catalysts, biosensors, and biomedicine.
Graphical Abstract
Publisher
Tsinghua University Press
Recommended Citation
Shuangfei Cai,Xinghang Jia,Qiusen Han,Xiyun Yan,Rong Yang,Chen Wang, Porous Pt/Ag nanoparticles with excellent multifunctional enzyme mimic activities and antibacterial effects. NanoRes.2017, 10(6): 2056–2069