title: Copper-Nitride Nanowires Array: An Efficient Dual-Functional Catalyst Electrode for Sensitive and Selective Non-Enzymatic Glucose and Hydrogen Peroxide Sensing.
abstract: It is highly attractive to develop non-noble-metal nanoarray architecture as a 3D-catalyst electrode for molecular detection due to its large specific surface area and easy accessibility to target molecules. Here, we report the development of a copper-nitride nanowires array on copper foam (Cu3N NA/CF) as a dual-functional catalyst electrode for efficient glucose oxidation in alkaline solutions and hydrogen peroxide (H2O2) reduction in neutral solutions. Electrochemical tests indicate that such Cu3N NA/CF possesses superior non-enzymatic sensing ability toward rapid glucose and H2O2detection with high selectivity. At 0.40 V, this sensor offers a high sensitivity of 14 180 μA mm cm-2for glucose detection, with a wide linear range from 1 μm to 2 mm, a low detection limit of 13 nm (S/N=3), and satisfactory stability and reproducibility. Its application in determining glucose in human blood serum is also demonstrated. Amperometric H2O2sensing can also been realized with a sensitivity of 7600 μA mm cm-2, a linear range from 0.1 μm to 10 mm, and a detection limit of 8.9 nm (S/N=3). This 3D-nanoarray architecture holds great promise as an attractive sensing platform toward electrochemical small molecules detection.
authors.affiliation: College of Chemistry, Sichuan University, Chengdu, 610064, Sichuan, China.
authors.forename: Zao
authors.initials: Z
authors.lastname: Wang
authors.affiliation: College of Chemistry, Sichuan University, Chengdu, 610064, Sichuan, China.
authors.forename: Xiaoqin
authors.initials: X
authors.lastname: Cao
authors.affiliation: College of Chemistry, Sichuan University, Chengdu, 610064, Sichuan, China.
authors.forename: Danni
authors.initials: D
authors.lastname: Liu
authors.affiliation: College of Chemistry, Sichuan University, Chengdu, 610064, Sichuan, China.
authors.forename: Shuai
authors.initials: S
authors.lastname: Hao
authors.affiliation: College of Chemistry and Chemical Engineering, Qufu Normal University, Qufu, 273165, Shandong, China.
authors.forename: Rongmei
authors.initials: R
authors.lastname: Kong
authors.affiliation: Chengdu Institute of Geology and Mineral Resources, Chengdu, 610081, Sichuan, China.
authors.forename: Gu
authors.initials: G
authors.lastname: Du
authors.affiliation: Chemistry Department, King Abdulaziz University, Jeddah, 21589, Saudi Arabia.
authors.forename: Abdullah M
authors.initials: AM
authors.lastname: Asiri
authors.affiliation: College of Chemistry, Sichuan University, Chengdu, 610064, Sichuan, China.
authors.forename: Xuping
authors.initials: X
authors.lastname: Sun
keywords: copper nitride; dual-functional catalyst; glucose; hydrogen peroxide; nanowires array