3D CoxP@NiCo-LDH heteronanosheet array: As a high sensitivity sensor for glucose

• Published in: Microchemical journal Vol. 172; p. 106923
• Main Authors: Zhang, Yu, He, Zhiyuan, Dong, Qiaoyan, Tang, Xin, Yang, Lu, Huang, Ke, Zou, Zhirong, Jiang, Xue, Xiong, Xiaoli
• Format: Journal Article
• Language: English
• Published: Elsevier B.V 01.01.2022
• Subjects: Cobalt phosphide (CoxP); Electrochemical sensor; Glucose (Glu); Heteronanosheet array; Layered double hydroxide (LDH); Glucose (Glu); Layered double hydroxide (LDH); Electrochemical sensor; Heteronanosheet array; Cobalt phosphide (CoxP)
• ISSN: 0026-265X; 1095-9149
• DOI: 10.1016/j.microc.2021.106923

A 3D cobalt phosphide coated nickel–cobalt layered double hydroxide heteronanosheet array on Ni foam (CoxP@NiCo-LDH NSA/NF) acts as a electrodet has excellent sensing performance for glucose with high sensitivity of 5732.1 μA mM−1 cm−2, low detection limit of 0.60 μM at S/N = 3. [Display omitted] •CoxP@NiCo-LDH heteronanosheet array (NSA) was prepared on Ni foam (NF) using electrodeposition and high-temperature phosphating technology.•CoxP@NiCo-LDH NSA/NF acts an efficient catalyst electrode for glucose oxidation.•CoxP@NiCo-LDH NSA/NF shows high sensing performance for glucose detection.•CoxP@NiCo-LDH NSA/NF operates efficiently in human serum samples. The development of an efficient and convenient non-enzymatic glucose (Glu) sensor is an extremely attractive and challenging subject. In this work, a 3D cobalt phosphide coated nickel–cobalt layered double hydroxide heteronanosheet array on Ni foam (CoxP@NiCo-LDH NSA/NF) was constructed using electrodeposition and high-temperature phosphating technology. Its unique heteronanosheet array structure and synergistic effect resulting in excellent electrochemical activity for Glu. The response time of the sensor is ultra-fast (<5 s), with a high sensitivity of 5732.1 µA·mM−1 cm−2, a wide linear range of 1 µM–3 mM, and a limit of detection (LOD) of 0.60 µM (S/N = 3). The detection of Glu in human serum also shows satisfactory reliability. This work provides more design strategies for the application of heterostructure electrocatalysts in analytical sensing.