In Situ Formation of a 3D Amorphous Cobalt‐ Borate Nanoarray: An Efficient Non‐Noble Metal Catalytic Electrode for Non‐Enzyme Glucose Detection

• Published in: ChemistrySelect (Weinheim) 2018-10, Vol.3 (38), p.10580-10584
• Main Authors: Deng, Wenqing, Dai, Rui, You, Chao, Hu, Pingyue, Sun, Xuping, Xiong, Xiaoli, Huang, Ke, Huo, Feng
• Format: Article
• Language: English
• Subjects: 3D nanoarray; Amperometric; cobalt-borate; glucose sensor; non-enzymatic
• ISSN: 2365-6549; 2365-6549
• DOI: 10.1002/slct.201800646

It is highly desirable to design enzyme‐free nanoarray architecture as an efficient three‐dimensional (3D) catalyst electrode for sensitive and selective detection of glucose. In this communication, we report that in situ electrochemical development of an amorphous cobalt‐borate nanoarray supported on carbon cloth (Co–Bi /CC) as a durable and efficient 3D nanoarray electrocatalyst for glucose detection. As a glucose sensor, Co−Bi/CC electrode shows a fast amperometric response toward glucose, a detection limit of 0.042 μM (S/N=3), a response sensitivity of 4191.7 μA mM−1 cm−2. Importantly, it also demonstrates favourable reproducibility and long‐term stability. In situ formation of a 3D Amorphous Cobalt‐Borate Nanoarray behaves as an efficient catalyst electrode for glucose oxidation in alkaline solutions. Such Co−Bi nanoarray structured offered us a cost‐effective electrochemical sensor for high‐performance glucose detection. It shows superior sensing performances with a fast response time (less than 3 s), a low detection limit (0.042 μM, S/N=3), and a high sensitivity (4191.7 μA mM cm−2).