ISSN print edition: 0366-6352 ISSN electronic edition: 1336-9075 Registr. No.: MK SR 9/7 Published monthly

Ag@C core–shell structure composites-decorated Ag nanoparticles: zero current potentiometry for detection of hydrogen peroxide

Huan Hao, Qinglin Sheng, and Jianbin Zheng

Shaanxi Provincial Key Laboratory of Electroanalytical Chemistry, Institute of Analytical Science, Northwest University, Xi’an, China

E-mail: qinglinsheng@126.com

Abstract: Ag@C core–shell structure composites were successfully synthesized by hydrothermal method, and then Ag nanoparticles were decorated on the surface of Ag@C by reduction of AgNO₃. The morphology, composition and structure of the Ag@C@Ag composites were characterized by scanning electron microscopy (SEM), energy dispersive spectrometry (EDS) and X-ray diffraction (XRD). Cyclic voltammetry and amperometry were used to evaluate the electrocatalytic performance of the Ag@C@Ag/GCE for detection of H₂O₂. Meanwhile, a new electrochemical method of zero current potentiometry was used for electrochemical detection of H₂O₂. The linear range and the detection limit were from 0.2 to 10, and 0.07 μM, respectively.

Keywords: Electrochemical sensing; Zero current potentiometry; Core–shell structure; Silver nanoparticles; Hydrogen peroxide

Full paper is available at www.springerlink.com.

DOI: 10.1007/s11696-016-0001-y

Chemical Papers 71 (3) 535–542 (2017)