title: Co9S8 hollow spheres for enhanced electrochemical detection of hydrogen peroxide.
abstract: 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 11.11mM for hydrogen peroxide with a low detection limit of 0.02μM, and a high sensitivity of 267.2mA 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.
authors.affiliation: Wuhan National Laboratory for Optoelectronics, School of Optoelectronic Science and Engineering, Huazhong University of Science and Technology, Wuhan 430074, P. R. China.
authors.forename: Bingyan
authors.initials: B
authors.lastname: Zhang
authors.affiliation: Wuhan National Laboratory for Optoelectronics, School of Optoelectronic Science and Engineering, Huazhong University of Science and Technology, Wuhan 430074, P. R. China.
authors.forename: Xiaofan
authors.initials: X
authors.lastname: Zhang
authors.affiliation: Wuhan National Laboratory for Optoelectronics, School of Optoelectronic Science and Engineering, Huazhong University of Science and Technology, Wuhan 430074, P. R. China.
authors.forename: Dekang
authors.initials: D
authors.lastname: Huang
authors.affiliation: Wuhan National Laboratory for Optoelectronics, School of Optoelectronic Science and Engineering, Huazhong University of Science and Technology, Wuhan 430074, P. R. China.
authors.forename: Shaohui
authors.initials: S
authors.lastname: Li
authors.affiliation: Wuhan National Laboratory for Optoelectronics, School of Optoelectronic Science and Engineering, Huazhong University of Science and Technology, Wuhan 430074, P. R. China.
authors.forename: Huailiang
authors.initials: H
authors.lastname: Yuan
authors.affiliation: Wuhan National Laboratory for Optoelectronics, School of Optoelectronic Science and Engineering, Huazhong University of Science and Technology, Wuhan 430074, P. R. China.
authors.forename: Mingkui
authors.initials: M
authors.lastname: Wang
authors.affiliation: Wuhan National Laboratory for Optoelectronics, School of Optoelectronic Science and Engineering, Huazhong University of Science and Technology, Wuhan 430074, P. R. China. Electronic address: ciac_sheny@mail.hust.edu.cn.
authors.forename: Yan
authors.initials: Y
authors.lastname: Shen
keywords: Co(9)S(8); Electrochemical detection; Glucose; Hydrogen peroxide; Non-enzymatic sensor