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Co9S8 hollow spheres for enhanced electrochemical detection of hydrogen peroxide

Author:
Zhang, Bingyan  Zhang, Xiaofan  Huang, Dekang  Li, Shaohui  Yuan, Huailiang  Wang, Mingkui  Shen, Yan  


Journal:
TALANTA


Issue Date:
2015


Abstract(summary):

This work reports on an experimental investigation of Co9S8 hollow spheres with excellent interfacial charge transfer ability for the electrochemical detection of hydrogen peroxide and glucose in alkaline environment. The result reveals that the Co9S8 hollow spheres exhibit excellent electrocatalytic activity for the reduction of hydrogen peroxide. An electrochemical sensor based on Co9S8 can be further realized, exhibiting a linear response range from 0.0001 to 11.11 mM for hydrogen peroxide with a low detection limit of 0.02 mu M, and a high sensitivity of 267.2 mA mol(-1) cm(-2), which is one of the highest values among the non-enzymatic sensors based on inorganic oxides. The Co9S8 sensor also exhibits good response toward glucose at different concentrations. These results demonstrate that the as-prepared Co9S8 hollow spheres have a potential application in the development of sensors for enzyme-free detection of H2O2 and glucose. (C) 2015 Elsevier B.V. All rights reserved.


Page:
73---79


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