Synthesis of dendritic silver nanostructures and their application in hydrogen peroxide electroreduction

✍ Scribed by Xia Qin; Huicai Wang; Xinsheng Wang; Zhiying Miao; Yuxin Fang; Qiang Chen; Xueguang Shao

• Book ID: 103828494
• Publisher: Elsevier Science
• Year: 2011
• Tongue: English
• Weight: 736 KB
• Volume: 56
• Category: Article
• ISSN: 0013-4686
• DOI: 10.1016/j.electacta.2011.01.058

✦ Synopsis

Well-defined silver (Ag) dendritic nanostructures were successfully synthesized by electrodeposition without the use of any template or surfactant. X-ray diffraction (XRD), scanning electron microscopy (SEM) and transmission electron microscopy (TEM) were employed to investigate the as-prepared Ag nanomaterials. These dendrites are aggregates of Ag nanoparticles, which are highly crystalline in nature. The concentration of AgNO 3 affects the shape of the nanoparticles. In addition, the electrochemical properties of the Ag dendrite-modified glassy carbon electrode (Ag/GC) were characterized by cyclic voltammetry and chronoamperometry. Results indicated that the as-obtained Ag dendrites exhibited favorable electroreduction activity towards oxygen (O 2 ) and hydrogen peroxide (H 2 O 2 ). When used as a sensor, the Ag/GC electrode exhibited a wide linear range of 0.005-12 mM H 2 O 2 , with a remarkable sensitivity of 7.39 A/mM, a detection limit of 0.5 M, estimated at a signal-to-noise ratio of 3, and a rapid response time (within 5 s). Moreover, the electrode showed good reproducibility, anti-interferant ability and long-term stability.